QoS global configuration versus per port

[Colin Craig]

setting up 3750's for voip. here is an example of my config per port.

interface FastEthernet0/2

description Trunk to phone-pc data vlan 10 voice vlan 20

switchport trunk encapsulation dot1q

switchport trunk native vlan 10

switchport trunk allowed vlan 10,20

switchport mode trunk

srr-queue bandwidth share 10 20 40 30

srr-queue bandwidth shape 10 0 0 0

priority-queue out

mls qos trust dscp

spanning-tree portfast trunk

My Question is "Can I set the srr-queue bandwidth and share and shape globally?"

also if I don't put anything in does it take the global defaults? ie. srr shared 25 25 25 25 and shaped 25 0 0 0.

[szahid]

My Question is "Can I set the srr-queue bandwidth and share and shape globally?"

[Salman] You cannot set queue specific parameters gloablly. So the answer to your question is no.

also if I don't put anything in does it take the global defaults? ie. srr shared 25 25 25 25 and shaped 25 0 0 0.

[Salman]

These values are actually also what is called as "port defaults" , not global defaults.

You can always use a range command to apply such config on multiple ports at the same time if you think having to do it on each individual port is inefficient.

hope this helps.

thanks

Salman.

[royalblues]

Craig,

You cannot set the srr-queue bandwidth and share globally. these needs to be specified on the interface.

The options that are available globally with the srr-queue would be the cos-dscp to queue mappings

If we do noy put configure the above values on the interface, the default percentages would be taken i.e srr shared 25 25 25 25 and shaped 25 0 0 0

you can verify this by issuing the following command

MS_MIL_TD_CORE#sh mls qos interface queueing

GigabitEthernet1/0/1

Egress Priority Queue : disabled

Shaped queue weights (absolute) : 25 0 0 0

Shared queue weights : 25 25 25 25

The port bandwidth limit : 100 (Operational Bandwidth:100.0)

The port is mapped to qset : 1

GigabitEthernet1/0/2

Egress Priority Queue : disabled

Shaped queue weights (absolute) : 25 0 0 0

Shared queue weights : 25 25 25 25

The port bandwidth limit : 100 (Operational Bandwidth:100.0)

The port is mapped to qset : 1

HTH, rate if it does

Narayan