RE: Voice QOS on FR

From: Charles McGeoch \(Europe\) (charles.mcgeoch@uk.didata.com)
Date: Thu Sep 20 2007 - 07:22:22 ART


Hi Joseph,

I tried your first solution in my lab at home today, but when I applied
the class-map to the frame-relay DLCI, I got an the following error
message: "Remove frame-relay traffic shaping first before using GTS in
Modular QoS CLI"

When I first looked at your config, I wasn't sure about having shaping
configured both in the map-class and the MQC. So I tried changing the
service-policy line to call the voip-first policy-map (thus removing the
need for the parent policy) however when I did this the router then gave
a different error: " I/f Serial 0/0/0 DLCI 103 class voip-payload
requested 512 (kbps), available only 256 (kbps).

In order to get around this problem I've configured "frame-relay mincir
512000" within the map-class. Would this be a satisfactory solution to
the original question?

Regards
Chaz

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Joseph Brunner
Sent: 20 September 2007 04:24
To: juvenn@hotmail.com; ccielab@groupstudy.com
Subject: RE: Voice QOS on FR

Two ways come to mind;

You can use the MQC and a frame-relay map-class...

class-map match-all voip-payload
 match protocol rtp audio

policy-map voip-first
 class voip-payload
  priority 512
policy-map voip-first-parent
 class class-default
  shape average 512000
  service-policy voip-first

map-class frame-relay DLCI_XXX
 frame-relay cir 512000
 frame-relay bc 5120
 frame-relay fragment 640
 service-policy output voip-first-parent

interface Serial0/3/0
 ip address 10.10.10.1 255.255.255.0
 encapsulation frame-relay
 frame-relay interface-dlci 101
  class DLCI_XXX

or the old school ways...

frame-relay rtp priority

map-class frame-relay DLCI_XXX
 frame-relay cir 512000
 frame-relay bc 5120
 frame-relay fragment 640
 frame-relay ip rtp priority 16384 16383 512
 frame-relay fair-queue

and frame relay priority queueing

access-list 115 permit udp any any range 16384 32767

priority-list 1 protocol ip high list 115

map-class frame-relay DLCI_XXX
 frame-relay cir 512000
 frame-relay bc 5120
 frame-relay priority-group 1

interface Serial0/3/0
 ip address 10.10.10.1 255.255.255.0
 encapsulation frame-relay
  no fair-queue
 frame-relay traffic-shaping
 frame-relay interface-dlci 101
  class DLCI_XXX

Keeping digging in the doc cd...

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
juvenn@hotmail.com
Sent: Wednesday, September 19, 2007 10:13 PM
To: ccielab@groupstudy.com
Subject: Voice QOS on FR

Hi Mate

if i wan to configure QOS Voice for FR , Bandwidth 512k and the queue
given
is 640k

how to gurantee the latency ?

Thanks
Tom



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