I need to priority the traffic on my switch 3750. I did an service policy and an access group to do this:
class-map match-all rdp match access-group 101 ! policy-map rdp class rdp set ip dscp af41
access-list 101 permit tcp any any eq 3389 access-list 101 permit tcp any eq 3389 any
this is the interface:
interface GigabitEthernet2/0/20 description Link to AP ALM00 switchport trunk encapsulation dot1q switchport mode trunk switchport port-security maximum 2 priority-queue out mls qos trust cos spanning-tree portfast trunk service-policy input rdp - > I can't apply the output
On the 3750, to use its advanced QoS feature you need to globally enable QoS. Once that's done the 3750 provides four egress queues with default traffic mappings. You need to determine whether those defaults are suitable to your needs or amend so so that they are (auto QoS might be an option to use too).
I recall (?) you can only use a service-policy for ingress.
Since you're marking DSCP, you probably want to trust ToS rather than CoS.
If I remember correctly, by default, AF41 will go into the 2nd queue. Also by default, the four hardware queues obtain equal bandwidth (except when you enable PQ, then the 1st queue is PQ). For RDP, you might want to provide it a larger bandwidth guarantee (not that it should need more bandwidth, but to help insure it's dequeued sooner [I also wouldn't use PQ for it]).
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SymptomsFactory reset the switch (running IOS 16.06.05) to default settings.SolutionPower cycle the switch (make sure console cable is connected). Press the Mode button multiple times (that's what worked for me) until the console shows this:Switch:&n...
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