RE: RTP Compression Header

From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Sun May 14 2006 - 19:18:46 ART


Larry,
        This link should help out.

Compressed Real-Time Protocol

http://www.cisco.com/en/US/products/sw/iosswrel/ps1835/products_configur
ation_guide_chapter09186a00800b75cc.html#wp1000925

        Remember that you should understand the technology or feature
before you start configuring any thing. I cover this exact issue in an
article I wrote about how to pass the CCIE lab. It's under the "Three
Step Learning Process" section.

http://www.internetworkexpert.com/resources/ccielab.htm

HTH,

Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
bdennis@internetworkexpert.com
 
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Direct: 775-745-6404 (Outside the US and Canada)
 

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Larry Chuon
Sent: Sunday, May 14, 2006 11:01 AM
To: ccielab@groupstudy.com
Subject: RTP Compression Header

Hi Group,

I'm play around with command "ip rtp header-compression". After reading
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft
/120t
/120t7/rtpfast.htm,
I'm still unsure its purpose. Can someone please shed some light on
this?
From what I gathered, this command can also be used on frame-relay
interface
as well. Under what circumstance do I need to use this?

Also, in help mode, I show "passive" option. Does it work similarly to a
passive interface?

r6(config-if)#ip rtp header-compression ?
  ietf-format Compressing using IETF format
  iphc-format Compress using IPHC format
  passive Compress only for destinations which send compressed
                    headers
  periodic-refresh Periodic context refresh

TIA,
Larry



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