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

[Ed Leatherman]

I went back and checked, they actually do have a loopback interfaces
configured on all their equipment for management - and if i'm reading it
right form the eigrp topology it's using that loopback interface for the
router-ID as expected. I might open a TAC on it if they have the switches on
our smartnet contract.

On 6/4/07, Jonathan Charles <jonvoip at gmail.com> wrote:
>
> 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
> > _______________________________________________
> > cisco-voip mailing list
> > cisco-voip at puck.nether.net
> > https://puck.nether.net/mailman/listinfo/cisco-voip
> >
> >
>



-- 
Ed Leatherman
Senior Voice Engineer
West Virginia University
Telecommunications and Network Operations
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