QoS per VLAN

[gcook0001]

We are currently running two Catalyst C3850 switches in a non-stacking configuration. 

Show version:Cisco IOS Software [Denali], Catalyst L3 Switch Software (CAT3K_CAA-UNIVERSALK9-M), Version 16.3.7, RELEASE SOFTWARE (fc4)

We would like to setup per vlan qos for a number of ports on our switches.  All the traffic on the vlan is encrypted at the source in both directions.

We want to give vlan 100 the highest priority.   I pieced this together from documentation but would like to have some feed-back.

class-map vlan100
match vlan 100
exit

policy-map vlan100
policy-map class vlan100
priority level 1
exit

interface gigabitethernet 1/0/1
description Connection to office switch
switchport trunk allowed vlan 100, 101, 102
switchport mode trunk
service-policy input vlan100
service-policy output vlan100
exit
interface gigabitethernet 1/0/2
description Connection to firewall
switchport trunk allowed vlan 100, 101, 102
switchport mode trunk
service-policy input vlan100
service-policy output vlan100
exit

thanks

[Georg Pauwen]

Hello,

the config looks fine to me (except one small syntax change which I marked in bold. I am not sure if you can apply the service policy outbound, it the system gives you an error, just use it inbound only.

class-map vlan100
match vlan 100
exit

policy-map vlan100
class vlan100
priority level 1
exit

interface gigabitethernet 1/0/1
description Connection to office switch
switchport trunk allowed vlan 100, 101, 102
switchport mode trunk
service-policy input vlan100
service-policy output vlan100
exit
interface gigabitethernet 1/0/2
description Connection to firewall
switchport trunk allowed vlan 100, 101, 102
switchport mode trunk
service-policy input vlan100
service-policy output vlan100
exit

[gcook0001]

OK.  This did not work.  When I tried adding the service policy to the interface I got the following error.

Queuing actions supported only with dscp/cos/qos-group/precedence/exp based classification

I am doing more research but if anyone has any ideas on this I would appreciate it.

[Georg Pauwen · Accepted solution]

Hello,

it doesn't seem to like the priority. Try the below:

policy-map vlan100
class vlan100
set dscp 46 or set dscp ef

[gcook0001]

Thanks. That seems to have worked