Problem: On Linux systems, do not use "IP address add" command when aliasing multiple clusters on the loopback device

Certain considerations must be taken when using Linux kernel 2.4.x servers. If the server has a cluster address configured on the loopback device using the ip address add command, only one cluster address can be aliased.

When aliasing multiple clusters to the loopback device use the ifconfig command, for example:
ifconfig lo:num clusterAddress netmask 255.255.255.255 up 

Additionally, there are incompatibilities between the ifconfig method of configuring interfaces and the ip method of configuring interfaces. Best practice suggests that a site choose one method and use that method exclusively.



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Last updated: September 12, 2012 11:41 PM EDT
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