recently my company has developed network with GRE Tunnel. But when I try to add qos feature using class based weighted fair queue, the router refuse and tell that CBWFQ is not supported in interface tunnel. is there a way for interface tunnel for using qos feature
When an interface becomes congested and packets start to queue, you can apply a queuing method to packets waiting to be transmitted. Cisco IOS logical interfaces do not inherently support a state of congestion and do not support the direct application of a service policy that applies a queuing method. Instead, you need to apply a hierarchical policy as follows:
Create a "child" or lower-level policy that configures a queueing mechanism, such as low latency queueing with the priority command and class-based weighted fair queueing (CBWFQ) with the bandwidth command. See Congestion Management for more information.
priority 512Create a "parent" or top-level policy that applies class-based shaping. Apply the child policy as a command under the parent policy since admission control for the child class is done based on the shaping rate for the parent class.
shape average 2000000
service-policy child Apply the parent policy to the tunnel interface.
service-policy tunnelThe router prints the following log message when a tunnel interface is configured with a service policy that applies queuing without shaping.
router(config)# interface tunnel1
router(config-if)# service-policy output child
Class Based Weighted Fair Queueing not supported on this interfaceTunnel interfaces also support class-based policing, but they do not support committed access rate (CAR).
Note: Service Policies are not supported on tunnel interfaces on 7500.
also a cisco guru told me it is not advised to configure cbwfq on tunnel interfaces when you have a lot of tunnels, 30 will kill the cpu, so you should put it on the physical interface
eclaereboudt, you told me to configure cbwfq in the physical interface, I have already did that, but it didn't make an effect, because when I tried in serial interface the packet have already encapsulated with GRE header, so the serial can't see the ToS field or DSCP. But you're right having a lot of tunell running cbwfq will kill the cpu, so there must be a way running service-policy in physical interface
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We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...