A Couple of QoS Questions

[Patrick McHenry]

Hey -

I applied auto qos to a new 3850 but, I don't see the long list of MLS config that I thought it would generate like the 3750s. Is this hidden config in the 3850 now?

I'm in the middle of reading the 3850 documentation but, I thought I would throw this out there anyway....

Also, it seems that this show run output is showing that auto qos seems to be included by default because it was there even after I applied "no qos auto"

Show run....

...

...

class-map match-any VIDEO
  match ip dscp af41
class-map match-any VOICE
  match ip dscp ef
class-map match-any non-client-nrt-class
  match non-client-nrt
!
policy-map UPLINK
 class VOICE
    priority level 1 percent 10
    police cir percent 10    conform-action transmit     exceed-action drop
 class VIDEO
    priority level 2 percent 20
    police cir percent 20    conform-action transmit     exceed-action drop
 class class-default
    bandwidth remaining percent 100
policy-map port_child_policy
 class non-client-nrt-class
    bandwidth remaining ratio 10
policy-map USER
 class VOICE
    priority level 1 percent 1
    police cir percent 1    conform-action transmit     exceed-action drop
 class VIDEO
    priority level 2 percent 5
    police cir percent 5    conform-action transmit     exceed-action drop
 class class-default
    bandwidth remaining percent 100

Also, When I try to apply the USER policy to an access port in the in direction I get the "configuration failed" message. Isn't that the direction I would want to apply a policy?

Switch(config-if)#service-policy input  USER
priority command is not supported in input direction for this interface
Configuration failed!
Switch(config-if)#service-policy output  USER
Switch(config-if)#

Thanks

[Patrick McHenry]

I have to correct myself - actually the class-maps and policy-maps arent in there by default.

[Reza Sharifi]

Hi Pat,

QOS architecture for the 3850 is compeletly different from the older 3750.  Also, the 3850 runs IOS-XE and not the old IOS.

have a look:

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3850/software/release/3se/qos/configuration_guide/b_qos_3se_3850_cg/b_qos_3se_3850_cg_chapter_011.html

HTH

[Rasika Nayanajith]

You may find some useful information from below link (some of my notes on this topic)

http://mrncciew.com/2013/12/22/3850-qos-part-1/

HTH

Rasika

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[Sukhbir Singh]

policy-map USER
 class VOICE
    priority level 1 percent 1
    police cir percent 1    conform-action transmit     exceed-action drop
 class VIDEO
    priority level 2 percent 5
    police cir percent 5    conform-action transmit     exceed-action drop

In the policy-map USER, you are putting VOICE and VIDEO traffic in the priority queue. VOICE traffic with level 1 and VIDEO with level2. level1 holds the higher priority than level2. It is another way queuing the traffic. Queuing feature is not supported in the ingress direction, which is why its not getting installed.

Regards

Sunny