I use several Catalyst 3550 with equal IOS and configurations to route multicast. When i start multicsting i see that IP INPUT CPU overhead on one of switches raises to 90%. Other switches have normal CPU overhead with all networks subscribed to multicast group. I wondering what will couse this problem on switch.Any ideas ?
The multicast server has a TTL value that is probably set to one. Raise this value to three or four as an experiment. The reason for this is a multicast with a TTL value of one must be process switched rather than switched in hardware, higher values aren't expiring so they are either propagated or discarded. The process switching means the CPU takes a hit on the 3500 because it is a layer three capable device. I have noticed this before with a much used desktop imaging product that is a good product but the TTL default is one, arrrrrgh!
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
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