Hi, Cisco gurus I'm wondering if someone can help me solve a problem I'm having. This problem has been going on for over 1 year I have talked with Cisco, ISP, Mitel and the problem is still not resolved. Our network is not a complex one. We have a host site which is connected to 6 remote sites via MPLS, Norlight is the ISP. At each site is a Mitel 3300 VoIP system.
At the host site we have an IMA group (ATM) 3mbs connection and at the remote sites we have 1.5mbs Frame connections.
The symptoms of the problems are this. High jitter and garbled sounding voices on both ends. The problem seems more sever on the host site end near the IMA group. The calls break up like you hear every other word. I checked the bandwidth usage on the host router and it is not even 1mps most of the time. The remote routers show 200 or 300 kps most of the time.
There are some traffic shaping drops outbound from the host site but they are less then 1%.
The policy map is not showing any drops.
I have asked the ISP about implementing FRF.12 they do not support it.
Let me know if you need me to post any more information.
Host site config
class-map match-all Wan-RTP
match access-group name Voice-ACL
class-map match-any Lan-Ingress-RTP-COS-6-DSCP-44
match dscp 44
match cos 6
class-map match-any Lan-Ingress-RTP
match dscp ef
class-map match-all Lan-Policy-Egress-Set-COS-6
match access-group name Voice-ACL-BranchPlants
!
!
policy-map Wan-Policy-Voice-PVC
class Wan-RTP
priority percent 75
set dscp ef
class class-default
fair-queue
random-detect
policy-map Lan-Policy-Egress
class Lan-Policy-Egress-Set-COS-6
set cos 6
interface ATM0/IMA0
no ip address
load-interval 30
no atm ilmi-keepalive
!
interface ATM0/IMA0.100 point-to-point
description PVC to Norlight MPLS Network VPI/VCI 5/100 - Voice
ip address 192.168.1.2 255.255.255.252
ip flow ingress
pvc 5/100
vbr-nrt 3072 3072
tx-ring-limit 7
oam-pvc manage
encapsulation aal5snap
service-policy output Wan-Policy-Voice-PVC
!
Remote site configs:
policy-map Wan-Policy-Voice
class Wan-RTP
priority percent 75
set dscp ef
class class-default
fair-queue
random-detect
set dscp default
policy-map Lan-Policy-Ingress
class Lan-Ingress-RTP
set dscp ef
class class-default
set dscp default
!
interface Serial0/0
description 768K to Waverly, OH
bandwidth 1536
no ip address
encapsulation frame-relay IETF
ip route-cache flow
no fair-queue
service-module t1 timeslots 1-24
frame-relay traffic-shaping
frame-relay lmi-type ansi
!
interface Serial0/0.100 point-to-point
description PVC to Norlight's MPLS Network DLCI 100 - Voice
bandwidth 1536
ip address 192.168.1.14 255.255.255.252
frame-relay interface-dlci 100 IETF
class VoIP-QoS
map-class frame-relay VoIP-QoS
frame-relay cir 1536000
frame-relay bc 15360
frame-relay be 0
frame-relay mincir 1536000
service-policy output Wan-Policy-Voice
