[ILUG] Quagga temporarily drops routes after ifup eth0:1

[Lance Dryden]

On Friday 10 October 2008 11:02:49 Kenn Humborg wrote:
> Centos5.2.  quagga-0.98.6-5.el5.
>
> I have a host with two NICs, one on the Internet
> and one internal.  It runs quagga'a ospfd to
> exchange routing info over the internal NIC to
> other internal hosts.
>
> I want to add another IP address to the external NIC.
>
> If I do
>
>    ip addr add xx.xx.xx.xx/xx broadcast xx.xx.xx.xx dev eth0
>
> all the OSPF routes are removed from
> the routing table for maybe 20 seconds or more,
> seemingly while ospfd re-calculates the routes.

[snip]

As much as I dislike aliases, this is the one situation where "ifconfig eth0:1 
w.x.y.z broadcast w'.x'.y'.z' netmask w*.x*.y*.z*" may be better for you.

-- Lance