07-25-2007 10:56 AM - edited 03-05-2019 05:29 PM
Hi,
Am working on implementing QoS in a building in our district. Which switches need this command: ?mls qos trust dscp? and what switch needs ?Auto Qos? enabled?
Here is the breakdown of this buildings network:
1 - Cat 3750 - core switch w/ IP routing enabled (only 12 gig ports)
4 - Cat 3560 - access switches with PoE ports for our phones and some data ports
4 - Cat 3550 - access switches - data ports
2 - Cat 2950 - access switches - data ports
Here is the auto QoS config from the Cat3560 ? an access layer switch.
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 40 41 42 43 44 45 46 47
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 34 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
mls qos
!
!
(text deleted)
!
interface FastEthernet0/1
description VLAN 110: IP phone
power inline never
switchport access vlan 110
switchport mode access
srr-queue bandwidth share 10 10 60 20
srr-queue bandwidth shape 10 0 0 0
mls qos trust device cisco-phone
mls qos trust cos
auto qos voip cisco-phone
spanning-tree portfast
!
interface FastEthernet0/2
description VLAN 110: IP phone
power inline never
switchport access vlan 110
switchport mode access
srr-queue bandwidth share 10 10 60 20
srr-queue bandwidth shape 10 0 0 0
mls qos trust device cisco-phone
mls qos trust cos
auto qos voip cisco-phone
spanning-tree portfast
Should Auto Qos be enabled on each switch that supports it?
Thanks for any help
Dan
07-25-2007 06:08 PM
I also recommend "auto qos voip trust" configured on your 3560's uplink port to the 3750G-12S.
Do you also have CCM server connected somewhere? Or are you using CME?
07-25-2007 07:08 PM
Thanks for the tip. I'll put it in there tomorrow. By CCM do you mean cisco call manager. Or is CME - Call manager express?
Dan
07-25-2007 07:16 PM
I have "auto qos voip trus" configured on one of the 3560 switch's uplink ports. Do you think I need the massive config of auto qos --mls qos map....mls qos srr-queue input bandwidth....all of those commands generated from auto qos. Do I need those on the 3560 or on the 3750 Core switch?
A cisco engineer working on our other buildings in our district sent a sample config for a 3560 with these configs (a short config):
msl qos map cos-dscp 0 8 16 24 32 46 48 56
mls qos map ip-prec-dscp 0 8 1624 32 46 48 56
mls qos
(text deleted)
interface fa0/1
description ip phone
switchport access vlan110
switchport mode access
priority queue-out
mls qos trust dscp
spanning-tree portfast
We as a staff asked for help since he wasn't contracted to program this building.
What do you think of the above config?
Thanks,
Dan
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