[c-nsp] Limit port usage on a cisco 3550

[Christopher Gatlin]

The 3550 Switch doesn't support egress policing or shaping at less then line
rate.

The only way I've been successful in limiting traffic outbound on this
platform is by using an 'aggregate policer' evaluated on ingress for ports
that will ultimately send traffic out the port you want to limit traffic
outbound on.

For example ports g0/1, 0/2 and 0/3 have the ability to send traffic to g0/8
but you don't and the sum of all traffic from ports g0/1, 0/2 and 0/3 (the
aggregate) to exceed 20Mbps.  You would build an aggregate policing policy
that classifies traffic that would be switched/routed out to g0/8 and apply
it to g0/1, 0/2 and 0/3.

http://www.cisco.com/en/US/docs/switches/lan/catalyst3550/software/release/12.2_44_se/configuration/guide/swqos.html#wp1048656

It's not optimal and doesn't scale well; but it does work.

Chris
http://travelingtech.net