second ip address on the same interface but on a different subnet

Posted by fptstl on Server Fault See other posts from Server Fault or by fptstl
Published on 2012-07-09T17:42:54Z Indexed on 2012/07/10 3:17 UTC
Read the original article Hit count: 438

Filed under:

linux

|

networking

|

centos

|

redhat

|

routing

Is it possible in CentOS 5.7 64bit to have a second IP address on one interface (eg. eth0) - alias interface configuration - in a different subnet?

Here is the original config for eth0

more etc/sysconfig/network-scripts/ifcfg-eth0
# Broadcom Corporation NetXtreme BCM5721 Gigabit Ethernet PCI Express
DEVICE=eth0
BOOTPROTO=static
BROADCAST=192.168.91.255
HWADDR=00:1D:09:FE:DA:04
IPADDR=192.168.91.250
NETMASK=255.255.255.0
NETWORK=192.168.91.0
ONBOOT=yes

And here is the config for eth0:0

more etc/sysconfig/network-scripts/ifcfg-eth0:0
# Broadcom Corporation NetXtreme BCM5721 Gigabit Ethernet PCI Express
DEVICE=eth0:0
BOOTPROTO=static
BROADCAST=10.10.191.255
DNS1=10.10.15.161
DNS2=10.10.18.36
GATEWAY=10.10.191.254
HWADDR=00:1D:09:FE:DA:04
IPADDR=10.10.191.210
NETMASK=255.255.255.0
NETWORK=10.39.191.0
ONPARENT=yes

How would the resolv.conf file should change since there are two different gateways? Any other change needed?

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