{"id":370,"date":"2023-05-06T15:25:55","date_gmt":"2023-05-06T07:25:55","guid":{"rendered":"http:\/\/idc.birk.cn\/?p=370"},"modified":"2023-05-06T15:25:55","modified_gmt":"2023-05-06T07:25:55","slug":"linux%e7%bd%91%e7%bb%9c%e4%b9%8bnamespace%e3%80%81bridge%e3%80%81veth","status":"publish","type":"post","link":"https:\/\/idc.birk.cn\/?p=370","title":{"rendered":"Linux\u7f51\u7edc\u4e4bnamespace\u3001bridge\u3001veth"},"content":{"rendered":"

namespace<\/h1>\n

<\/a>\u524d\u8a00<\/h2>\n

namespace\u662fLinux\u865a\u62df\u7f51\u7edc\u7684\u4e00\u4e2a\u91cd\u8981\u6982\u5ff5\uff0c\u4f20\u7edf\u7684Linux\u7684\u8bb8\u591a\u8d44\u6e90\u662f\u5168\u5c40\u7684\uff0c\u5982\u679c\u8fdb\u7a0bid\u8d44\u6e90\u3002\u800cnamespace\u7684\u76ee\u7684\u9996\u5148\u5c31\u662f\u8bb2\u8fd9\u4e9b\u8d44\u6e90\u505a\u8d44\u6e90\u9694\u79bb\u3002Linux\u53ef\u4ee5\u5728\u4e00\u4e2aHost\u5185\u521b\u5efa\u8bb8\u591anamespace\uff0c\u4e8e\u662f\u90a3\u4e9b\u539f\u672c\u662flinux\u7684\u5168\u5c40\u8d44\u6e90\uff0c\u5c31\u53d8\u6210\u4e86namespace\u8303\u56f4\u5185\u7684\u201c\u5168\u5c40\u201d\u8d44\u6e90\uff0c\u800c\u4e14\u4e0d\u540cnamespace\u7684\u8d44\u6e90\u76f8\u4e92\u4e0d\u53ef\u89c1\uff0c\u5f7c\u6b64\u900f\u660e\u3002<\/p>\n

Linux namespace \u53ef\u4ee5\u9694\u79bb\u7684\u8d44\u6e90\u6709\uff1auts_ns\uff08\u5185\u5b58\u3001\u7248\u672c\u7b49\u5e95\u5c42\u4fe1\u606f\uff09\u3001ipc_ns\uff08\u6240\u6709\u4e0e\u8fdb\u7a0b\u901a\u4fe1\u7684\u4fe1\u606f\uff09\u3001 mnt_ns\uff08\u5f53\u524d\u88c5\u8f7d\u7684\u6587\u4ef6\u7cfb\u7edf\uff09\u3001 pid_ns\uff08\u6709\u5173\u8fdb\u7a0bid\u7684\u4fe1\u606f\uff09\u3001 user_ns\uff08\u8d44\u6e90\u914d\u989d\u7684\u4fe1\u606f\uff09\u3001 net_ns\uff08\u7f51\u7edc\u4fe1\u606f\uff09\u3002<\/p>\n

\u4e00\u4e2a\u8bbe\u5907\uff08Linux Device\uff09\u53ea\u80fd\u4f4d\u4e8e\u4e00\u4e2anamespace\u4e2d\uff0c\u4e0d\u540cnamespace\u4e2d\u7684\u8bbe\u5907\u53ef\u4ee5\u5229\u7528veth pair\u8fdb\u884c\u6865\u63a5\u3002<\/p>\n

<\/a>\u547d\u4ee4\u5b9e\u64cd<\/h2>\n

Linux \u64cd\u4f5cnamespace\u7684\u547d\u4ee4\u662fip netns\u3002<\/p>\n

    \n
  1. [<\/span>root@virtual <\/span>~]#<\/span> ip netns help<\/span><\/code><\/li>\n
  2. Usage<\/span>:<\/span> ip netns list<\/span><\/code><\/li>\n
  3. ip netns add NAME<\/span><\/code><\/li>\n
  4. ip netns <\/span>set<\/span> NAME NETNSID<\/span><\/code><\/li>\n
  5. ip <\/span>[-<\/span>all<\/span>]<\/span> netns <\/span>delete<\/span> [<\/span>NAME<\/span>]<\/span><\/code><\/li>\n
  6. ip netns identify <\/span>[<\/span>PID<\/span>]<\/span><\/code><\/li>\n
  7. ip netns pids NAME<\/span><\/code><\/li>\n
  8. ip <\/span>[-<\/span>all<\/span>]<\/span> netns <\/span>exec<\/span> [<\/span>NAME<\/span>]<\/span> cmd <\/span>...<\/span><\/code><\/li>\n
  9. ip netns monitor<\/span><\/code><\/li>\n
  10. ip netns list<\/span>-<\/span>id<\/span><\/code><\/li>\n
  11. [<\/span>root@virtual <\/span>~]#<\/span><\/code><\/li>\n<\/ol>\n

    \u9996\u5148\u521b\u5efa\u4e00\u4e2anamespace\uff1a<\/p>\n

      \n
    1. # \u67e5\u770bnamespace\u5217\u8868<\/span><\/code><\/li>\n
    2. [<\/span>root@virtual <\/span>~]#<\/span> ip netns list <\/span><\/code><\/li>\n
    3. [<\/span>root@virtual <\/span>~]#<\/span> <\/code><\/li>\n
    4. # \u65b0\u589e namespace ns_test<\/span><\/code><\/li>\n
    5. [<\/span>root@virtual <\/span>~]#<\/span> ip netns add ns_test<\/span><\/code><\/li>\n
    6. [<\/span>root@virtual <\/span>~]#<\/span> <\/code><\/li>\n
    7. [<\/span>root@virtual <\/span>~]#<\/span> ip netns list<\/span><\/code><\/li>\n
    8. ns_test<\/span><\/code><\/li>\n
    9. [<\/span>root@virtual <\/span>~]#<\/span><\/code><\/li>\n<\/ol>\n

      \u5f53\u521b\u5efa\u4e00\u4e2anamespace\u540e\uff0c\u5c31\u53ef\u4ee5\u5c06\u4e00\u4e9b\u865a\u62df\u8bbe\u5907\u8fc1\u79fb\u5230\u8fd9\u4e2anamespace\u4e2d\u53bb\u4e86\uff0c\u6bd4\u5982\u4e0a\u4e00\u7bc7\u4e2d\u4ecb\u7ecd\u7684tap\u3002<\/p>\n

        \n
      1. # \u521b\u5efatap\uff0c\u5e76\u914d\u7f6e\u5bf9\u5e94IP\uff0c\u8be6\u7ec6\u4fe1\u606f\u53ef\u770b\u4e0a\u4e00\u7bc7\u6587\u6863<\/span><\/code><\/li>\n
      2. [<\/span>root@virtual <\/span>~]#<\/span> tunctl <\/span>-<\/span>t tap_test<\/span><\/code><\/li>\n
      3. Set<\/span> 'tap_test'<\/span> persistent <\/span>and<\/span> owned <\/span>by<\/span> uid <\/span>0<\/span><\/code><\/li>\n
      4. [<\/span>root@virtual <\/span>~]#<\/span> ip link list<\/span><\/code><\/li>\n
      5. 1<\/span>:<\/span> lo<\/span>:<\/span> <<\/span>LOOPBACK<\/span>,<\/span>UP<\/span>,<\/span>LOWER_UP<\/span>><\/span> mtu <\/span>65536<\/span> qdisc noqueue state UNKNOWN mode DEFAULT qlen <\/span>1<\/span><\/code><\/li>\n
      6. link<\/span>\/<\/span>loopback <\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span> brd <\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span><\/code><\/li>\n
      7. 2<\/span>:<\/span> eth0<\/span>:<\/span> <<\/span>BROADCAST<\/span>,<\/span>MULTICAST<\/span>,<\/span>UP<\/span>,<\/span>LOWER_UP<\/span>><\/span> mtu <\/span>1500<\/span> qdisc pfifo_fast state UP mode DEFAULT qlen <\/span>1000<\/span><\/code><\/li>\n
      8. link<\/span>\/<\/span>ether fa<\/span>:<\/span>16<\/span>:<\/span>3e<\/span>:<\/span>56<\/span>:<\/span>6a<\/span>:<\/span>87<\/span> brd ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span><\/code><\/li>\n
      9. 3<\/span>:<\/span> tap_test<\/span>:<\/span> <<\/span>BROADCAST<\/span>,<\/span>MULTICAST<\/span>><\/span> mtu <\/span>1500<\/span> qdisc noop state DOWN mode DEFAULT qlen <\/span>1000<\/span><\/code><\/li>\n
      10. link<\/span>\/<\/span>ether <\/span>2e<\/span>:<\/span>5c<\/span>:<\/span>3f<\/span>:<\/span>10<\/span>:<\/span>63<\/span>:<\/span>12<\/span> brd ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span><\/code><\/li>\n
      11. [<\/span>root@virtual <\/span>~]#<\/span> ip addr show<\/span><\/code><\/li>\n
      12. 1<\/span>:<\/span> lo<\/span>:<\/span> <<\/span>LOOPBACK<\/span>,<\/span>UP<\/span>,<\/span>LOWER_UP<\/span>><\/span> mtu <\/span>65536<\/span> qdisc noqueue state UNKNOWN qlen <\/span>1<\/span><\/code><\/li>\n
      13. link<\/span>\/<\/span>loopback <\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span> brd <\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span><\/code><\/li>\n
      14. inet <\/span>127.0<\/span>.<\/span>0.1<\/span>\/<\/span>8<\/span> scope host lo<\/span><\/code><\/li>\n
      15. valid_lft forever preferred_lft forever<\/span><\/code><\/li>\n
      16. inet6 <\/span>::<\/span>1<\/span>\/<\/span>128<\/span> scope host <\/span><\/code><\/li>\n
      17. valid_lft forever preferred_lft forever<\/span><\/code><\/li>\n
      18. 2<\/span>:<\/span> eth0<\/span>:<\/span> <<\/span>BROADCAST<\/span>,<\/span>MULTICAST<\/span>,<\/span>UP<\/span>,<\/span>LOWER_UP<\/span>><\/span> mtu <\/span>1500<\/span> qdisc pfifo_fast state UP qlen <\/span>1000<\/span><\/code><\/li>\n
      19. link<\/span>\/<\/span>ether fa<\/span>:<\/span>16<\/span>:<\/span>3e<\/span>:<\/span>56<\/span>:<\/span>6a<\/span>:<\/span>87<\/span> brd ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span><\/code><\/li>\n
      20. inet <\/span>10.0<\/span>.<\/span>0.176<\/span>\/<\/span>24<\/span> brd <\/span>10.0<\/span>.<\/span>0.255<\/span> scope <\/span>global<\/span> noprefixroute <\/span>dynamic<\/span> eth0<\/span><\/code><\/li>\n
      21. valid_lft <\/span>75898sec<\/span> preferred_lft <\/span>75898sec<\/span><\/code><\/li>\n
      22. inet6 fe80<\/span>::<\/span>f816<\/span>:<\/span>3eff<\/span>:<\/span>fe56<\/span>:<\/span>6a87<\/span>\/<\/span>64<\/span> scope link <\/span><\/code><\/li>\n
      23. valid_lft forever preferred_lft forever<\/span><\/code><\/li>\n
      24. 3<\/span>:<\/span> tap_test<\/span>:<\/span> <<\/span>BROADCAST<\/span>,<\/span>MULTICAST<\/span>><\/span> mtu <\/span>1500<\/span> qdisc noop state DOWN qlen <\/span>1000<\/span><\/code><\/li>\n
      25. link<\/span>\/<\/span>ether <\/span>2e<\/span>:<\/span>5c<\/span>:<\/span>3f<\/span>:<\/span>10<\/span>:<\/span>63<\/span>:<\/span>12<\/span> brd ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span><\/code><\/li>\n
      26. [<\/span>root@virtual <\/span>~]#<\/span> ip addr add <\/span>local<\/span> 10.0<\/span>.<\/span>0.190<\/span>\/<\/span>24<\/span> dev tap_test<\/span><\/code><\/li>\n
      27. [<\/span>root@virtual <\/span>~]#<\/span> ip a show<\/span><\/code><\/li>\n
      28. 1<\/span>:<\/span> lo<\/span>:<\/span> <<\/span>LOOPBACK<\/span>,<\/span>UP<\/span>,<\/span>LOWER_UP<\/span>><\/span> mtu <\/span>65536<\/span> qdisc noqueue state UNKNOWN qlen <\/span>1<\/span><\/code><\/li>\n
      29. link<\/span>\/<\/span>loopback <\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span> brd <\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span><\/code><\/li>\n
      30. inet <\/span>127.0<\/span>.<\/span>0.1<\/span>\/<\/span>8<\/span> scope host lo<\/span><\/code><\/li>\n
      31. valid_lft forever preferred_lft forever<\/span><\/code><\/li>\n
      32. inet6 <\/span>::<\/span>1<\/span>\/<\/span>128<\/span> scope host <\/span><\/code><\/li>\n
      33. valid_lft forever preferred_lft forever<\/span><\/code><\/li>\n
      34. 2<\/span>:<\/span> eth0<\/span>:<\/span> <<\/span>BROADCAST<\/span>,<\/span>MULTICAST<\/span>,<\/span>UP<\/span>,<\/span>LOWER_UP<\/span>><\/span> mtu <\/span>1500<\/span> qdisc pfifo_fast state UP qlen <\/span>1000<\/span><\/code><\/li>\n
      35. link<\/span>\/<\/span>ether fa<\/span>:<\/span>16<\/span>:<\/span>3e<\/span>:<\/span>56<\/span>:<\/span>6a<\/span>:<\/span>87<\/span> brd ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span><\/code><\/li>\n
      36. inet <\/span>10.0<\/span>.<\/span>0.176<\/span>\/<\/span>24<\/span> brd <\/span>10.0<\/span>.<\/span>0.255<\/span> scope <\/span>global<\/span> noprefixroute <\/span>dynamic<\/span> eth0<\/span><\/code><\/li>\n
      37. valid_lft <\/span>75813sec<\/span> preferred_lft <\/span>75813sec<\/span><\/code><\/li>\n
      38. inet6 fe80<\/span>::<\/span>f816<\/span>:<\/span>3eff<\/span>:<\/span>fe56<\/span>:<\/span>6a87<\/span>\/<\/span>64<\/span> scope link <\/span><\/code><\/li>\n
      39. valid_lft forever preferred_lft forever<\/span><\/code><\/li>\n
      40. 3<\/span>:<\/span> tap_test<\/span>:<\/span> <<\/span>BROADCAST<\/span>,<\/span>MULTICAST<\/span>><\/span> mtu <\/span>1500<\/span> qdisc noop state DOWN qlen <\/span>1000<\/span><\/code><\/li>\n
      41. link<\/span>\/<\/span>ether <\/span>2e<\/span>:<\/span>5c<\/span>:<\/span>3f<\/span>:<\/span>10<\/span>:<\/span>63<\/span>:<\/span>12<\/span> brd ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span><\/code><\/li>\n
      42. inet <\/span>10.0<\/span>.<\/span>0.190<\/span>\/<\/span>24<\/span> scope <\/span>global<\/span> tap_test<\/span><\/code><\/li>\n
      43. valid_lft forever preferred_lft forever<\/span><\/code><\/li>\n
      44. [<\/span>root@virtual <\/span>~]#<\/span><\/code><\/li>\n
      45. # \u521b\u5efanamespace\u540e\uff0c\u5c06\u524d\u9762\u521b\u5efa\u7684tap_test\u8fc1\u79fb\u5230\u8fd9\u4e2anamespace\u4e2d\u3002<\/span><\/code><\/li>\n
      46. # \u8fc1\u79fb\u4e4b\u540e\uff0c\u5728\u5916\u76f4\u63a5 ip a s \u5df2\u7ecf\u770b\u4e0d\u5230\u8fd9\u4e2a\u865a\u62df\u8bbe\u5907\u4e86<\/span><\/code><\/li>\n
      47. [<\/span>root@virtual <\/span>~]#<\/span> <\/code><\/li>\n
      48. [<\/span>root@virtual <\/span>~]#<\/span> ip link <\/span>set<\/span> tap_test netns ns_test<\/span><\/code><\/li>\n
      49. [<\/span>root@virtual <\/span>~]#<\/span> <\/code><\/li>\n
      50. [<\/span>root@virtual <\/span>~]#<\/span> ip netns <\/span>exec<\/span> ns_test ip a s<\/span><\/code><\/li>\n
      51. 1<\/span>:<\/span> lo<\/span>:<\/span> <<\/span>LOOPBACK<\/span>><\/span> mtu <\/span>65536<\/span> qdisc noop state DOWN qlen <\/span>1<\/span><\/code><\/li>\n
      52. link<\/span>\/<\/span>loopback <\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span> brd <\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span><\/code><\/li>\n
      53. 3<\/span>:<\/span> tap_test<\/span>:<\/span> <<\/span>BROADCAST<\/span>,<\/span>MULTICAST<\/span>><\/span> mtu <\/span>1500<\/span> qdisc noop state DOWN qlen <\/span>1000<\/span><\/code><\/li>\n
      54. link<\/span>\/<\/span>ether <\/span>2e<\/span>:<\/span>5c<\/span>:<\/span>3f<\/span>:<\/span>10<\/span>:<\/span>63<\/span>:<\/span>12<\/span> brd ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span><\/code><\/li>\n
      55. [<\/span>root@virtual <\/span>~]#<\/span> ip netns <\/span>exec<\/span> ns_test ip addr add <\/span>192.168<\/span>.<\/span>10.190<\/span>\/<\/span>24<\/span> dev tap_test<\/span><\/code><\/li>\n
      56. [<\/span>root@virtual <\/span>~]#<\/span> ip netns <\/span>exec<\/span> ns_test ip a s<\/span><\/code><\/li>\n
      57. 1<\/span>:<\/span> lo<\/span>:<\/span> <<\/span>LOOPBACK<\/span>><\/span> mtu <\/span>65536<\/span> qdisc noop state DOWN qlen <\/span>1<\/span><\/code><\/li>\n
      58. link<\/span>\/<\/span>loopback <\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span> brd <\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span><\/code><\/li>\n
      59. 3<\/span>:<\/span> tap_test<\/span>:<\/span> <<\/span>BROADCAST<\/span>,<\/span>MULTICAST<\/span>><\/span> mtu <\/span>1500<\/span> qdisc noop state DOWN qlen <\/span>1000<\/span><\/code><\/li>\n
      60. link<\/span>\/<\/span>ether <\/span>2e<\/span>:<\/span>5c<\/span>:<\/span>3f<\/span>:<\/span>10<\/span>:<\/span>63<\/span>:<\/span>12<\/span> brd ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span><\/code><\/li>\n
      61. inet <\/span>192.168<\/span>.<\/span>10.190<\/span>\/<\/span>24<\/span> scope <\/span>global<\/span> tap_test<\/span><\/code><\/li>\n
      62. valid_lft forever preferred_lft forever<\/span><\/code><\/li>\n
      63. [<\/span>root@virtual <\/span>~]#<\/span><\/code><\/li>\n<\/ol>\n

        <\/a>veth pair<\/h1>\n

        <\/a>\u524d\u8a00<\/h2>\n

        veth pair \u4e0d\u662f\u4e00\u4e2a\u8bbe\u5907\uff0c\u800c\u662f\u4e00\u5bf9\u8bbe\u5907\uff0c\u4ee5\u8fde\u63a5\u4e24\u4e2a\u865a\u62df\u4ee5\u592a\u7aef\u53e3\u3002\u64cd\u4f5cveth pair\uff0c\u9700\u8981\u8ddfnamespace\u4e00\u8d77\u914d\u5408\uff0c\u4e0d\u7136\u5c31\u6ca1\u6709\u610f\u4e49\u3002<\/p>\n

        \u7b80\u5355\u7684\u62d3\u6251\u56fe\uff1a
        \n\"70\"<\/p>\n

        \u4e24\u4e2anamespace ns1\/ns2 \u4e2d\u5404\u6709\u4e00\u4e2atap\u7ec4\u6210veth pair\uff0c\u4e24\u4e2atap \u4e0a\u914d\u7f6e\u7684ip\u8fdb\u884c\u4e92ping\u3002<\/p>\n

        <\/a>\u547d\u4ee4\u5b9e\u64cd<\/h2>\n
          \n
        1. # \u521b\u5efa veth pair<\/span><\/code><\/li>\n
        2. [<\/span>root@virtual <\/span>~]#<\/span> ip link add tap1 type veth peer name tap2 <\/span><\/code><\/li>\n
        3. [<\/span>root@virtual <\/span>~]#<\/span> ip a s<\/span><\/code><\/li>\n
        4. 1<\/span>:<\/span> lo<\/span>:<\/span> <<\/span>LOOPBACK<\/span>,<\/span>UP<\/span>,<\/span>LOWER_UP<\/span>><\/span> mtu <\/span>65536<\/span> qdisc noqueue state UNKNOWN qlen <\/span>1<\/span><\/code><\/li>\n
        5. link<\/span>\/<\/span>loopback <\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span> brd <\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span><\/code><\/li>\n
        6. inet <\/span>127.0<\/span>.<\/span>0.1<\/span>\/<\/span>8<\/span> scope host lo<\/span><\/code><\/li>\n
        7. valid_lft forever preferred_lft forever<\/span><\/code><\/li>\n
        8. inet6 <\/span>::<\/span>1<\/span>\/<\/span>128<\/span> scope host <\/span><\/code><\/li>\n
        9. valid_lft forever preferred_lft forever<\/span><\/code><\/li>\n
        10. 2<\/span>:<\/span> eth0<\/span>:<\/span> <<\/span>BROADCAST<\/span>,<\/span>MULTICAST<\/span>,<\/span>UP<\/span>,<\/span>LOWER_UP<\/span>><\/span> mtu <\/span>1500<\/span> qdisc pfifo_fast state UP qlen <\/span>1000<\/span><\/code><\/li>\n
        11. link<\/span>\/<\/span>ether fa<\/span>:<\/span>16<\/span>:<\/span>3e<\/span>:<\/span>56<\/span>:<\/span>6a<\/span>:<\/span>87<\/span> brd ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span><\/code><\/li>\n
        12. inet <\/span>10.0<\/span>.<\/span>0.176<\/span>\/<\/span>24<\/span> brd <\/span>10.0<\/span>.<\/span>0.255<\/span> scope <\/span>global<\/span> noprefixroute <\/span>dynamic<\/span> eth0<\/span><\/code><\/li>\n
        13. valid_lft <\/span>64021sec<\/span> preferred_lft <\/span>64021sec<\/span><\/code><\/li>\n
        14. inet6 fe80<\/span>::<\/span>f816<\/span>:<\/span>3eff<\/span>:<\/span>fe56<\/span>:<\/span>6a87<\/span>\/<\/span>64<\/span> scope link <\/span><\/code><\/li>\n
        15. valid_lft forever preferred_lft forever<\/span><\/code><\/li>\n
        16. 6<\/span>:<\/span> tap2@tap1<\/span>:<\/span> <<\/span>BROADCAST<\/span>,<\/span>MULTICAST<\/span>,<\/span>M<\/span>-<\/span>DOWN<\/span>><\/span> mtu <\/span>1500<\/span> qdisc noop state DOWN qlen <\/span>1000<\/span><\/code><\/li>\n
        17. link<\/span>\/<\/span>ether a6<\/span>:<\/span>74<\/span>:<\/span>e9<\/span>:<\/span>cb<\/span>:<\/span>8f<\/span>:<\/span>f1 brd ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span><\/code><\/li>\n
        18. 7<\/span>:<\/span> tap1@tap2<\/span>:<\/span> <<\/span>BROADCAST<\/span>,<\/span>MULTICAST<\/span>,<\/span>M<\/span>-<\/span>DOWN<\/span>><\/span> mtu <\/span>1500<\/span> qdisc noop state DOWN qlen <\/span>1000<\/span><\/code><\/li>\n
        19. link<\/span>\/<\/span>ether <\/span>02<\/span>:<\/span>d1<\/span>:<\/span>8c<\/span>:<\/span>8b<\/span>:<\/span>44<\/span>:<\/span>e9 brd ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span><\/code><\/li>\n
        20. [<\/span>root@virtual <\/span>~]#<\/span> <\/code><\/li>\n
        21. <\/code><\/li>\n
        22. # \u521b\u5efanamespace\uff0c\u5e76\u5c06tap\u8fc1\u79fb\u81f3namespace\u4e2d\uff1a<\/span><\/code><\/li>\n
        23. <\/code><\/li>\n
        24. [<\/span>root@virtual <\/span>~]#<\/span> ip netns add ns1<\/span><\/code><\/li>\n
        25. [<\/span>root@virtual <\/span>~]#<\/span> ip netns add ns2<\/span><\/code><\/li>\n
        26. [<\/span>root@virtual <\/span>~]#<\/span> ip link <\/span>set<\/span> tap1 netns ns1<\/span><\/code><\/li>\n
        27. [<\/span>root@virtual <\/span>~]#<\/span> ip link <\/span>set<\/span> tap2 netns ns2<\/span><\/code><\/li>\n
        28. [<\/span>root@virtual <\/span>~]#<\/span> ip netns <\/span>exec<\/span> ns1 ip addr add <\/span>local<\/span> 192.168<\/span>.<\/span>10.200<\/span>\/<\/span>24<\/span> dev tap1<\/span><\/code><\/li>\n
        29. [<\/span>root@virtual <\/span>~]#<\/span> ip netns <\/span>exec<\/span> ns2 ip addr add <\/span>local<\/span> 192.168<\/span>.<\/span>10.201<\/span>\/<\/span>24<\/span> dev tap2<\/span><\/code><\/li>\n
        30. [<\/span>root@virtual <\/span>~]#<\/span> ip netns <\/span>exec<\/span> ns1 ifconfig tap1 up<\/span><\/code><\/li>\n
        31. [<\/span>root@virtual <\/span>~]#<\/span> ip netns <\/span>exec<\/span> ns2 ifconfig tap2 up<\/span><\/code><\/li>\n
        32. [<\/span>root@virtual <\/span>~]#<\/span> <\/code><\/li>\n
        33. [<\/span>root@virtual <\/span>~]#<\/span> ip link list<\/span><\/code><\/li>\n
        34. 1<\/span>:<\/span> lo<\/span>:<\/span> <<\/span>LOOPBACK<\/span>,<\/span>UP<\/span>,<\/span>LOWER_UP<\/span>><\/span> mtu <\/span>65536<\/span> qdisc noqueue state UNKNOWN mode DEFAULT qlen <\/span>1<\/span><\/code><\/li>\n
        35. link<\/span>\/<\/span>loopback <\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span> brd <\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span><\/code><\/li>\n
        36. 2<\/span>:<\/span> eth0<\/span>:<\/span> <<\/span>BROADCAST<\/span>,<\/span>MULTICAST<\/span>,<\/span>UP<\/span>,<\/span>LOWER_UP<\/span>><\/span> mtu <\/span>1500<\/span> qdisc pfifo_fast state UP mode DEFAULT qlen <\/span>1000<\/span><\/code><\/li>\n
        37. link<\/span>\/<\/span>ether fa<\/span>:<\/span>16<\/span>:<\/span>3e<\/span>:<\/span>56<\/span>:<\/span>6a<\/span>:<\/span>87<\/span> brd ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span><\/code><\/li>\n
        38. [<\/span>root@virtual <\/span>~]#<\/span> ip netns list<\/span><\/code><\/li>\n
        39. ns2<\/span><\/code><\/li>\n
        40. ns1 <\/span>(<\/span>id<\/span>:<\/span> 0<\/span>)<\/span><\/code><\/li>\n
        41. ns_test<\/span><\/code><\/li>\n
        42. [<\/span>root@virtual <\/span>~]#<\/span> <\/code><\/li>\n
        43. [<\/span>root@virtual <\/span>~]#<\/span> ip netns <\/span>exec<\/span> ns1 ping <\/span>192.168<\/span>.<\/span>10.201<\/span><\/code><\/li>\n
        44. PING <\/span>192.168<\/span>.<\/span>10.201<\/span> (<\/span>192.168<\/span>.<\/span>10.201<\/span>)<\/span> 56<\/span>(<\/span>84<\/span>)<\/span> bytes of data<\/span>.<\/span><\/code><\/li>\n
        45. 64<\/span> bytes <\/span>from<\/span> 192.168<\/span>.<\/span>10.201<\/span>:<\/span> icmp_seq<\/span>=<\/span>1<\/span> ttl<\/span>=<\/span>64<\/span> time<\/span>=<\/span>0.028<\/span> ms<\/span><\/code><\/li>\n
        46. 64<\/span> bytes <\/span>from<\/span> 192.168<\/span>.<\/span>10.201<\/span>:<\/span> icmp_seq<\/span>=<\/span>2<\/span> ttl<\/span>=<\/span>64<\/span> time<\/span>=<\/span>0.027<\/span> ms<\/span><\/code><\/li>\n
        47. 64<\/span> bytes <\/span>from<\/span> 192.168<\/span>.<\/span>10.201<\/span>:<\/span> icmp_seq<\/span>=<\/span>3<\/span> ttl<\/span>=<\/span>64<\/span> time<\/span>=<\/span>0.026<\/span> ms<\/span><\/code><\/li>\n
        48. 64<\/span> bytes <\/span>from<\/span> 192.168<\/span>.<\/span>10.201<\/span>:<\/span> icmp_seq<\/span>=<\/span>4<\/span> ttl<\/span>=<\/span>64<\/span> time<\/span>=<\/span>0.023<\/span> ms<\/span><\/code><\/li>\n
        49. ^<\/span>C<\/span><\/code><\/li>\n
        50. ---<\/span> 192.168<\/span>.<\/span>10.201<\/span> ping statistics <\/span>---<\/span><\/code><\/li>\n
        51. 4<\/span> packets transmitted<\/span>,<\/span> 4<\/span> received<\/span>,<\/span> 0<\/span>%<\/span> packet loss<\/span>,<\/span> time <\/span>2999ms<\/span><\/code><\/li>\n
        52. rtt min<\/span>\/<\/span>avg<\/span>\/<\/span>max<\/span>\/<\/span>mdev <\/span>=<\/span> 0.023<\/span>\/<\/span>0.026<\/span>\/<\/span>0.028<\/span>\/<\/span>0.002<\/span> ms<\/span><\/code><\/li>\n
        53. [<\/span>root@virtual <\/span>~]#<\/span> ip netns <\/span>exec<\/span> ns1 ip a<\/span><\/code><\/li>\n
        54. 1<\/span>:<\/span> lo<\/span>:<\/span> <<\/span>LOOPBACK<\/span>><\/span> mtu <\/span>65536<\/span> qdisc noop state DOWN qlen <\/span>1<\/span><\/code><\/li>\n
        55. link<\/span>\/<\/span>loopback <\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span> brd <\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span><\/code><\/li>\n
        56. 7<\/span>:<\/span> tap1@if6<\/span>:<\/span> <<\/span>BROADCAST<\/span>,<\/span>MULTICAST<\/span>,<\/span>UP<\/span>,<\/span>LOWER_UP<\/span>><\/span> mtu <\/span>1500<\/span> qdisc noqueue state UP qlen <\/span>1000<\/span><\/code><\/li>\n
        57. link<\/span>\/<\/span>ether <\/span>02<\/span>:<\/span>d1<\/span>:<\/span>8c<\/span>:<\/span>8b<\/span>:<\/span>44<\/span>:<\/span>e9 brd ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff link<\/span>-<\/span>netnsid <\/span>1<\/span><\/code><\/li>\n
        58. inet <\/span>192.168<\/span>.<\/span>10.200<\/span>\/<\/span>24<\/span> scope <\/span>global<\/span> tap1<\/span><\/code><\/li>\n
        59. valid_lft forever preferred_lft forever<\/span><\/code><\/li>\n
        60. inet6 fe80<\/span>::<\/span>d1<\/span>:<\/span>8cff<\/span>:<\/span>fe8b<\/span>:<\/span>44e9<\/span>\/<\/span>64<\/span> scope link <\/span><\/code><\/li>\n
        61. valid_lft forever preferred_lft forever<\/span><\/code><\/li>\n
        62. [<\/span>root@virtual <\/span>~]#<\/span> ip netns <\/span>exec<\/span> ns2 ip a s<\/span><\/code><\/li>\n
        63. 1<\/span>:<\/span> lo<\/span>:<\/span> <<\/span>LOOPBACK<\/span>><\/span> mtu <\/span>65536<\/span> qdisc noop state DOWN qlen <\/span>1<\/span><\/code><\/li>\n
        64. link<\/span>\/<\/span>loopback <\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span> brd <\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span>:<\/span>00<\/span><\/code><\/li>\n
        65. 6<\/span>:<\/span> tap2@if7<\/span>:<\/span> <<\/span>BROADCAST<\/span>,<\/span>MULTICAST<\/span>,<\/span>UP<\/span>,<\/span>LOWER_UP<\/span>><\/span> mtu <\/span>1500<\/span> qdisc noqueue state UP qlen <\/span>1000<\/span><\/code><\/li>\n
        66. link<\/span>\/<\/span>ether a6<\/span>:<\/span>74<\/span>:<\/span>e9<\/span>:<\/span>cb<\/span>:<\/span>8f<\/span>:<\/span>f1 brd ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff<\/span>:<\/span>ff link<\/span>-<\/span>netnsid <\/span>0<\/span><\/code><\/li>\n
        67. inet <\/span>192.168<\/span>.<\/span>10.201<\/span>\/<\/span>24<\/span> scope <\/span>global<\/span> tap2<\/span><\/code><\/li>\n
        68. valid_lft forever preferred_lft forever<\/span><\/code><\/li>\n
        69. inet6 fe80<\/span>::<\/span>a474<\/span>:<\/span>e9ff<\/span>:<\/span>fecb<\/span>:<\/span>8ff1<\/span>\/<\/span>64<\/span> scope link <\/span><\/code><\/li>\n
        70. valid_lft forever preferred_lft forever<\/span><\/code><\/li>\n
        71. [<\/span>root@virtual <\/span>~]#<\/span><\/code><\/li>\n<\/ol>\n

          \u901a\u8fc7\u4ee5\u4e0a\u7684\u6d4b\u8bd5\u7528\u4f8b\uff0c\u53ef\u4ee5\u4e86\u89e3\u901a\u8fc7veth pair\u8fde\u63a5\u4e24\u4e2anamespace\u7684\u65b9\u6cd5\u3002<\/p>\n

          \u540e\u9762\u4f1a\u6709\u4f9d\u9760Bridge\/Switch \u5b9e\u73b0\u4e09\u4e2a\u6216\u591a\u4e2anamespace\u8fdb\u884c\u4e92\u901a\u3002<\/p>\n

          <\/a>Bridge<\/h1>\n

          <\/a>\u524d\u8a00<\/h2>\n

          \u5728Linux\u7684\u8bed\u5883\u4e2d\uff0cBridge\u548cSwitch\u662f\u4e00\u4e2a\u6982\u5ff5\u3002Bridge\u662f\u4e00\u4e2a\u865a\u62df\u7f51\u7edc\u8bbe\u5907\uff0c\u6240\u4ee5\u5177\u6709\u7f51\u7edc\u8bbe\u5907\u7684\u7279\u5f81\uff0c\u53ef\u4ee5\u914d\u7f6eIP\u3001MAC\u5730\u5740\u7b49\uff1bBridge\u662f\u4e00\u4e2a\u865a\u62df\u4ea4\u6362\u673a\uff0c\u548c\u7269\u7406\u4ea4\u6362\u673a\u6709\u7c7b\u4f3c\u7684\u529f\u80fd\u3002\u5bf9\u4e8e\u666e\u901a\u7684\u7f51\u7edc\u8bbe\u5907\u6765\u8bf4\uff0c\u53ea\u6709\u4e24\u7aef\uff0c\u4ece\u4e00\u7aef\u8fdb\u6765\u7684\u6570\u636e\u4f1a\u4ece\u53e6\u4e00\u7aef\u51fa\u53bb\uff0c\u5982\u7269\u7406\u7f51\u5361\u4ece\u5916\u9762\u7f51\u7edc\u4e2d\u6536\u5230\u7684\u6570\u636e\u4f1a\u8f6c\u53d1\u7ed9\u5185\u6838\u534f\u8bae\u6808\uff0c\u800c\u4ece\u534f\u8bae\u6808\u8fc7\u6765\u7684\u6570\u636e\u4f1a\u8f6c\u53d1\u5230\u5916\u9762\u7684\u7269\u7406\u7f51\u7edc\u4e2d\u3002 \u800cBridge\u4e0d\u540c\uff0cBridge\u6709\u591a\u4e2a\u7aef\u53e3\uff0c\u6570\u636e\u53ef\u4ee5\u4ece\u4efb\u4f55\u7aef\u53e3\u8fdb\u6765\uff0c\u8fdb\u6765\u4e4b\u540e\u4ece\u54ea\u4e2a\u53e3\u51fa\u53bb\u548c\u7269\u7406\u4ea4\u6362\u673a\u7684\u539f\u7406\u5dee\u4e0d\u591a\uff0c\u8981\u770bmac\u5730\u5740\u3002<\/p>\n

          <\/a>\u547d\u4ee4\u5b9e\u64cd<\/h2>\n

          Linux\u5b9e\u73b0Bridge\u529f\u80fd\u662fbrctl\u6a21\u5757\u3002\u53ef\u4ee5\u76f4\u63a5\u5728\u547d\u4ee4\u884c\u4e0a\u67e5\u770b\uff0c\u5982\u679c\u6ca1\u6709\u56de\u663e\u7684\u8bdd\uff0c\u53ef\u76f4\u63a5\u4f7f\u7528yum\u8fdb\u884c\u5b89\u88c5\u3002<\/p>\n

            \n
          1. [<\/span>root@virtual <\/span>~]#<\/span> brctl<\/span><\/code><\/li>\n
          2. -<\/span>bash<\/span>:<\/span> brctl<\/span>:<\/span> command <\/span>not<\/span> found<\/span><\/code><\/li>\n
          3. [<\/span>root@virtual <\/span>~]#<\/span> yum <\/span>-<\/span>y install bridge<\/span>-<\/span>utils<\/span><\/code><\/li>\n
          4. Loaded<\/span> plugins<\/span>:<\/span> fastestmirror<\/span><\/code><\/li>\n
          5. Loading<\/span> mirror speeds <\/span>from<\/span> cached hostfile<\/span><\/code><\/li>\n
          6. ......<\/span><\/code><\/li>\n
          7. Running<\/span> transaction<\/span><\/code><\/li>\n
          8. Installing<\/span> :<\/span> bridge<\/span>-<\/span>utils<\/span>-<\/span>1.5<\/span>-<\/span>9.el7.x86<\/span>_64 <\/span>1<\/span>\/<\/span>1<\/span> <\/code><\/li>\n
          9. Verifying<\/span> :<\/span> bridge<\/span>-<\/span>utils<\/span>-<\/span>1.5<\/span>-<\/span>9.el7.x86<\/span>_64 <\/span>1<\/span>\/<\/span>1<\/span> <\/code><\/li>\n
          10. <\/code><\/li>\n
          11. Installed<\/span>:<\/span><\/code><\/li>\n
          12. bridge<\/span>-<\/span>utils<\/span>.<\/span>x86_64 <\/span>0<\/span>:<\/span>1.5<\/span>-<\/span>9.el7<\/span> <\/code><\/li>\n
          13. <\/code><\/li>\n
          14. Complete<\/span>!<\/span><\/code><\/li>\n
          15. [<\/span>root@virtual <\/span>~]#<\/span> brctl<\/span><\/code><\/li>\n
          16. Usage<\/span>:<\/span> brctl <\/span>[<\/span>commands<\/span>]<\/span><\/code><\/li>\n
          17. commands<\/span>:<\/span><\/code><\/li>\n
          18. addbr <\/span><bridge><\/span> add bridge<\/span><\/code><\/li>\n
          19. delbr <\/span><bridge><\/span> delete<\/span> bridge<\/span><\/code><\/li>\n
          20. addif <\/span><bridge><\/span> <device><\/span> add <\/span>interface<\/span> to bridge<\/span><\/code><\/li>\n
          21. delif <\/span><bridge><\/span> <device><\/span> delete<\/span> interface<\/span> from<\/span> bridge<\/span><\/code><\/li>\n
          22. hairpin <\/span><bridge><\/span> <port><\/span> {<\/span><\/code><\/li>\n
          23. on<\/span>|<\/span>off<\/span>}<\/span> turn hairpin on<\/span>\/<\/span>off<\/span><\/code><\/li>\n
          24. setageing <\/span><bridge><\/span> <time><\/span> set<\/span> ageing time<\/span><\/code><\/li>\n
          25. setbridgeprio <\/span><bridge><\/span> <prio><\/span> set<\/span> bridge priority<\/span><\/code><\/li>\n
          26. setfd <\/span><bridge><\/span> <time><\/span> set<\/span> bridge forward delay<\/span><\/code><\/li>\n
          27. sethello <\/span><bridge><\/span> <time><\/span> set<\/span> hello time<\/span><\/code><\/li>\n
          28. setmaxage <\/span><bridge><\/span> <time><\/span> set<\/span> max message age<\/span><\/code><\/li>\n
          29. setpathcost <\/span><bridge><\/span> <port><\/span> <cost><\/span> set<\/span> path cost<\/span><\/code><\/li>\n
          30. setportprio <\/span><bridge><\/span> <port><\/span> <prio><\/span> set<\/span> port priority<\/span><\/code><\/li>\n
          31. show <\/span>[<\/span> <bridge><\/span> ]<\/span> show a list of bridges<\/span><\/code><\/li>\n
          32. showmacs <\/span><bridge><\/span> show a list of mac addrs<\/span><\/code><\/li>\n
          33. showstp <\/span><bridge><\/span> show bridge stp info<\/span><\/code><\/li>\n
          34. stp <\/span><bridge><\/span> {<\/span><\/code><\/li>\n
          35. on<\/span>|<\/span>off<\/span>}<\/span> turn stp on<\/span>\/<\/span>off<\/span><\/code><\/li>\n
          36. [<\/span>root@virtual <\/span>~]#<\/span><\/code><\/li>\n<\/ol>\n

            \u6839\u636e\u5982\u4e0b\u62d3\u6251\u56fe\uff0c\u6211\u4eec\u6a21\u62df\u521b\u5efa\u76f8\u5e94\u7684\u865a\u62df\u7f51\u7edc\u8bbe\u5907\uff0c\u8fdb\u884c\u5b9e\u73b0\uff1a<\/p>\n

            \u62d3\u6251\u56fe\uff1a
            \n\"70<\/p>\n

            \u547d\u4ee4\u64cd\u4f5c\uff1a<\/p>\n

              \n
            1. # \u521b\u5efa\u5bf9\u4e8e\u8bbe\u5907<\/span><\/code><\/li>\n
            2. [<\/span>root@virtual <\/span>~]#<\/span> ip link add tap1 type veth peer name tap1_peer<\/span><\/code><\/li>\n
            3. [<\/span>root@virtual <\/span>~]#<\/span> ip link add tap2 type veth peer name tap2_peer<\/span><\/code><\/li>\n
            4. [<\/span>root@virtual <\/span>~]#<\/span> ip link add tap3 type veth peer name tap3_peer<\/span><\/code><\/li>\n
            5. [<\/span>root@virtual <\/span>~]#<\/span> ip link add tap4 type veth peer name tap4_peer<\/span><\/code><\/li>\n
            6. [<\/span>root@virtual <\/span>~]#<\/span> <\/code><\/li>\n
            7. [<\/span>root@virtual <\/span>~]#<\/span> ip a s <\/span>|<\/span> grep tap<\/span><\/code><\/li>\n
            8. 8<\/span>:<\/span> tap1_peer@tap1<\/span>:<\/span> <<\/span>BROADCAST<\/span>,<\/span>MULTICAST<\/span>,<\/span>M<\/span>-<\/span>DOWN<\/span>><\/span> mtu <\/span>1500<\/span> qdisc noop state DOWN qlen <\/span>1000<\/span><\/code><\/li>\n
            9. 9<\/span>:<\/span> tap1@tap1_peer<\/span>:<\/span> <<\/span>BROADCAST<\/span>,<\/span>MULTICAST<\/span>,<\/span>M<\/span>-<\/span>DOWN<\/span>><\/span> mtu <\/span>1500<\/span> qdisc noop state DOWN qlen <\/span>1000<\/span><\/code><\/li>\n
            10. 10<\/span>:<\/span> tap2_peer@tap2<\/span>:<\/span> <<\/span>BROADCAST<\/span>,<\/span>MULTICAST<\/span>,<\/span>M<\/span>-<\/span>DOWN<\/span>><\/span> mtu <\/span>1500<\/span> qdisc noop state DOWN qlen <\/span>1000<\/span><\/code><\/li>\n
            11. 11<\/span>:<\/span> tap2@tap2_peer<\/span>:<\/span> <<\/span>BROADCAST<\/span>,<\/span>MULTICAST<\/span>,<\/span>M<\/span>-<\/span>DOWN<\/span>><\/span> mtu <\/span>1500<\/span> qdisc noop state DOWN qlen <\/span>1000<\/span><\/code><\/li>\n
            12. 12<\/span>:<\/span> tap3_peer@tap3<\/span>:<\/span> <<\/span>BROADCAST<\/span>,<\/span>MULTICAST<\/span>,<\/span>M<\/span>-<\/span>DOWN<\/span>><\/span> mtu <\/span>1500<\/span> qdisc noop state DOWN qlen <\/span>1000<\/span><\/code><\/li>\n
            13. 13<\/span>:<\/span> tap3@tap3_peer<\/span>:<\/span> <<\/span>BROADCAST<\/span>,<\/span>MULTICAST<\/span>,<\/span>M<\/span>-<\/span>DOWN<\/span>><\/span> mtu <\/span>1500<\/span> qdisc noop state DOWN qlen <\/span>1000<\/span><\/code><\/li>\n
            14. 14<\/span>:<\/span> tap4_peer@tap4<\/span>:<\/span> <<\/span>BROADCAST<\/span>,<\/span>MULTICAST<\/span>,<\/span>M<\/span>-<\/span>DOWN<\/span>><\/span> mtu <\/span>1500<\/span> qdisc noop state DOWN qlen <\/span>1000<\/span><\/code><\/li>\n
            15. 15<\/span>:<\/span> tap4@tap4_peer<\/span>:<\/span> <<\/span>BROADCAST<\/span>,<\/span>MULTICAST<\/span>,<\/span>M<\/span>-<\/span>DOWN<\/span>><\/span> mtu <\/span>1500<\/span> qdisc noop state DOWN qlen <\/span>1000<\/span><\/code><\/li>\n
            16. [<\/span>root@virtual <\/span>~]#<\/span> <\/code><\/li>\n
            17. [<\/span>root@virtual <\/span>~]#<\/span> ip netns list<\/span><\/code><\/li>\n
            18. ns_test<\/span><\/code><\/li>\n
            19. [<\/span>root@virtual <\/span>~]#<\/span> ip netns add ns1<\/span><\/code><\/li>\n
            20. [<\/span>root@virtual <\/span>~]#<\/span> ip netns add ns2<\/span><\/code><\/li>\n
            21. [<\/span>root@virtual <\/span>~]#<\/span> ip netns add ns3<\/span><\/code><\/li>\n
            22. [<\/span>root@virtual <\/span>~]#<\/span> ip netns add ns4<\/span><\/code><\/li>\n
            23. [<\/span>root@virtual <\/span>~]#<\/span> ip netns list<\/span><\/code><\/li>\n
            24. ns4<\/span><\/code><\/li>\n
            25. ns3<\/span><\/code><\/li>\n
            26. ns2<\/span><\/code><\/li>\n
            27. ns1<\/span><\/code><\/li>\n
            28. ns_test<\/span><\/code><\/li>\n
            29. [<\/span>root@virtual <\/span>~]#<\/span> <\/code><\/li>\n
            30. # \u5c06\u8bbe\u5907\u8fc1\u79fb\u81f3namespace<\/span><\/code><\/li>\n
            31. [<\/span>root@virtual <\/span>~]#<\/span> ip link <\/span>set<\/span> tap1 netns ns1<\/span><\/code><\/li>\n
            32. [<\/span>root@virtual <\/span>~]#<\/span> ip link <\/span>set<\/span> tap2 netns ns2<\/span><\/code><\/li>\n
            33. [<\/span>root@virtual <\/span>~]#<\/span> ip link <\/span>set<\/span> tap3 netns ns3<\/span><\/code><\/li>\n
            34. [<\/span>root@virtual <\/span>~]#<\/span> ip link <\/span>set<\/span> tap4 netns ns4<\/span><\/code><\/li>\n
            35. [<\/span>root@virtual <\/span>~]#<\/span> <\/code><\/li>\n
            36. # \u521b\u5efa Bridge<\/span><\/code><\/li>\n
            37. [<\/span>root@virtual <\/span>~]#<\/span> brctl addbr br1<\/span><\/code><\/li>\n
            38. [<\/span>root@virtual <\/span>~]#<\/span> ip a s <\/span>|<\/span> grep br1<\/span><\/code><\/li>\n
            39. 17<\/span>:<\/span> br1<\/span>:<\/span> <<\/span>BROADCAST<\/span>,<\/span>MULTICAST<\/span>><\/span> mtu <\/span>1500<\/span> qdisc noop state DOWN qlen <\/span>1000<\/span><\/code><\/li>\n
            40. [<\/span>root@virtual <\/span>~]#<\/span> <\/code><\/li>\n
            41. # \u5c06tap \u6dfb\u52a0\u5230 Bridge\u4e2d<\/span><\/code><\/li>\n
            42. [<\/span>root@virtual <\/span>~]#<\/span> brctl addif br1 tap1_peer<\/span><\/code><\/li>\n
            43. [<\/span>root@virtual <\/span>~]#<\/span> brctl addif br1 tap2_peer<\/span><\/code><\/li>\n
            44. [<\/span>root@virtual <\/span>~]#<\/span> brctl addif br1 tap3_beer<\/span><\/code><\/li>\n
            45. interface<\/span> tap3_beer does <\/span>not<\/span> exist<\/span>!<\/span><\/code><\/li>\n
            46. [<\/span>root@virtual <\/span>~]#<\/span> brctl addif br1 tap3_peer<\/span><\/code><\/li>\n
            47. [<\/span>root@virtual <\/span>~]#<\/span> brctl addif br1 tap4_peer<\/span><\/code><\/li>\n
            48. [<\/span>root@virtual <\/span>~]#<\/span> <\/code><\/li>\n
            49. # \u914d\u7f6e tap \u5bf9\u5e94\u7684ip\u5730\u5740<\/span><\/code><\/li>\n
            50. [<\/span>root@virtual <\/span>~]#<\/span> ip netns <\/span>exec<\/span> ns1 ip addr add <\/span>local<\/span> 192.168<\/span>.<\/span>10.200<\/span>\/<\/span>24<\/span> dev tap1<\/span><\/code><\/li>\n
            51. [<\/span>root@virtual <\/span>~]#<\/span> ip netns <\/span>exec<\/span> ns2 ip addr add <\/span>local<\/span> 192.168<\/span>.<\/span>10.201<\/span>\/<\/span>24<\/span> dev tap2<\/span><\/code><\/li>\n
            52. [<\/span>root@virtual <\/span>~]#<\/span> ip netns <\/span>exec<\/span> ns3 ip addr add <\/span>local<\/span> 192.168<\/span>.<\/span>10.202<\/span>\/<\/span>24<\/span> dev tap3<\/span><\/code><\/li>\n
            53. [<\/span>root@virtual <\/span>~]#<\/span> ip netns <\/span>exec<\/span> ns4 ip addr add <\/span>local<\/span> 192.168<\/span>.<\/span>10.203<\/span>\/<\/span>24<\/span> dev tap4<\/span><\/code><\/li>\n
            54. [<\/span>root@virtual <\/span>~]#<\/span> <\/code><\/li>\n
            55. # \u5c06 Bridge \u4ee5\u53ca\u6240\u6709 tap \u72b6\u6001\u8bbe\u7f6e\u4e3a up<\/span><\/code><\/li>\n
            56. [<\/span>root@virtual <\/span>~]#<\/span> ip link <\/span>set<\/span> br1 up<\/span><\/code><\/li>\n
            57. [<\/span>root@virtual <\/span>~]#<\/span> ip link <\/span>set<\/span> tap1_peer up<\/span><\/code><\/li>\n
            58. [<\/span>root@virtual <\/span>~]#<\/span> ip link <\/span>set<\/span> tap2_peer up<\/span><\/code><\/li>\n
            59. [<\/span>root@virtual <\/span>~]#<\/span> ip link <\/span>set<\/span> tap3_peer up<\/span><\/code><\/li>\n
            60. [<\/span>root@virtual <\/span>~]#<\/span> ip link <\/span>set<\/span> tap4_peer up<\/span><\/code><\/li>\n
            61. [<\/span>root@virtual <\/span>~]#<\/span> ip netns <\/span>exec<\/span> ns1 ip link <\/span>set<\/span> tap1 up<\/span><\/code><\/li>\n
            62. [<\/span>root@virtual <\/span>~]#<\/span> ip netns <\/span>exec<\/span> ns2 ip link <\/span>set<\/span> tap2 up<\/span><\/code><\/li>\n
            63. [<\/span>root@virtual <\/span>~]#<\/span> ip netns <\/span>exec<\/span> ns3 ip link <\/span>set<\/span> tap3 up<\/span><\/code><\/li>\n
            64. [<\/span>root@virtual <\/span>~]#<\/span> ip netns <\/span>exec<\/span> ns4 ip link <\/span>set<\/span> tap4 up<\/span><\/code><\/li>\n
            65. [<\/span>root@virtual <\/span>~]#<\/span> <\/code><\/li>\n
            66. # \u76f8\u4e92\u8fdb\u884cip \u4e92ping \uff0c\u9a8c\u8bc1\u7f51\u7edc\u8fde\u901a<\/span><\/code><\/li>\n
            67. [<\/span>root@virtual <\/span>~]#<\/span> ip netns <\/span>exec<\/span> ns1 ping <\/span>192.168<\/span>.<\/span>10.201<\/span><\/code><\/li>\n
            68. PING <\/span>192.168<\/span>.<\/span>10.201<\/span> (<\/span>192.168<\/span>.<\/span>10.201<\/span>)<\/span> 56<\/span>(<\/span>84<\/span>)<\/span> bytes of data<\/span>.<\/span><\/code><\/li>\n
            69. 64<\/span> bytes <\/span>from<\/span> 192.168<\/span>.<\/span>10.201<\/span>:<\/span> icmp_seq<\/span>=<\/span>1<\/span> ttl<\/span>=<\/span>64<\/span> time<\/span>=<\/span>0.041<\/span> ms<\/span><\/code><\/li>\n
            70. 64<\/span> bytes <\/span>from<\/span> 192.168<\/span>.<\/span>10.201<\/span>:<\/span> icmp_seq<\/span>=<\/span>2<\/span> ttl<\/span>=<\/span>64<\/span> time<\/span>=<\/span>0.032<\/span> ms<\/span><\/code><\/li>\n
            71. 64<\/span> bytes <\/span>from<\/span> 192.168<\/span>.<\/span>10.201<\/span>:<\/span> icmp_seq<\/span>=<\/span>3<\/span> ttl<\/span>=<\/span>64<\/span> time<\/span>=<\/span>0.031<\/span> ms<\/span><\/code><\/li>\n
            72. 64<\/span> bytes <\/span>from<\/span> 192.168<\/span>.<\/span>10.201<\/span>:<\/span> icmp_seq<\/span>=<\/span>4<\/span> ttl<\/span>=<\/span>64<\/span> time<\/span>=<\/span>0.027<\/span> ms<\/span><\/code><\/li>\n
            73. ^<\/span>C<\/span><\/code><\/li>\n
            74. ---<\/span> 192.168<\/span>.<\/span>10.201<\/span> ping statistics <\/span>---<\/span><\/code><\/li>\n
            75. 4<\/span> packets transmitted<\/span>,<\/span> 4<\/span> received<\/span>,<\/span> 0<\/span>%<\/span> packet loss<\/span>,<\/span> time <\/span>2999ms<\/span><\/code><\/li>\n
            76. rtt min<\/span>\/<\/span>avg<\/span>\/<\/span>max<\/span>\/<\/span>mdev <\/span>=<\/span> 0.027<\/span>\/<\/span>0.032<\/span>\/<\/span>0.041<\/span>\/<\/span>0.008<\/span> ms<\/span><\/code><\/li>\n
            77. [<\/span>root@virtual <\/span>~]#<\/span> ip netns <\/span>exec<\/span> ns1 ping <\/span>192.168<\/span>.<\/span>10.202<\/span><\/code><\/li>\n
            78. PING <\/span>192.168<\/span>.<\/span>10.202<\/span> (<\/span>192.168<\/span>.<\/span>10.202<\/span>)<\/span> 56<\/span>(<\/span>84<\/span>)<\/span> bytes of data<\/span>.<\/span><\/code><\/li>\n
            79. 64<\/span> bytes <\/span>from<\/span> 192.168<\/span>.<\/span>10.202<\/span>:<\/span> icmp_seq<\/span>=<\/span>1<\/span> ttl<\/span>=<\/span>64<\/span> time<\/span>=<\/span>0.041<\/span> ms<\/span><\/code><\/li>\n
            80. 64<\/span> bytes <\/span>from<\/span> 192.168<\/span>.<\/span>10.202<\/span>:<\/span> icmp_seq<\/span>=<\/span>2<\/span> ttl<\/span>=<\/span>64<\/span> time<\/span>=<\/span>0.033<\/span> ms<\/span><\/code><\/li>\n
            81. 64<\/span> bytes <\/span>from<\/span> 192.168<\/span>.<\/span>10.202<\/span>:<\/span> icmp_seq<\/span>=<\/span>3<\/span> ttl<\/span>=<\/span>64<\/span> time<\/span>=<\/span>0.037<\/span> ms<\/span><\/code><\/li>\n
            82. 64<\/span> bytes <\/span>from<\/span> 192.168<\/span>.<\/span>10.202<\/span>:<\/span> icmp_seq<\/span>=<\/span>4<\/span> ttl<\/span>=<\/span>64<\/span> time<\/span>=<\/span>0.027<\/span> ms<\/span><\/code><\/li>\n
            83. ^<\/span>C<\/span><\/code><\/li>\n
            84. ---<\/span> 192.168<\/span>.<\/span>10.202<\/span> ping statistics <\/span>---<\/span><\/code><\/li>\n
            85. 4<\/span> packets transmitted<\/span>,<\/span> 4<\/span> received<\/span>,<\/span> 0<\/span>%<\/span> packet loss<\/span>,<\/span> time <\/span>2999ms<\/span><\/code><\/li>\n
            86. rtt min<\/span>\/<\/span>avg<\/span>\/<\/span>max<\/span>\/<\/span>mdev <\/span>=<\/span> 0.027<\/span>\/<\/span>0.034<\/span>\/<\/span>0.041<\/span>\/<\/span>0.007<\/span> ms<\/span><\/code><\/li>\n
            87. [<\/span>root@virtual <\/span>~]#<\/span> ip netns <\/span>exec<\/span> ns1 ping <\/span>192.168<\/span>.<\/span>10.203<\/span><\/code><\/li>\n
            88. PING <\/span>192.168<\/span>.<\/span>10.203<\/span> (<\/span>192.168<\/span>.<\/span>10.203<\/span>)<\/span> 56<\/span>(<\/span>84<\/span>)<\/span> bytes of data<\/span>.<\/span><\/code><\/li>\n
            89. 64<\/span> bytes <\/span>from<\/span> 192.168<\/span>.<\/span>10.203<\/span>:<\/span> icmp_seq<\/span>=<\/span>1<\/span> ttl<\/span>=<\/span>64<\/span> time<\/span>=<\/span>0.059<\/span> ms<\/span><\/code><\/li>\n
            90. 64<\/span> bytes <\/span>from<\/span> 192.168<\/span>.<\/span>10.203<\/span>:<\/span> icmp_seq<\/span>=<\/span>2<\/span> ttl<\/span>=<\/span>64<\/span> time<\/span>=<\/span>0.027<\/span> ms<\/span><\/code><\/li>\n
            91. 64<\/span> bytes <\/span>from<\/span> 192.168<\/span>.<\/span>10.203<\/span>:<\/span> icmp_seq<\/span>=<\/span>3<\/span> ttl<\/span>=<\/span>64<\/span> time<\/span>=<\/span>0.033<\/span> ms<\/span><\/code><\/li>\n
            92. 64<\/span> bytes <\/span>from<\/span> 192.168<\/span>.<\/span>10.203<\/span>:<\/span> icmp_seq<\/span>=<\/span>4<\/span> ttl<\/span>=<\/span>64<\/span> time<\/span>=<\/span>0.031<\/span> ms<\/span><\/code><\/li>\n
            93. ^<\/span>C<\/span><\/code><\/li>\n
            94. ---<\/span> 192.168<\/span>.<\/span>10.203<\/span> ping statistics <\/span>---<\/span><\/code><\/li>\n
            95. 4<\/span> packets transmitted<\/span>,<\/span> 4<\/span> received<\/span>,<\/span> 0<\/span>%<\/span> packet loss<\/span>,<\/span> time <\/span>2999ms<\/span><\/code><\/li>\n
            96. rtt min<\/span>\/<\/span>avg<\/span>\/<\/span>max<\/span>\/<\/span>mdev <\/span>=<\/span> 0.027<\/span>\/<\/span>0.037<\/span>\/<\/span>0.059<\/span>\/<\/span>0.014<\/span> ms<\/span><\/code><\/li>\n
            97. [<\/span>root@virtual <\/span>~]#<\/span> <\/code><\/li>\n
            98. [<\/span>root@virtual <\/span>~]#<\/span> ip netns <\/span>exec<\/span> ns4 ping <\/span>192.168<\/span>.<\/span>10.200<\/span><\/code><\/li>\n
            99. PING <\/span>192.168<\/span>.<\/span>10.200<\/span> (<\/span>192.168<\/span>.<\/span>10.200<\/span>)<\/span> 56<\/span>(<\/span>84<\/span>)<\/span> bytes of data<\/span>.<\/span><\/code><\/li>\n
            100. 64<\/span> bytes <\/span>from<\/span> 192.168<\/span>.<\/span>10.200<\/span>:<\/span> icmp_seq<\/span>=<\/span>1<\/span> ttl<\/span>=<\/span>64<\/span> time<\/span>=<\/span>0.022<\/span> ms<\/span><\/code><\/li>\n
            101. 64<\/span> bytes <\/span>from<\/span> 192.168<\/span>.<\/span>10.200<\/span>:<\/span> icmp_seq<\/span>=<\/span>2<\/span> ttl<\/span>=<\/span>64<\/span> time<\/span>=<\/span>0.024<\/span> ms<\/span><\/code><\/li>\n
            102. 64<\/span> bytes <\/span>from<\/span> 192.168<\/span>.<\/span>10.200<\/span>:<\/span> icmp_seq<\/span>=<\/span>3<\/span> ttl<\/span>=<\/span>64<\/span> time<\/span>=<\/span>0.033<\/span> ms<\/span><\/code><\/li>\n
            103. 64<\/span> bytes <\/span>from<\/span> 192.168<\/span>.<\/span>10.200<\/span>:<\/span> icmp_seq<\/span>=<\/span>4<\/span> ttl<\/span>=<\/span>64<\/span> time<\/span>=<\/span>0.030<\/span> ms<\/span><\/code><\/li>\n
            104. ^<\/span>X<\/span>^<\/span>C<\/span><\/code><\/li>\n
            105. ---<\/span> 192.168<\/span>.<\/span>10.200<\/span> ping statistics <\/span>---<\/span><\/code><\/li>\n
            106. 4<\/span> packets transmitted<\/span>,<\/span> 4<\/span> received<\/span>,<\/span> 0<\/span>%<\/span> packet loss<\/span>,<\/span> time <\/span>2999ms<\/span><\/code><\/li>\n
            107. rtt min<\/span>\/<\/span>avg<\/span>\/<\/span>max<\/span>\/<\/span>mdev <\/span>=<\/span> 0.022<\/span>\/<\/span>0.027<\/span>\/<\/span>0.033<\/span>\/<\/span>0.005<\/span> ms<\/span><\/code><\/li>\n
            108. [<\/span>root@virtual <\/span>~]#<\/span><\/code><\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

              namespace \u524d\u8a00 namespace\u662fLinux\u865a\u62df\u7f51\u7edc\u7684\u4e00\u4e2a\u91cd\u8981\u6982\u5ff5\uff0c\u4f20\u7edf\u7684Linux\u7684\u8bb8\u591a\u8d44\u6e90\u662f\u5168\u5c40\u7684\uff0c\u5982\u679c\u8fdb\u7a0bid\u8d44\u6e90\u3002\u800cnamespace\u7684\u76ee\u7684\u9996\u5148\u5c31\u662f\u8bb2\u8fd9\u4e9b\u8d44\u6e90\u505a\u8d44\u6e90\u9694\u79bb\u3002Linux\u53ef\u4ee5\u5728\u4e00\u4e2aHost\u5185\u521b\u5efa\u8bb8\u591anamesp […]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,8],"tags":[],"topic":[37,40],"class_list":["post-370","post","type-post","status-publish","format-standard","hentry","category-linux","category-8","topic-linux","topic-40"],"_links":{"self":[{"href":"https:\/\/idc.birk.cn\/index.php?rest_route=\/wp\/v2\/posts\/370","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.birk.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.birk.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.birk.cn\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.birk.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=370"}],"version-history":[{"count":1,"href":"https:\/\/idc.birk.cn\/index.php?rest_route=\/wp\/v2\/posts\/370\/revisions"}],"predecessor-version":[{"id":373,"href":"https:\/\/idc.birk.cn\/index.php?rest_route=\/wp\/v2\/posts\/370\/revisions\/373"}],"wp:attachment":[{"href":"https:\/\/idc.birk.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=370"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.birk.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=370"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.birk.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=370"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/idc.birk.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftopic&post=370"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}