02-05-2013 08:28 AM - edited 03-04-2019 06:56 PM
I have two 3560G 24p switches, connected to each other via two links in Etherchannel. From one of the switches i retrieve SNMP info about port status and traffic for these two ports. That works great, until i pull out random cable. The switch responds with ifOperStatus = 2 and traffic drops to zero for that partikular port, as it should. But a some of seconds later it stops responding to my snmp reguests for ~ 5 seconds. That causes problems as my watchdog sets an alarm as it thinks the connection to the switch has been lost. (It checks switch uptime is increasing all the time)
If I set a delay on the watchdog on my monitoring system of 15sec, it works. But it ain't that nice to have a delay of 15 sec if the connection really is lost.
Any ideas on what to look for? I'm fairly new into managed switches so advices are appreciated!
02-05-2013 09:22 AM
Hello Carl,
A couple of questions:
Thank you!
Best regards,
Peter
02-05-2013 09:53 AM
Thank you for fast reply,
1. It's one of the Etherchannel cables, as these are the two I want to monitor.
2. I have set the SNMP agent to poll the switch with 1 sec interval
3. Not really sure, but I have not changed the default settings for STP(If I read the manual correct the default is PVST+ ?) Tried uplinkfast but no difference.
4. If connect my computer to switch nr1 (The one I'm getting SNMP data from) I get no package losses what so ever. If i connect to the other switch but still ping nr1, I only loose a couple of packets just in the disconnection moment. Which I suppose is normal?
Thanks again!
Best regards,
Carl
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