Hi
We are using Unify phones unfortunately and not Cisco phones. I presume setting the interface and uplink to auto qos trust dscp would not do the trick if it is not Cisco?
Once the phones are marking with EF DSCP at the source (most do but check it with wireshark) then trusting DSCP will work fine as phones starts it off and access/uplink honour it , only if your using Cisco phones would you use the trust Cisco phone option
And you say the 3850 would build the rest of the config? I did see something happening on the interfaces when i was messing around. What about the actual QoS table so to speak??
That second link I provided shows exactly what table gets built depending on the actual commands you enter , so if you used trust dscp , this below would be added globally , its auto qos so whatever you pick a table will be built for it by the switch , can easily be changed removed , so you could test what works bets for you
Example: auto qos trust dscp
The following is an example of the auto qos trust dscp command and the applied policies and class maps.
The following policy maps are created and applied when running this command:
- AutoQos-4.0-Trust-Dscp-Input-Policy
- AutoQos-4.0-Output-Policy
The following class maps are created and applied when running this command:
- class-default (match-any)
- AutoQos-4.0-Output-Priority-Queue (match-any)
- AutoQos-4.0-Output-Control-Mgmt-Queue (match-any)
- AutoQos-4.0-Output-Multimedia-Conf-Queue (match-any)
- AutoQos-4.0-Output-Trans-Data-Queue (match-any)
- AutoQos-4.0-Output-Bulk-Data-Queue (match-any)
- AutoQos-4.0-Output-Scavenger-Queue (match-any)
- AutoQos-4.0-Output-Multimedia-Strm-Queue (match-any)
Switch(config)# interface GigabitEthernet1/0/18
Switch(config-if)# auto qos trust dscp
Switch(config-if)# end
Switch#show policy-map interface GigabitEthernet1/0/18
GigabitEthernet1/0/18
Service-policy input: AutoQos-4.0-Trust-Dscp-Input-Policy
Class-map: class-default (match-any)
Match: any
QoS Set
dscp dscp table AutoQos-4.0-Trust-Dscp-Table
Service-policy output: AutoQos-4.0-Output-Policy
queue stats for all priority classes:
Queueing
priority level 1
(total drops) 0
(bytes output) 0
Class-map: AutoQos-4.0-Output-Priority-Queue (match-any)
Match: dscp cs4 (32) cs5 (40) ef (46)
Match: cos 5
Priority: 30% (300000 kbps), burst bytes 7500000,
Priority Level: 1
Class-map: AutoQos-4.0-Output-Control-Mgmt-Queue (match-any)
Match: dscp cs3 (24) cs6 (48) cs7 (56)
Match: cos 3
Queueing
queue-limit dscp 16 percent 80
queue-limit dscp 24 percent 90
queue-limit dscp 48 percent 100
(total drops) 0
(bytes output) 0
bandwidth remaining 10%
queue-buffers ratio 10
Class-map: AutoQos-4.0-Output-Multimedia-Conf-Queue (match-any)
Match: dscp af41 (34) af42 (36) af43 (38)
Match: cos 4
Queueing
(total drops) 0
(bytes output) 0
bandwidth remaining 10%
queue-buffers ratio 10
Class-map: AutoQos-4.0-Output-Trans-Data-Queue (match-any)
Match: dscp af21 (18) af22 (20) af23 (22)
Match: cos 2
Queueing
(total drops) 0
(bytes output) 0
bandwidth remaining 10%
queue-buffers ratio 10
Class-map: AutoQos-4.0-Output-Bulk-Data-Queue (match-any)
Match: dscp af11 (10) af12 (12) af13 (14)
Match: cos 1
Queueing
(total drops) 0
(bytes output) 0
bandwidth remaining 4%
queue-buffers ratio 10
Class-map: AutoQos-4.0-Output-Scavenger-Queue (match-any)
Match: dscp cs1 (8)
Queueing
(total drops) 0
(bytes output) 0
bandwidth remaining 1%
queue-buffers ratio 10
Class-map: AutoQos-4.0-Output-Multimedia-Strm-Queue (match-any)
Match: dscp af31 (26) af32 (28) af33 (30)
Queueing
(total drops) 0
(bytes output) 0
bandwidth remaining 10%
queue-buffers ratio 10
Class-map: class-default (match-any)
Match: any
Queueing
(total drops) 0
(bytes output) 0
bandwidth remaining 25%
queue-buffers ratio 25
