I'm currently using a 3750 in a co-lo environment as my co-lo backbone.
One of the interfaces goes to an MPLS cloud. Now, the co-lo delivers the circuit via Ethernet. As such, my interface is running 100Mbps. But, it's only a 3Mbps cloud.
How can I rate-limit this interface down to 3Mbps in such a way, to where I can apply my QoS policies, and QoS will use the rate-limited 3Mbps rather than the full 100Mbps.
According to the QoS Order of Operations, rate-limiting comes BEFORE queuing, and I'm afraid that my voice packets may get dropped.
I can police the individual voice traffic, but I want all other traffic to use up to 100% of the line, if voice is not there.
srr-queue bandwidth limit won't work by itself, as I can only go down to 10% (which, from 100Mbps is 10Mbps, and I need 3Mbps).
I guess I'm just getting hung up on the 3Mbps circuit. Since it's a 100Mbps interface, queuing will never really happen on my side, since the bandwidth will support it.
Thanks for any advice you have!
Can you run 10 Mbps with the MPLS provider's Ethernet?
If not, place a "dumb" L2 switch between your 3750 and MPLS Ethernet. Your side, 10 Mbps; MPLS side, 100 Mbps.
For either, once your interface is at 10, set ssr-queue bandwidth for 30%.