12-13-2010 09:20 AM - edited 03-06-2019 02:30 PM
hi! currently i've a few c3560 switches in
our environment. There isnt' any qos configured and the interface of
the switch is configured as below:
Interface GigaEthernet0/x
switchport access vlan xx
switchport mode access
switchport voice vlan xx
no mdix auto
spanning-tree portfast.
It works fine with the cisco ip phone now. I'm trying to put in some qos with the command "auto qos voip cisco-phone" in the interfaces. My question is what impact will i have? Will it affect the current voice quality? I tried this on the test switch, and there are alot of command automatically generated as below.....I tried to do a no auto qos voip cisco-phone on one of the interface (this command is totally removed in the interfaces), but these command below is still there. Will it affect any voice function in real life? Thanks.
mls qos map policed-dscp 24 26 46 to 0
mls qos map cos-dscp 0 8 16 24 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
12-13-2010 09:37 AM
Auto qos works rather well on the 3560.
The only reasons not to use it are because your qos requirements are more extensive or more complex.
You'd better be a qos expert before attempting this path.
regards,
Leo
12-15-2010 07:09 AM
hi! basically, the auto qos shd work fine unless i've more complex requirements, is that right?
thx.
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