03-18-2014 08:07 AM
Hello All. I tried to setup my SG300-28P similarly to my 2960S but using the following commands:
conf t
int range gi1-28
auto qos voip cisco-phone
But there is no similar command that I can find on the SG300. Is anyone familiar with a similar command? Or is QOS a completely manual process on the SG300 ?
I am on firmware version 1.3.7.18
Solved! Go to Solution.
03-20-2014 06:59 PM
Hi Ksuchewie,
There is no auto qos in Cisco small business switches. This feature in catalyst and enterpirce routers only. Cisco small business switch voice vlan by default use DSCP 46 and CoS 5
This mean DSCP in EF 46 mode
my adivce change DSCP to 26 so this will match AF31 low drops. Also I will leave CoS in 5 as well.
I will give you example how to config qos voice vlan in small business siwtch
my example is DATA vlan 1 and voice vlan is 100
quick command
config t
voice vlan id 100
voice vlan cos 5
voice vlan dscp 26
wr mem
Thanks,
Moh
03-20-2014 06:59 PM
Hi Ksuchewie,
There is no auto qos in Cisco small business switches. This feature in catalyst and enterpirce routers only. Cisco small business switch voice vlan by default use DSCP 46 and CoS 5
This mean DSCP in EF 46 mode
my adivce change DSCP to 26 so this will match AF31 low drops. Also I will leave CoS in 5 as well.
I will give you example how to config qos voice vlan in small business siwtch
my example is DATA vlan 1 and voice vlan is 100
quick command
config t
voice vlan id 100
voice vlan cos 5
voice vlan dscp 26
wr mem
Thanks,
Moh
03-21-2014 09:08 AM
Hi Ksuch. The Small Business switch auto voice VLAN manages the QoS for you. So there is 2 ways this works with minimal or no configuration.
#1 the switch employs basic QoS for TAG VLAN packet. This takes the VPT value from within the packet and classifies the traffic.
#2 Auto Voice VLAN will use 46/5 by default. To configure voice VLAN you would make an additional VLAN on the switch then designate it as the voice VLAN voice vlan id xxx in global configuration mode. The Auto Voice VLAN works off of CDP/LDP advertisement.
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