I have a client where all thier Cisco equipment from the 2811 routers, to the pix, and all the 3500 switches all the lights on the ports are blinking in unisence. Meaning they are all flashing at the same time. I checked and saw that spanning tree is not configured properly. Switch off the core switch is the Root bridge for Vlan 1 and another switch off the core is the root for the rest of the Vlans. I think If i make the Core switch the Root, this might help me find a loop. Have you guys ever seen this before.
Some problems the client is experiencing is Echo on VOIP calls inbound and slow internet on the network certain times. Keep in mind our client also has recently had virus on thier network.
But I am very concerned about the lights flashing the way they are. All flashing at the same time.