I'm testing a multicqst application (server and client) and am experiencing very high CPU load on my 4948 due to the IP Input Process.
I've read document ID 41160 related to this but don't have a solution yet.
It's a very basic test scenario, with server and client in the same VLAN.
With no querier in the VLAN, multicast is sent to all VLAN ports and CPU rtemains low. As soon as I enable the the VLAN's interface, the CPU goes to 80% +.
This occurs even with 2Mbps multicast which should not tax the switch.
My VLAN interface config is below. Does anyone have any ideas for me?
description Test multicast VLAN
ip address 192.168.20.2 255.255.255.0 secondary
ip address 192.168.20.1 255.255.255.0
no ip redirects
ip pim dr-priority 20
ip pim sparse-mode
ip igmp access-group ABC