Yesterday I upgraded from 5.0 U2 to 5.5. Everything went fine to the best of my knowledge. When I got into the office today I logged in to the console and had a bunch of Alerts, which then cleared themselves a few seconds later. I am sitting here watching the console and it seems like every thirty seconds or so I get anywhere from 2 to 15 VPG0004 alerts, and then they clear themselves up. The KB for that alert tells me that there are three possible causes for this, one of them being my MTU size. I tested it at 1500 and I did get the “fragmented” message. I also get the “fragmented” message at 1490 and 1480, but 1470 seems good.
We are using a 10Gb dark fiber link between our datacenters, and we have jumbo frames turned on. I never experienced this with 5.0 U2, and nothing has changed in the environment other than upgrading to 5.5 yesterday. Is this a known issue with the new version?
I ended up opening a tech support case for this. They released 5.5 SP1 yesterday for this.