High Latency has appeared on Cisco Switched network - 2 core routers in place which are swapping HSRP states
Posted on 2008-06-16
We have a network consisting of 40 Cisco switches (ranging from 3560's to 2970's) with 10 vlans all doing the routing at 2 core Cisco 6513 routers (2 off for redundancy)
The last 2 days we have suddenly seen lots of latency on the network which has resulted in HSRP failures between the two routers.
Also Ciscoworks reports HighBroadcastRate & HighErrorRates on many switches
Switches physically look like they are passing large amounts of traffic, presumably broadcast traffic.
The switch logs do not appear out of the ordinary
Does anyone know where I could start to isolate this issue. It could be a broadcast storm, but how could I find where this started. Any help or advice would be greatly appreciated.