backup LAN

[Roshan]

OEL 8

Hello Erman,

please advise how to create route like below on a server?

We add a new NIC for backup

ifconfig shows below output:
enp11s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 3.2.20.21  netmask 255.255.255.0  broadcast 3.2.20.255
        inet6 fe80::47d0:197d:b912:ef75  prefixlen 64  scopeid 0x20<link>
        ether 56:6f:70:24:00:27  txqueuelen 1000  (Ethernet)
        RX packets 694983  bytes 44803780 (42.7 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 1604  bytes 92788 (90.6 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         3.2.20.1        0.0.0.0         UG    104    0        0 enp11s0
3.2.20.0        0.0.0.0         255.*.*.0   U     104    0        0 enp11s0 <----
3.1.20.0        3.2.20.1        255.*.*.0   UG    0      0        0 bondeth1.820 <----- add new one


it should be similar to the one below
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
3.1.20.0        3.2.20.1        255.*.*.0   UG    0      0        0 bondeth1***
3.2.20.0        0.0.0.0         255.*.*.0   U     401    0        0 bondeth1***

Regards,
Roshan

[ErmanArslansOracleBlog]

Normally you don't need to do anything manual for routing. But if you need manual route config, you can use "route add" command.