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3750 to 3850 QoS commands

3750 to 3850 QoS commands

3750 to 3850 QoS commands


Is there a config guide or other source someone can recommend for this. I have a lot of 3750 switches that are being refreshed with 3850 and I want to make sure the QoS settings are carried over properly. Been awhile since I worked with Cisco so my knowledge is a little rusty. Here is an example of the config from an interface on the 3750

interface range GigabitEthernet1/0/23 - 24
description VLAN 222 Device
switchport access vlan 80
switchport mode access
switchport voice vlan 60
srr-queue bandwidth share 1 70 25 5
priority-queue out
mls qos trust dscp
spanning-tree portfast

RE: 3750 to 3850 QoS commands

The differences in the QoS configurations between the two platforms is fairly big. The 3650/3850 is more or less like configuring a fully fledged router - requiring ingress and egress service policies. I have done some work with this for several customers as well as comparing the generated AutoQoS configurations between the two and then customising the output.
There is a guide on CCO here - https://www.cisco.com/c/en/us/support/docs/switche... that should help you out. As you are simply enabling the egress strict priority queue (priority-quie out) and trusting the incoming DSCP values (mls qos trust dscp) it shouldn't be too difficult.


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