Situation: We've approx. 15 L3 switches running VRF Lite (3550-12G. 3750, 3560E, 6506), CDP enabled, Management addresses Loopback0 in global routing table. We've all devices are in Device Repository in LMS, all pass the Credential Test, but the devices are missing in topology View or cannot form adjacency.
From several documents I found in the past I assume, that the reason is in IP addresses: Both devices (e.g. access L2 switch "A" and backbone L3 switch with multi VRF "B") see each other as CDP neighbors, but the "A" see bad Management IP address of "B", which is unreachable from security reason (e.g. it is customers' VRF).
None of our devices supports "cdp source-interface" (which seems to be the best sollution for this kind of problems), so the questions are
- is there any other way how to solve this kind of problem ?
- how does CDP selects IP address, which is used as "Managemet Address"
Thanks for answer.
Jan Klicka, SITMP