[cisco-voip] Somewhat OT: CDP neigh reports voice vlan as management address

[Jonathan Charles]

I am pretty sure CDP uses the Router-ID (aka the highest IP address on
the device, or a loopback), just like other routing protocols (check
out ODR for something really wacky).

So, your solution is to change the IP or add loopbacks everywhere,
make sure they are routable or you will kill your voice gateways.



Jonathan

On 6/4/07, Ed Leatherman <ealeatherman at gmail.com> wrote:
> Hello all,
>
> We have a 3750 acting as a router/distribution switch for a building, and
> then 3750 stacks off of that for closet switches. voice and data networks
> are fed down via .1q trunks to the closets. int g1/0/1 is a trunk port on
> the closet switch. When I issue a "sh cdp neigh g1/0/1 detail" it reports
> that the management IP of the distribution switch is the first voice vlan
> numerically on the switch. I'm thinking this is because we don't use vlan 1
> for management and its just picking the next vlan number which is always a
> voice vlan... does anyone know how to set this to our real non-vlan1
> management vlan?
>
> Probably harmless enough, CDP is only enabled for the feeder ports.. but i'd
> rather it reported the correct IP so if the network staff is on there they
> see the correct numbering.
>
> --
> Ed Leatherman
> Senior Voice Engineer
> West Virginia University
> Telecommunications and Network Operations
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