About lkumb

lkumb · 04-27-2026

Dear community,I have a problem concerning our C1300 switches: Some of them loose their connection to the network. I have been seeing and researching this for months, but I could not find the culprit.We installed another C1300 switch while removing a...

lkumb · 04-27-2026

Actually, it seems to be a spanning-tree problem.On the C9500 I can see logging entries for the port of one of the problematic C1300 switches:Apr 28 06:13:46.573: %SPANTREE-6-PORT_STATE: Port Po30 instance X moving from forwarding to blocking Apr 28 ...

lkumb · 04-27-2026

Dear Mark,thanks for your recommendation. We have a central syslog server and I already looked at the logs, but I will dig deeper into the logs. To get more information, I increased the logging level of several devices to 'debug'. Also at the NMS I r...

lkumb · 02-17-2026

Cisco Catalyst 1300 series switches support only one voice vlan per switch.Contrasting to the C1000 series they have a different, linux based firmware (much like in other SMB switches like SG500/SG550X or CBS220/CBS350) and a different approach of im...

Member Since	‎10-13-2025 07:45 AM
Date Last Visited	‎04-27-2026 02:28 AM
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Cisco C1300 switches losing connection for 21 seconds

Re: Cisco C1300 switches losing connection for 21 seconds

Re: Cisco C1300 switches losing connection for 21 seconds

Re: Multiple voice vlan on c1300