![](https://secure.gravatar.com/avatar/ecfe3c7b91f6db9cb7a210c3bd1185ae.jpg?s=120&d=mm&r=g)
We have a Cisco C2960S running 12.2(55)SE3 that Observium insists has a whole bunch of VLANs that don’t actually exist on the switch.
The VLANs (No Graphs) screen, for example, shows: VLAN
Description
Other Ports
Vlan 1
default
Vlan1https://observium.merlin.mb.ca/device/device=444/tab=port/port=19129/(U), Gi1/0/25https://observium.merlin.mb.ca/device/device=444/tab=port/port=19158/(U), Gi1/0/26https://observium.merlin.mb.ca/device/device=444/tab=port/port=19159/(U), Te1/0/1https://observium.merlin.mb.ca/device/device=444/tab=port/port=19160/(U), Te1/0/2https://observium.merlin.mb.ca/device/device=444/tab=port/port=19161/(U)
Vlan 2
ccey
Te1/0/1https://observium.merlin.mb.ca/device/device=444/tab=port/port=19160/, Te1/0/2https://observium.merlin.mb.ca/device/device=444/tab=port/port=19161/
Vlan 3
ccmy
Te1/0/1https://observium.merlin.mb.ca/device/device=444/tab=port/port=19160/, Te1/0/2https://observium.merlin.mb.ca/device/device=444/tab=port/port=19161/
Vlan 4
me
Te1/0/1https://observium.merlin.mb.ca/device/device=444/tab=port/port=19160/, Te1/0/2https://observium.merlin.mb.ca/device/device=444/tab=port/port=19161/
Vlan 5
Hermes-Uwrtr1
Te1/0/1https://observium.merlin.mb.ca/device/device=444/tab=port/port=19160/, Te1/0/2https://observium.merlin.mb.ca/device/device=444/tab=port/port=19161/
Vlan 6
Vlan 9
firewall
Te1/0/1https://observium.merlin.mb.ca/device/device=444/tab=port/port=19160/, Te1/0/2https://observium.merlin.mb.ca/device/device=444/tab=port/port=19161/
Vlan 10
Vlan 90
VLAN0090
Te1/0/1https://observium.merlin.mb.ca/device/device=444/tab=port/port=19160/, Te1/0/2https://observium.merlin.mb.ca/device/device=444/tab=port/port=19161/
Vlan 91
Vlan 99
ITC-Office-Inside
Te1/0/1https://observium.merlin.mb.ca/device/device=444/tab=port/port=19160/, Te1/0/2https://observium.merlin.mb.ca/device/device=444/tab=port/port=19161/
…but VIDs 6, 10 and 91 don’t actually exist on this device:
UMTor1#show vlan id 6 VLAN id 6 not found in current VLAN database UMTor1#show vlan id 10 VLAN id 10 not found in current VLAN database UMTor1#show vlan id 91 VLAN id 91 not found in current VLAN database
I have manually re-run discovery, successfully.
Every bogus VID strictly follows a valid VID, i.e. 5 is valid, 6 is not. 9 is valid, 10 is not. 90 is valid, 91 is not. And so on.
Anyone else run into this?
Any ideas how to troubleshoot this?
Thanks, -Adam
Adam Thompson Consultant, Infrastructure Services [[MERLIN LOGO]]https://www.merlin.mb.ca/ 100 - 135 Innovation Drive Winnipeg, MB, R3T 6A8 (204) 977-6824 or 1-800-430-6404 (MB only) athompson@merlin.mb.camailto:athompson@merlin.mb.ca www.merlin.mb.cahttp://www.merlin.mb.ca/