From: Scott Morris (smorris@xxxxxxxxxxxxxx)
Date: Mon Sep 25 2000 - 11:21:04 GMT-3
The cRTP (Compressed RTP) is done on a hop-by-hop basis, so configuring it
just on the subinterfaces is perfectly fine. Like most other commands, if
you configure it on the physical interface, this will become the default
behavior for all subinterfaces.
Scott
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Mark Lewis
Sent: Monday, September 25, 2000 10:10 AM
To: ccielab@groupstudy.com
Subject: VoIP (Lab9,etc.)
Hi guys,
I just been looking some of the voice stuff from ccbootcamp.com. I'm a
little mystified on a few points:
a. Does RTP header-compression have to be enabled on the phy. interface if
you only need it on one of your subint.s ?? Surely if I do that I'm enabling
for all subint.s. Marc's config (lab9/r2) shows it enabled as described. So
does the RTP config for VoIP in:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/voice
_c/vcprt1/vcvoip.htm#15260
Caputo's book, on the other hand, shows (& explains) usage on individual
subint.s (p.67-69).
So, is enabling it JUST on the subint. okay? I'm starting to doubt myself
after looking at Marc's config.
b. Marc has mtu configured similarly on the physical int. - again why not
just the subint. And why not 'ip mtu' not just 'mtu'? Wouldn't 'ip mtu' be
better - it's voice over IP after all, with 'mtu' everthing is limited isn't
it?
Again, the config on the above link agrees with Marc (but with only one
subint, so it doesn't matter).
Can anyone shed any light on this ??
Thanks in advance,
Mark
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