11-08-2005 01:05 AM - edited 03-03-2019 10:54 AM
I am trying to configure QoS on the above routers and since they do not have AutoQoS I am doing a map-class frame-relay but the link becomes inaccessible after about 2 minutes. I am using the following configuration syntax below:
ip rtp header-compression iphc-format
frame-relay traffic-shaping
int s1/0:1.1 point-to-point
frame-relay class voice
map-class frame-relay voice
frame-relay cir 256000
frame-relay mincir 72000
frame-relay fragment 320
frame-relay fair-queue
ip rtp priority 16384 16383 72000
With all these it goes off after about 3 minutes and thus the link becomes unaccessible.
Can someone give me syntax for the two routers which will work.
11-14-2005 06:35 AM
Looking at the configuration, I would suggest two things.
1.The map class has to be associated with a major interface.but in ur config, it is associated with a sub-interface.
So, to modify this , give the no cmd of frame-relay class voice at the subinterface level and apply it to the major intf serial0/0 as
(conf -if)#frame-relay class voice.
2.In your example, i m not able to see frame-relay traffic-rate "average value" , "peak value " cmd. If you are using frame-relay adaptive-shaping becn cmd, then no need for frame-relay traffic-rate cmd.
Try out these 2 options . If the problem still persists, tell us the following info:
you are using PVC or SVC?
11-14-2005 09:17 AM
For voice on frame relay Cisco recommends that you not allow bursting past your CIR, so your cir and mincir should be the same. If you know your carrier never discards burst packets you may be able to violate this rule. The bc value should also be 1/100 of the CIR to reduce jitter.
Here is a production config for a 128 kb CIR frame circuit with fragmentation and header compression.
class-map match-any voice
description Voice
match ip dscp ef
match access-group 103
!
class-map match-all voicecontrol
description VoiceControl
match ip dscp af31
!
access-list 103 permit udp any any range 16384 32767
!
policy-map voice128
class voice
priority 64
class voicecontrol
bandwidth 8
class class-default
fair-queue
random-detect dscp-based
!
map-class frame-relay 128CIRvoice
frame-relay adaptive-shaping becn
frame-relay cir 128000
frame-relay bc 1280
frame-relay mincir 128000
service-policy output voice128
frame-relay fragment 400
!
interface Serial2/1:1
bandwidth 768
no ip address
encapsulation frame-relay
frame-relay traffic-shaping
frame-relay lmi-type ansi
!
interface Serial2/1:1.5 point-to-point
bandwidth 256
ip address 10.254.0.213 255.255.255.252
frame-relay class 128CIRvoice
frame-relay interface-dlci 675
frame-relay ip rtp header-compression
11-15-2005 11:21 PM
I am now being faced with a situation where when i configure this interface with this working configuration it stops workings so i have to go in and reload the router for it to work again. I am doing this on both remote and head office routers. it is only that the Head Office Router has 8 different links on the same interface.
The other problem is that we are not using Cisco IP Phones, so i have to allow ports for Nortel IP phones and they are as below:
the UDP Ports used by Our Meridian IP Telephony System:
5000 - 5263 - IP Telephony Ports.
4100 and 4001 - Meridian Registration Ports
What do I need to do in order to get the link not to go down with the above configuration and at the same time use the Nortel IP phones well.
The link is 256K
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