Strange one here, I have 2 x 3750G switches which connect to our Nortel core switches. The trunk is setup as an Etherchannel, I have 2 ports in each etherchannel goign to the Nortel switches.
(I can add a diagram if required)
On these 3750's is our Exchange 2007 email system and I use Solarwinds Orion tools to monitor these Exchaneg servers and email me if anything goings down.
I am using 3 VLAN's on the 3750's and Solarwinds happy ping sthe servers and I get no issues at all. The problem I am getting is pinging the VLAN's on these 3750's (basically their default gateways), throughout the day I will get email alerts saying VLAN 10 is down then up, then later VLAN 20 is down then up, this can take only 30 seconds, but they never go down at the same time and it might only be one 3750 switch for that day, the other will be fine.
I'm just not sure where to start as the Exchaneg system is fine, but it just concerns me.
Is it the Nortel's or the trunk?