QoS over GRE tunnel

[JOHN VOLTER]

Hi,

we have two remote sites connected to each other using a GRE tunnel. I wanted to apply a QoS policy to ensure two video cameras can have at least 400kbps bandwidth available. When I apply this QoS policy to the Tunnel interface I am getting error message saying CBWFQ is not supported.

policy-map polycom-pm

class polycom-cm

bandwidth 400

class class-default

(config-if)#service-policy output polycom-pm

Class Based Weighted Fair Queueing not supported on interface Tunnel12

does anyone know of any tricks to get around this problem and be able to reserve/guarantee bandwidth across a GRE tunnel?

Thank you!

[Aaron Harrison · Accepted solution]

Hi

If I remember correctly you need to apply the QoS policy to the physical interface, and then use the qos pre-classify command on the tunnel interface...

This copies packet markings into the extra tunnel header (which is all that intermediate devices will see).

See this link:

http://www.cisco.com/en/US/partner/products/sw/iosswrel/ps1835/products_command_reference_chapter09186a0080087f3c.html#wp1072696

Regards

Aaron

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[JOHN VOLTER]

Aaron,

thanks for the guidelines. I had to look through http://www.cisco.com/application/pdf/en/us/guest/netsol/ns241/c649/ccmigration_09186a00801ea79c.pdf to figure out the exact configuration for QoS over GRE over IPSEC ; the trick is to apply "qos pre-classify" to both tunnel and crypto map.

thanks again.

John.