[c-nsp] Problems with secondary ip address on subinterfaces

[Paul Cairney]

On Sun, Dec 17, 2006 at 10:40:56AM -0500, Ed Ravin wrote:
> On Sun, Dec 17, 2006 at 12:32:28PM +0000, Paul Cairney wrote:
> > I am having some odd issues with secondary IP addresses configured
> > on a couple of 2821's running c2800nm-spservicesk9-mz.124-7b.bin.
> ...
> > When these ip's are configured as the primary ip's on this
> > subinterface (either standalone or with my own ip's as secondarys)
> > then I can ping the providers ip's no problem (10.0.25.2 and
> > 10.0.25.3) however when these address are configured as secondarys
> > it doesnt want to work.
> 
> By default, ping uses the primary address of the interface as the
> source IP on the ping packet.  If that IP is not reachable by your
> destination, you won't get a response.
> 
> Use "ping ip DESTINATION-IP source SOURCE-IP" to use test pings
> from the router.

Thanks, I suspected it was something simple :)

Paul