On Thu, 7 Apr 2016, Kadlecsik József wrote:
Instead of the real topology
----------- gsw17a (SW) | kfki-sw (GSW) ---- gsw21 (SW) --- gsw21alag (SW) | ----------- gsw22a (SW)netmap shows a "reversed" topology, as shown in the attachment (full.png), i.e. gsw21 is the farthest from kfki-sw and gsw17a, gsw21alag, gsw22a "connect" gsw21 to kfki-sw.
The IP device Neighbors of gsw21 shows the proper topology (gsw21.png) except that kfki-sw is not shown.
The IP device Neighbors of gsw21alag shows the wrong topology: neighbor is kfki-sw instead of gsw21 (gsw21alag.png), the same true for gsw17a and gsw22a. The direct neighborship candidate is (partly) consistent with this (other fields are empty, non-related, invalid neighbors not listed):
Sysname Interface source Candidate neighbor gsw17a 1/48 cam kfki-sw gsw21alag 1/24 cam kfki-sw gsw21 1/45 cam kfki-sw gsw21 1/107 cam gsw21alag gsw21 1/111 cam gsw17a gsw21 1/112 cam gsw22a gsw22a 1/48 cam kfki-sw kfki-sw Gi1/6 cam gsw17a kfki-sw Gi1/6 cam gsw21alag kfki-sw Gi1/6 cam gsw21 kfki-sw Gi1/6 cam gsw22a
The switch types are:
kfki-sw Cisco 6506-E gsw21 D-Link DSG-3120-48TC gsw17a D-Link DSG-3120-48TC gsw21alag D-Link DSG-3120-24TC gsw22a D-Link DSG-3120-48TC
What can be wrong here? What should I check?
Hm, I'm going to enable LLDP on the switches...
Best regards, Jozsef -- E-mail : kadlecsik.jozsef@wigner.mta.hu PGP key: http://www.kfki.hu/~kadlec/pgp_public_key.txt Address: Wigner Research Centre for Physics, Hungarian Academy of Sciences H-1525 Budapest 114, POB. 49, Hungary