THere are reports of poor audio at this site on Polycom VOIP phone.
QOS appears to be setup correctly using LLQ.
When I look at the service-policy output on serial, it seems to indicate there is CS5 traffic in the default-queue, but nearly no packets in the VOIP que. Look at this output, is it true that packets marked CS5 are showing upo in default que ?
Serial0/0/0:0
Service-policy output: QOS-EDGE
queue stats for all priority classes:
Queueing
queue limit 64 packets
(queue depth/total drops/no-buffer drops) 0/0/0
(pkts output/bytes output) 370/53194
Class-map: VOICE-TP (match-any)
370 packets, 53194 bytes
5 minute offered rate 0000 bps, drop rate 0000 bps
Match: ip dscp ef (46)
370 packets, 53194 bytes
5 minute rate 0 bps
Match: ip dscp cs4 (32)
0 packets, 0 bytes
5 minute rate 0 bps
Priority: 45% (691 kbps), burst bytes 17250, b/w exceed drops: 0
Class-map: VOICE-CONTROL (match-any)
71920 packets, 60413494 bytes
5 minute offered rate 1000 bps, drop rate 0000 bps
Match: ip dscp af31 (26)
42 packets, 4664 bytes
5 minute rate 0 bps
Match: ip dscp cs3 (24)
71878 packets, 60408830 bytes
5 minute rate 1000 bps
Queueing
queue limit 64 packets
(queue depth/total drops/no-buffer drops) 0/0/0
(pkts output/bytes output) 71920/60413494
bandwidth 5% (76 kbps)
Class-map: class-default (match-any)
7952723 packets, 1506140475 bytes
5 minute offered rate 117000 bps, drop rate 0000 bps
Match: any
Queueing
queue limit 64 packets
(queue depth/total drops/no-buffer drops/flowdrops) 0/493/0/0
(pkts output/bytes output) 7987939/1522050104
Fair-queue: per-flow queue limit 16 packets
Exp-weight-constant: 9 (1/512)
Mean queue depth: 0 packets
dscp Transmitted Random drop Tail/Flow drop Minimum Maximum Mark
pkts/bytes pkts/bytes pkts/bytes thresh thresh prob
default 6144806/1139948538 459/392582 33/1452 20 40 1/10
af11 456/58621 0/0 0/0 32 40 1/10
af21 129/16376 0/0 0/0 32 40 1/10
cs3 5/4279 0/0 0/0 26 40 1/10
cs5 1466810/298599872 0/0 0/0 30 40 1/10 <-- WHY is CS5 traffic here ?
cs6 375897/83461746 1/112 0/0 32 40 1/10
QOS
class-map match-any VOICE-CONTROL
match ip dscp af31
match ip dscp cs3
class-map match-any VIDEO-CONFERENCE
match ip dscp af41
class-map match-any VOICE-TP
match ip dscp ef
match ip dscp cs4
!
policy-map QOS-EDGE
class VIDEO-CONFERENCE
bandwidth percent 10
class VOICE-TP
priority percent 45
class VOICE-CONTROL
bandwidth percent 5
class class-default
fair-queue
random-detect dscp-based
!
interface Serial0/0/0:0
description T1 to RTFLWNTCD01-S3-1-1-19:1
ip address 10.192.55.250 255.255.255.252
ip pim sparse-dense-mode
service-policy output QOS-EDGE
Is this becuase the 3500 switch doesnt have a COS-DSCP map setup for COS5 = DSCP=46 ?
router:
Cos-dscp map:
cos: 0 1 2 3 4 5 6 7
--------------------------------
dscp: 0 8 16 26 32 46 48 56
switch 3560:
Cos-dscp map:
cos: 0 1 2 3 4 5 6 7
--------------------------------
dscp: 0 8 16 24 32 40 48 56
