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.
<br><br><div><span class="gmail_quote">On 6/4/07, <b class="gmail_sendername">Jonathan Charles</b> <<a href="mailto:jonvoip@gmail.com">jonvoip@gmail.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
I am pretty sure CDP uses the Router-ID (aka the highest IP address on<br>the device, or a loopback), just like other routing protocols (check<br>out ODR for something really wacky).<br><br>So, your solution is to change the IP or add loopbacks everywhere,
<br>make sure they are routable or you will kill your voice gateways.<br><br><br><br>Jonathan<br><br>On 6/4/07, Ed Leatherman <<a href="mailto:ealeatherman@gmail.com">ealeatherman@gmail.com</a>> wrote:<br>> Hello all,
<br>><br>> We have a 3750 acting as a router/distribution switch for a building, and<br>> then 3750 stacks off of that for closet switches. voice and data networks<br>> are fed down via .1q trunks to the closets. int g1/0/1 is a trunk port on
<br>> the closet switch. When I issue a "sh cdp neigh g1/0/1 detail" it reports<br>> that the management IP of the distribution switch is the first voice vlan<br>> numerically on the switch. I'm thinking this is because we don't use vlan 1
<br>> for management and its just picking the next vlan number which is always a<br>> voice vlan... does anyone know how to set this to our real non-vlan1<br>> management vlan?<br>><br>> Probably harmless enough, CDP is only enabled for the feeder ports.. but i'd
<br>> rather it reported the correct IP so if the network staff is on there they<br>> see the correct numbering.<br>><br>> --<br>> Ed Leatherman<br>> Senior Voice Engineer<br>> West Virginia University
<br>> Telecommunications and Network Operations<br>> _______________________________________________<br>> cisco-voip mailing list<br>> <a href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a>
<br>> <a href="https://puck.nether.net/mailman/listinfo/cisco-voip">https://puck.nether.net/mailman/listinfo/cisco-voip</a><br>><br>><br></blockquote></div><br><br clear="all"><br>-- <br>Ed Leatherman<br>Senior Voice Engineer
<br>West Virginia University<br>Telecommunications and Network Operations