I just got some already configured switches that are giving a lot of problems on the network with port shutdowns due to storm control policies.
Finally after dumping the running-config. I've saw extremely tight broadcast and multicast storm control policies, as low as 2 percent on a distribution switch, even on the trunk ports.
interface GigabitEthernet1/0/1 speed 100 storm-control broadcast level 2.00 storm-control multicast level 2.00 storm-control action shutdown no cdp enable spanning-tree portfast !
Those are the configurations on all switchports of a 2960 model, and as I said, those guys act as a distribution switch, so some ports are plain access ports and others have switches attached to them.
The whole point here is: why using storm control on distribution switches and why using with this low threshold. I've seen a good practice being 5 to 10 percent of broadcast/multicast storm control, but never 2 percent. And why it was enabled on trunk ports? This makes no sense for me, since trunk ports will be receiving a lot more broadcasts then other ports.
Thanks in advance,
PS: Just in case, this network is huge and badly deployed, so it's a /20 network running with more than 2000+ devices, so I'm expecting huge broadcast traffic on the devices, which causes problem with this storm control policy.