QOS on GRE Interface

[Vinayaka Raman]

All sites have an internet link and a policy shaper applied on WAN link.

we have a GRE tunnel created from the site to HQ

70 percent of the traffic is via physical interface (direct to internet) 

remaining 30 percent of the traffic is via tunnel (internal networks)

I wanted to prioritize traffic that flows via tunnel (eg voice, window auth traffic, file share, remote desktop etc)

should i just create one more service policy and apply on tunnel interface ?

What should be the tunnel bandwidth?

little confused between qos management between physical and tunnel interface

[Leo Laohoo]

Duplicate post. 

Go here:  https://supportforums.cisco.com/discussion/12262621/qos-gre-interface

[hkkalra]

Hi, 

These has been alot of speculations about using QoS configuration on both the Physical and GRE interfaces. As per Cisco TAC they don't recommend using this kind of setup (telling from my own experience). There are a couple of options you can use in this case. Personally i prefer using qos pre-classify. As once the traffic going out of the physical interface is GRE encapsulated QoS process is not able to apply the qos classifications on the traffic. And thus we can modify our QoS that we apply on the physical interface to also have the classifications for the traffic going through the tunnel and then use "qos pre-classify" command under the tunnel interface. This would make sure that QoS classifications are applied on the traffic before it is GRE encapsulated. 

For more details please look into the following link:

http://www.cisco.com/c/en/us/support/docs/quality-of-service-qos/qos-policing/10106-qos-tunnel.html

Regards,

HK