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Topology-UI shows LLDP links not correct

Description

In the topology UI the LLDP links are shown twice for each direction. The information gathered by enhanced linkd are correct persisted in the database. The .PNG shows the real topology. The xlsx file is a dump with the link data. It seems the Topology UI visualizes a link in both directions which is a weird unexpected behavior.

The LLDP neighborhood data is not discovered correct. The correct topology verified with show lldp neighbor on the CLI is documented in cdp-test.png. The cdplink database dump in XLSX show the wrong detected links and interfaces. The comments explain what should be the correct value in the link entry.

Acceptance / Success Criteria

None

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8

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Antonio Russo March 26, 2016 at 8:52 AM

If you spent some seconds in looking at the mib data you have attached you can see that in the walk of R3 there are only two lldp links...

.1.0.8802.1.1.2.1.4.1.1.8.0.3.1 = STRING: "GigabitEthernet0/0"
.1.0.8802.1.1.2.1.4.1.1.8.0.4.2 = STRING: "GigabitEthernet0/0"
.1.0.8802.1.1.2.1.4.1.1.9.0.3.1 = STRING: "NMM-R1.informatik.hs-fulda.de"
.1.0.8802.1.1.2.1.4.1.1.9.0.4.2 = STRING: "NMM-R2.informatik.hs-fulda.de"

Clearly....so I'm going to close this because I guess thare is a problem with oyr lab.
If you need to reopen please attach new data from the lab.

Antonio Russo March 26, 2016 at 8:49 AM

Ronny, this is really starange. I have created a test for this behaviuor and get the right data.

So if you want you have this fixed you should attach the snmpwalk from the lost device

Ronny Trommer February 12, 2016 at 8:32 AM
Edited

Even rescan did not discover the missing LLDP link from R3.

Ronny Trommer February 12, 2016 at 8:26 AM

See Screenshot attached, LLDP did not discover a link from the lab topology.

Ronny Trommer February 12, 2016 at 8:26 AM

LLDP discovery missed this link which is correct discovered with CDP.

Done

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PagerDuty

Created November 26, 2015 at 10:24 AM
Updated August 25, 2022 at 1:56 PM
Resolved March 26, 2016 at 8:53 AM