Dear all During the last weeks I have learned quite a lot about the QoS mechanisms available on the Cat6500 platform.
Now I would like to confirm somehow whether I understand one thing correctly: As soon as I have a connection with less bandwidth than the interface line rate connected to the Catalyst there is no way to achieve decent QoS functionality involving class based and/or priority queueing according to the low bandwidth available behind a (Fast)Ethernet-interface, right? One can use the PFC to globally police the output rate of the port. But although it is possible to use different classes with different policies here, one cannot do any flexible shaping/priority- or bandwidth-queueing at this level. The actual cos-based queueing will be done on port level and its mechanism always works in relation to the actual port line rate (using wrr bandwidth RATIOS). Thus there is no way to achieve something like a shaping down to 5MBit/s AND considering the dscp/cos-classes at the same time. And it does not matter which queueing capabilities the linecard actually provides. I tried this with 6348, 6548 and 6748 together with Sup720-3BXL. Did I get this right or have I overlooked some (more or less obvious) solution? Regards, Grischa _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
