More 3750 QoS Problems

[Mark Bowyer]

Ok, I can see that my traffic is hitting the right queues, but it doesnt seem to be taking priority over other traffic, either that or it is being limited somewhere. I am marking video with dscp 34, voice with dscp 46 and control with 24. I have done several test calls using 2 video conferencing units. I have applied QoS on all devices in the path. The units I am testing on are only seperated by 1 WAN link. I have looked at my queues  and thresholds etc, but I cant understand what the hell is going on. I am doing file transfers to top the link out and on the video conferencing unit its self, I am seeing a lot of receive packet loss and a very small amount of transmit packet loss. Can anyone see from my config what might be going wrong with the queues and thresholds etc?

mls qos map cos-dscp 0 8 16 26 32 46 48 56

mls qos srr-queue input bandwidth 90 10

mls qos srr-queue input threshold 1 8 16

mls qos srr-queue input threshold 2 34 66

mls qos srr-queue input buffers 67 33

mls qos srr-queue input cos-map queue 1 threshold 2  1

mls qos srr-queue input cos-map queue 1 threshold 3  0

mls qos srr-queue input cos-map queue 2 threshold 1  2

mls qos srr-queue input cos-map queue 2 threshold 2  4 6 7

mls qos srr-queue input cos-map queue 2 threshold 3  3 5

mls qos srr-queue input dscp-map queue 1 threshold 2  9 10 11 12 13 14 15

mls qos srr-queue input dscp-map queue 1 threshold 3  0 1 2 3 4 5 6 7

mls qos srr-queue input dscp-map queue 1 threshold 3  32

mls qos srr-queue input dscp-map queue 2 threshold 1  16 17 18 19 20 21 22 23

mls qos srr-queue input dscp-map queue 2 threshold 2  33 34 35 36 37 38 39 48

mls qos srr-queue input dscp-map queue 2 threshold 2  49 50 51 52 53 54 55 56

mls qos srr-queue input dscp-map queue 2 threshold 2  57 58 59 60 61 62 63

mls qos srr-queue input dscp-map queue 2 threshold 3  24 25 26 27 28 29 30 31

mls qos srr-queue input dscp-map queue 2 threshold 3  40 41 42 43 44 45 46 47

mls qos srr-queue output cos-map queue 1 threshold 3  5

mls qos srr-queue output cos-map queue 2 threshold 3  3 6 7

mls qos srr-queue output cos-map queue 3 threshold 3  2 4

mls qos srr-queue output cos-map queue 4 threshold 2  1

mls qos srr-queue output cos-map queue 4 threshold 3  0

mls qos srr-queue output dscp-map queue 1 threshold 3  34 40 41 42 43 44 45 46

mls qos srr-queue output dscp-map queue 2 threshold 3  24 25 26 27 28 29 30 31

mls qos srr-queue output dscp-map queue 2 threshold 3  48 49 50 51 52 53 54 55

mls qos srr-queue output dscp-map queue 2 threshold 3  56 57 58 59 60 61 62 63

mls qos srr-queue output dscp-map queue 3 threshold 3  16 17 18 19 20 21 22 23

mls qos srr-queue output dscp-map queue 3 threshold 3  32 33 35 36 37 38 39

mls qos srr-queue output dscp-map queue 4 threshold 1  8

mls qos srr-queue output dscp-map queue 4 threshold 2  9 10 11 12 13 14 15

mls qos srr-queue output dscp-map queue 4 threshold 3  0 1 2 3 4 5 6 7

mls qos queue-set output 1 threshold 1 138 138 92 138

mls qos queue-set output 1 threshold 2 138 138 92 400

mls qos queue-set output 1 threshold 3 36 77 100 318

mls qos queue-set output 1 threshold 4 20 50 67 400

mls qos queue-set output 2 threshold 1 149 149 100 149

mls qos queue-set output 2 threshold 2 118 118 100 235

mls qos queue-set output 2 threshold 3 41 68 100 272

mls qos queue-set output 2 threshold 4 42 72 100 242

mls qos queue-set output 1 buffers 10 10 26 54

mls qos queue-set output 2 buffers 16 6 17 61

class-map match-any voice

match ip dscp 46

class-map match-any video

match ip dscp 34

class-map match-any control

match ip dscp 24

class-map match-any control-VoIP

match ip dscp 26

policy-map vvc-map

class voice

trust dscp

class video

trust dscp

class control

trust dscp

class control-VoIP

trust dscp

****Interface config****

priority-queue out

service-policy input vvc-map

[acampbell]

Mark,

Try enabling ingress Q2 as the priority Q

!

mls qos srr-queue input priority-queue 2 bandwidth 30

! Q2 is enabled as a strict-priority ingress queue with 30% BW

!

From the link I sent you before

http://www.cisco.com/en/US/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND_40/QoSCampus_40.html#wp1098448

Cisco suggest that you look at your q-ing and map your selected cos & dscp values

!
! This section configures the ingress queues
!
mls qos srr-queue input priority-queue 2 bandwidth 30
! Q2 is enabled as a strict-priority ingress queue with 30% BW
!
C3750-E(config)#mls qos srr-queue input bandwidth 70 30
! Q1 is assigned 70% BW via SRR shared weights
! Q2 SRR shared weight is ignored (as it has been configured as a PQ)
!
mls qos srr-queue input buffers 90 10
! Q1 is assigned 90% of queuing buffers and Q2 (PQ) is assigned 10%
!
mls qos srr-queue input threshold 1 80 90
! Q1 thresholds are configured at 80% (Q1T1) and 90% (Q1T2)
! Q1T3 is implicitly set at 100% (the tail of the queue)
! Q2 thresholds are all set (by default) to 100% (the tail of Q2)
! This section configures ingress CoS-to-Queue mappings (if required)
!
mls qos srr-queue input cos-map queue 1 threshold 1 0 1 2
! CoS values 0, 1 and 2 are mapped to Q1T1
!
mls qos srr-queue input cos-map queue 1 threshold 2 3
! CoS value 3 is mapped to ingress Q1T2
!
mls qos srr-queue input cos-map queue 1 threshold 3 6 7
! CoS values 6 and 7 are mapped to ingress Q1T3
!
mls qos srr-queue input cos-map queue 2 threshold 1 4 5
! CoS values 4 and 5 are mapped to ingress Q2 (the PQ)
! This section configures ingress DSCP-to-Queue Mappings
!
mls qos srr-queue input dscp-map queue 1 threshold 1 0 8 10 12 14
! DSCP DF, CS1 and AF1 are mapped to ingress Q1T1
!
mls qos srr-queue input dscp-map queue 1 threshold 1 16 18 20 22
! DSCP CS2 and AF2 are mapped to ingress Q1T1
!
mls qos srr-queue input dscp-map queue 1 threshold 1 26 28 30 34 36 38
! DSCP AF3 and AF4 are mapped to ingress Q1T1
!
mls qos srr-queue input dscp-map queue 1 threshold 2 24
! DSCP CS3 is mapped to ingress Q1T2
!
mls qos srr-queue input dscp-map queue 1 threshold 3 48 56
! DSCP CS6 and CS7 are mapped to ingress Q1T3 (the tail of Q1)
!
mls qos srr-queue input dscp-map queue 2 threshold 3 32 40 46
! DSCP CS4, CS5 and EF are mapped to ingress Q2T3 (the tail of the PQ)
!

Then read further on for output Qs

Regards,
Alex.
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