Hi Team
I have these Catalyst 3550 switches with WRR configured to give
strict priority to VoIP traffic.
My problem is that I haven't been able to find a command
to show me statistics for all 4 different outgoing queues
on the interface (something similar to LLQ show policy-map
for an interface).
In my configuration I'm either trusting all IP-Phones ToS
or trusting DSCP comming from servers. I expect DSCP to be
mapped to a COS value and then COS to the right queue in
the outgoing interface of the switch. In theory, the
configuration is ready but I don't have a way to verify if
VoIP traffic is really using the strict priority queue (#4).
Any ideas?
Here you have the config for a port with a CCM connected
to it:
!
interface FastEthernet0/2
description Call Mgr
switchport access vlan 15
switchport mode dynamic desirable
mls qos trust dscp
auto qos voip trust
wrr-queue bandwidth 10 20 70 1
wrr-queue min-reserve 1 5
wrr-queue min-reserve 2 6
wrr-queue min-reserve 3 7
wrr-queue min-reserve 4 8
wrr-queue cos-map 1 0 1
wrr-queue cos-map 2 2 4
wrr-queue cos-map 3 3 6 7
wrr-queue cos-map 4 5
priority-queue out
end
and some global commands:
mls qos map cos-dscp 0 8 16 26 32 46 48 56
mls qos min-reserve 5 170
mls qos min-reserve 6 85
mls qos min-reserve 7 51
mls qos min-reserve 8 34
mls qos
I was able to get these statistics (nothing that
explicitly shows a total of bytes or packets sent to each
one of the 4 outgoing queues).
3550sw#sh mls qos interface fastEthernet 0/2 queueing
FastEthernet0/2
Egress expedite queue: ena
wrr bandwidth weights:
qid-weights
1 - 10
2 - 20
3 - 70
4 - 1 when expedite queue is disabled
Cos-queue map:
cos-qid
0 - 1
1 - 1
2 - 2
3 - 3
4 - 2
5 - 4
6 - 3
7 - 3
3550sw#sh mls qos interface fastEthernet 0/2 statistics
FastEthernet0/2
Ingress
dscp: incoming no_change classified policed
dropped (in bytes)
Others: 3842249 3842249 0 0 0
Egress
dscp: incoming no_change classified policed
dropped (in bytes)
Others: 4133666 n/a n/a 0 0
3550sw#sh mls qos interface fastEthernet 0/2
FastEthernet0/2
trust state: trust dscp
trust mode: trust dscp
COS override: dis
default COS: 0
DSCP Mutation Map: Default DSCP Mutation Map
Trust device: none
Enrique Waizel
