On Thu, 9 Oct 2014 16:59:16 +0000 Steve Kersley steve.kersley@keble.ox.ac.uk wrote:
(I was going to test from the NAV VM or watch the network traffic but the appliance doesn't come with the snmp tools or tcpdump, and is isolated from the Internet so not easily able to install them)
That's too bad, because that's exactly what I would have suggested you try.
I've had a rummage in the logs without seeing anything obvious. Any clues where to look to find why NAV is unable to talk SNMP to this one switch suddenly, after working fine for several weeks?
Could it be that responses from this particular switch have become too slow for NAV's default SNMP timeout value? You could try adjusting the timeout in `ipdevpoll.conf` and then restarting ipdevpoll.
`ipdevpoll.log` would be the log to look for relevant messages.