trunk link settings

[lcaruso]

Hi,

Can someone tell me why you would want to use these settings on a trunk to another switch from a core switch?

I have found some other issues in this evironment regarding switch configurations and I need to determine why this might be done and if it represents a correct configuration for the given environment.

Thanks.

mls qos map cos-dscp 0 8 16 24 32 46 48 56
mls qos srr-queue input bandwidth 70 30
mls qos srr-queue input threshold 1 80 90
mls qos srr-queue input priority-queue 2 bandwidth 30
mls qos srr-queue input cos-map queue 1 threshold 2 3
mls qos srr-queue input cos-map queue 1 threshold 3 6 7
mls qos srr-queue input cos-map queue 2 threshold 1 4
mls qos srr-queue input dscp-map queue 1 threshold 2 24
mls qos srr-queue input dscp-map queue 1 threshold 3 48 49 50 51 52 53 54 55
mls qos srr-queue input dscp-map queue 1 threshold 3 56 57 58 59 60 61 62 63
mls qos srr-queue input dscp-map queue 2 threshold 3 32 33 40 41 42 43 44 45
mls qos srr-queue input dscp-map queue 2 threshold 3 46 47
mls qos srr-queue output cos-map queue 1 threshold 3 4 5
mls qos srr-queue output cos-map queue 2 threshold 1 2
mls qos srr-queue output cos-map queue 2 threshold 2 3
mls qos srr-queue output cos-map queue 2 threshold 3 6 7
mls qos srr-queue output cos-map queue 3 threshold 3 0
mls qos srr-queue output cos-map queue 4 threshold 3 1
mls qos srr-queue output dscp-map queue 1 threshold 3 32 33 40 41 42 43 44 45
mls qos srr-queue output dscp-map queue 1 threshold 3 46 47
mls qos srr-queue output dscp-map queue 2 threshold 1 16 17 18 19 20 21 22 23
mls qos srr-queue output dscp-map queue 2 threshold 1 26 27 28 29 30 31 34 35
mls qos srr-queue output dscp-map queue 2 threshold 1 36 37 38 39
mls qos srr-queue output dscp-map queue 2 threshold 2 24
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 0 1 2 3 4 5 6 7
mls qos srr-queue output dscp-map queue 4 threshold 1 8 9 11 13 15
mls qos srr-queue output dscp-map queue 4 threshold 2 10 12 14
mls qos queue-set output 1 threshold 1 100 100 50 200
mls qos queue-set output 1 threshold 2 125 125 100 400
mls qos queue-set output 1 threshold 3 100 100 100 400
mls qos queue-set output 1 threshold 4 60 150 50 200
mls qos queue-set output 1 buffers 15 25 40 20
mls qos
interface GigabitEthernet2/1/1
 switchport trunk encapsulation dot1q
 switchport mode trunk
 srr-queue bandwidth share 1 30 35 5
 queue-set 2
 priority-queue out 
 mls qos trust dscp
 auto qos trust dscp

[lcaruso]

Actually I just noticed they have the exact same setting (no trunk) going to some access ports as well.

interface GigabitEthernet3/0/46
 switchport access vlan 50
 switchport mode access
 switchport nonegotiate
 switchport voice vlan 2
 srr-queue bandwidth share 1 30 35 5
 queue-set 2
 priority-queue out 
 mls qos trust cos
 auto qos trust cos
 spanning-tree portfast

[Wilson Bonilla]

Hello Sir.

That's someone lazy : ), doing a interface range command from global configuration mode and pasting the configuration just once for all interfaces.

Regards.

Wilson B.

[HBernard]

Not only lazy, but lazily wrong.  The config on the interface shows:

interface GigabitEthernet2/1/1

switchport trunk encapsulation dot1q

switchport mode trunk

srr-queue bandwidth share 1 30 35 5

queue-set 2

priority-queue out

mls qos trust dscp

auto qos trust dscp

Unless the full configuration wasn't posted, there is no queue-set 2 defined.

Regards.

HB

[paul driver]

Hello

The configuration is part of mls qos and it looks like its auto mls qos macro features.

srr priority queuing is enabled with define input traffic for these interfaces set to queue 2 .
Also output queuing bw sharing is set for the 4 queues


Res
Paul

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