Posted on 2006-07-14
I have a small network (5 24 port cisco 3550s). Currently I am experiancing a lot of network congestion on one of the switches which I will be taking care of this weekend. Howerver, while researching this problem I noticed it causing other problems. Namely it is mucking up Spanning Tree Protocol.
When i did my research in to STP I found many articles saying that it was a bad thing to leave all the swtich ports in VLAN1 as this would add traffic to the cpu and could cause a loss of BPDU's which would break STP. My busiest swiitch is reporting RTD-1-ADDR_FLAP messages (lots of them) I am guessing that STP is being effected by the HIGH network traffic.
So my question is should I move all my switch ports to another VLAN? And how hard is this? We do not use VLAN's here and I really do not see a need for them here except for cases like this. The other thing mentioned is that with the newer IOS's you can remove VLAN1 (some how). I do have the newest IOS installed on all my switches so I should be able to do this too. Is this a good solution or is moving every thing to another VLAN better?