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看了http://linux.chinaunix.net/bbs/v ... p;page=5&extra= 大家的讨论,刚好有个问题想请教一下大家
rhel4的系统,双网卡:
eth0地址192.168.1.17未插网线,状态为down
eth1地址192.168.1.196,连通网线,状态为up
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[hostA]#ip link
1: lo: <LOOPBACK,UP> mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:13:74:00:5c:38 brd ff:ff:ff:ff:ff:ff
3: eth1: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:19:e0:29:53:6e brd ff:ff:ff:ff:ff:ff
4: sit0: <NOARP> mtu 1480 qdisc noop
link/sit 0.0.0.0 brd 0.0.0.0
[hostA]# ip r
192.168.1.0/24 dev eth1 proto kernel scope link src 192.168.1.196
169.254.0.0/16 dev eth1 scope link
default via 192.168.1.254 dev eth1
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现在用同一网段的主机测试,
ping 192.168.1.17和ping 192.168.1.196都能ping通,并且traceroute都是hop都为1,arp看到的地址都是eth1的mac
[hostB]# traceroute 192.168.1.17
traceroute to 192.168.1.17 (192.168.1.17), 30 hops max, 40 byte packets
1 (192.168.1.17) 0.131 ms 0.091 ms 0.140 ms
[hostB]#ip r
192.168.1.0/24 dev eth0 scope link
127.0.0.0/8 dev lo scope link
default via 192.168.1.254 dev eth0
[hostB]#arp -a
(192.168.1.196) at 00:19:E0:29:53:6E [ether] on eth0
(192.168.1.17) at 00:19:E0:29:53:6E [ether] on eth0
能解释一下为什么能发现192.168.1.17吗?就算把他假设成一个router的话,那个eth0既然已经shutdown了,也不应该能ping通啊,何况hostB的默认网关还是1.254,不是1.196
[ 本帖最后由 aximofu 于 2007-10-31 12:54 编辑 ] |
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