小编zac*_*ern的帖子

我在 Linux 上从来没有完全理解的一件事是，本地流量会发生什么，而不是针对环回。

例如，给定以下网络设置：

[root@pe-323-master ~]# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0C:29:2B:59:85
          inet addr:172.16.90.133  Bcast:172.16.90.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe2b:5985/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1881 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1205 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:234047 (228.5 KiB)  TX bytes:134389 (131.2 KiB)

eth1      Link encap:Ethernet  HWaddr 00:0C:29:2B:59:8F
          inet addr:10.20.2.2  Bcast:10.20.2.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe2b:598f/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:77 errors:0 dropped:0 overruns:0 frame:0
          TX packets:18 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 …