Class-Based RTP and TCP Header Compression

[kirk.brookover]

Hello,

How does header compression work if the receiving router doesn't have compression configured?  I want to test this, but don't want to enable it on our entire WAN, I just want to make sure that I am not going to break traffic between the test sites and non-test sites.  I don't have a good way to lab this up.

Thanks!

[rstanisl]

Kirk,

You must configure  on both ends of the network

http://www.cisco.com/en/US/customer/docs/ios/qos/configuration/guide/config_cb_hdr_comp_ps6350_TSD_Products_Configuration_Guide_Chapter.html

In a typical network topology, header compression is configured at both a  local router and a remote router. If you configure class-based RTP  header compression (or class-based TCP header compression) on the local  router, you must also configure RTP header compression (or TCP header  compression) on the remote router.

However, when you configure either RTP or TCP header compression on the remote router, you can choose one of the following:

•You can configure class-based RTP or TCP header compression on the remote router (by using the instructions in this module)

or

•You can configure RTP or TCP header compression directly on the interface of the remote router (by using the instructions in the "Configuring RTP Header Compression" module or the "Configuring TCP Header Compression" module, respectively).

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Note If you configure RTP or TCP header compression directly on the interface of the remote router, you must specify the iphc-format keyword for PPP and HDLC interfaces. For Frame Relay interfaces, the iphc-format keyword is not supported; only the Cisco proprietary format (that is, the cisco keyword) is supported.

hope this helps.

raymond