I'm trying to figure out the QoS for a router on a stick location with multiple vlans using either the 1800 or 2800 series routers. The switching QoS is done and works fine. On the router, should I apply a service policy both inbound and outbound, or just outbound, or something else entirely?
a policy-map that implements a scheduler with LLQ (priority) and CBWFQ (bandwidth) can be applied only outbound.
If all your traffic is already marked at the LAN switch level you just need to manage the output queueing.
If you need to mark ingress traffic on a vlan you will need a different service policy where each class-map invoked has some form of DSCP marking that can be used outbound by the scheduler of another interface.
Be aware that when using percentages all these are referred to the interface bandwidth so you may need to tune the bandwidth on each VLAN subif (default value should be inherited by physical interface value 100000 Kbps for a FE)
in order to avoid to oversubscribe in that case you will get an error message when trying to apply the policy-map on the second VLAN subif.
Ok, thank you. All of the traffic is properly marked by the time it gets to the one armed router. So it sounds like I only need the outbound service policy attached to the sub-interfaces, if I understand you correctly.
As far as the percentages go, would specifying the data rate be a better way to go?
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 custome...