我有以下的networking接口configuration，
两个网关都可以访问互联网。
在这种情况下ping -I eth1 4.2.2.2不起作用。 以下是命令的输出：
$ ip route show 192.168.78.0/24 dev eth0 proto kernel scope link src 192.168.78.1 192.168.253.0/24 dev eth2 proto kernel scope link src 192.168.253.131 192.168.254.0/24 dev eth1 proto kernel scope link src 192.168.254.65 169.254.0.0/16 dev eth0 scope link metric 1002 169.254.0.0/16 dev eth1 scope link metric 1003 169.254.0.0/16 dev eth2 scope link metric 1004 default via 192.168.253.1 dev eth2 $ cat /etc/iproute2/rt_tables 255 local 254 main 253 default 0 unspec 1 eth1 2 eth2 $ ip rule ls 0: from all lookup local 32765: from 192.168.254.65 lookup eth1 32766: from all lookup main 32767: from all lookup default $ ip route show table eth1 default via 192.168.254.1 dev eth1 $ ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 100 link/ether 00:0b:ab:65:10:97 brd ff:ff:ff:ff:ff:ff inet 192.168.78.1/24 brd 192.168.78.255 scope global eth0 inet6 fe80::20b:abff:fe65:1097/64 scope link valid_lft forever preferred_lft forever 3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 100 link/ether 00:0b:ab:65:10:98 brd ff:ff:ff:ff:ff:ff inet 192.168.254.65/24 brd 192.168.254.255 scope global eth1 inet6 fe80::20b:abff:fe65:1098/64 scope link valid_lft forever preferred_lft forever 4: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 100 link/ether 00:0b:ab:65:10:99 brd ff:ff:ff:ff:ff:ff inet 192.168.253.131/24 brd 192.168.253.255 scope global eth2 inet6 fe80::20b:abff:fe65:1099/64 scope link valid_lft forever preferred_lft forever 5: eth3: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000 link/ether 00:0b:ab:65:10:9a brd ff:ff:ff:ff:ff:ff 6: eth4: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000 link/ether 00:0b:ab:65:10:9b brd ff:ff:ff:ff:ff:ff 7: eth5: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000 link/ether 00:0b:ab:65:10:9c brd ff:ff:ff:ff:ff:ff 8: sit0: <NOARP> mtu 1480 qdisc noop state DOWN link/sit 0.0.0.0 brd 0.0.0.0
所有rp_filter值都设置为0。
注意： traceroute -i eth1 4.2.2.2按预期工作，但如果不是默认路由，则通过接口eth1 ping不成功。
请让我知道是否需要更多的设置或如果你有任何指针。
据我所知，它不应该如你所想的那样工作。 数据包将通过默认网关，除非您为具体目标IP添加静态路由或使用策略路由。 所以请尝试添加一些策略路由规则：
echo 300 eth2_gate >> /etc/iproute2/rt_tables ip route add default via 192.168.254.1 table eth2_gate ip rule add from 192.168.253.131 table eth2_gate
之后， ping -I应该工作。 我希望它有帮助。
我也困惑为什么traceroute -s工作。