Linux: Setup static routes
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Force traffic out on eth1 instead of eth0 (def gw), even though IP of system i'm accessing out on eth1 falls within the eth0 subnet
- Route tables before
[root@mgmt001 ~]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
172.31.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
172.31.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 ib0
169.254.0.0 0.0.0.0 255.255.0.0 U 1002 0 0 eth0
192.168.0.0 0.0.0.0 255.255.0.0 U 0 0 0 ib0
239.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 ib0
0.0.0.0 172.31.4.1 0.0.0.0 UG 0 0 0 eth0
- Add static route
route add -net 172.31.3.0 netmask 255.255.255.0 dev eth1- Route tables afterwards
[root@mgmt001 ~]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
172.31.3.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 ###########################
172.31.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
172.31.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 ib0
169.254.0.0 0.0.0.0 255.255.0.0 U 1002 0 0 eth0
192.168.0.0 0.0.0.0 255.255.0.0 U 0 0 0 ib0
239.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 ib0
0.0.0.0 172.31.4.1 0.0.0.0 UG 0 0 0 eth0- Add a default gateway
route add default gw 192.168.1.254 eth0- Add a route to another network (e.g. rocks headnode to access ipmi modules from local host)