[cisco-voip] Voice header compression Problem withIETFencapsulation

[George Dormishev]

Here this might help you...
But the encapsulation of IETF i am not sure you can use cRTP.
You should check it out!

Example...

Class-map match-all voice-signaling
  match access-group 103
class-map match-all voice-traffic
  match access-group 102
!
policy-map VOICE-POLICY
  class voice-traffic
    priority 13
 class voice-signaling
   bandwidth 8
  class class-default
   fair-queue
!
interface Multilink1
 ip address 100.100.100.2 255.255.255.252
 ip tcp header-compression iphc-format
 service-policy output VOICE-POLICY
 no cdp enable
 ppp multilink
 ppp multilink fragment-delay 10
 ppp multilink interleave
 multilink-group 1
  ip rtp header-compression iphc-format
no shut
!
interface Serial0/0
 bandwidth 33
 no ip address
 encapsulation ppp
 ppp multilink
 multilink-group 1
no shut

/george

P.S didnt try the cRTP with ppp but i read somewhere that you can use it with 
ppp encapsulation

On Wednesday 08 June 2005 17:08, King, Jesse wrote:

> What version of IOS?
>
> You could try putting cRTP in a policy-map...
>
> what size cir for the frame ends? if less than 768 you should be using
> multilink ppp because of fragment issues... I'm pretty sure you can do
> cRTP within the ppp....
>
>
>
> ________________________________
>
> From: cisco-voip-bounces at puck.nether.net
> [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Voll, Scott
> Sent: Wednesday, June 08, 2005 9:49 AM
> To: Yasser Aly
> Cc: cisco-voip at puck.nether.net
> Subject: RE: [cisco-voip] Voice header compression Problem
> withIETFencapsulation
>
>
>
> I had the same problem. The only work around I got from TAC was "don't
> use rtp header compression"........
>
>
>
> Scott
>
>
>
> ________________________________
>
> From: cisco-voip-bounces at puck.nether.net
> [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Yasser Aly
> Sent: Wednesday, June 08, 2005 6:38 AM
> To: cisco-nsp at puck.nether.net; cisco-voip at puck.nether.net
> Subject: [cisco-voip] Voice header compression Problem with
> IETFencapsulation
>
>
>
> Hello,
>
>
>
>   I am trying to apply rtp header compression on a frame-relay
> interface.
>
>
>
> I am using the configuration below but error popping shows that header
> compression is not supported with IETF encapsulation. I have to use IETF
> as the other end of this connection is over ATM interface so Frame-Relay
> to ATM internetworking is in the middle. What can be done to solve this
> problem?
>
>
>
> Configuration Below:
>
> ==============
>
>
>
>
>
> interface Serial0/0
>  no ip address
>  encapsulation frame-relay IETF
>  no fair-queue
>  frame-relay traffic-shaping
>  frame-relay lmi-type ansi
>
>
>
> error message while adding the ip rtp header compression or fr ip rtp
> header compression:
>
>
>
> Router(config)#interface Serial0/0
> Router(config-if)#ip rtp header-compression
>
>
>
> %Interface is set for IETF encapsulation! IP header compression is
> supported only over CISCO encapsulation!
>
>
> Router(config-if)#
>
> Router(config-if)#frame-relay ip rtp header-compression
> %Interface is set for IETF encapsulation! IP header compression is
> supported only over CISCO encapsulation!