Nexus 7K 6.1 code and F2 series module how to enable priority queue for IPT

aacole · ‎07-08-2012

Hi,

I have a 7K running 6.1 code, on F series line cards. I need to set it to prioritise DSCP EF marked traffic, that's all at this stage, but am unclear on the configuration steps required. The packets will already be marked, I just need to ensure they end up in a priority queue.

Anyone done this who can point me at an example configuration, I need a starting point.

krun_shah · ‎07-08-2012

Here is cofiguration guide for qos

http://www.cisco.com/en/US/docs/switches/datacenter/sw/6_x/nx-os/qos/configuration/guide/queuing.html#wp1101680

Sent from Cisco Technical Support iPhone App

aacole · ‎07-10-2012

Thanks for the reply, I had already had a look through that manual, and made a start, but it didnt work. Now back at site, taken another look at this and come up with the following:

qos copy policy type queuing default-4q-8e-out-policy prefix 20G-EGRESS-

sh policy-map type queuing 20G-EGRESS-4q-8e-out

! Enter policy config mode:
policy-map type queuing 20G-EGRESS-4q-8e-out

! show the default queuing policy map created:

sh policy-map type queuing 20G-EGRESS-4q-8e-out

Type queuing policy-maps
========================

policy-map type queuing 20G-EGRESS-4q-8e-out
    class type queuing 1p3q1t-8e-out-pq1
      priority level 1
    class type queuing 1p3q1t-8e-out-q2
      bandwidth remaining percent 33
    class type queuing 1p3q1t-8e-out-q3
      bandwidth remaining percent 33
    class type queuing 1p3q1t-8e-out-q-default
      bandwidth remaining percent 33

! Apply to an interface:

int po3
service-policy type queuing output 20G-EGRESS-4q-8e-out

sh run int po3

!Command: show running-config interface port-channel3
!Time: Tue Jul 10 16:07:55 2012

version 6.0(3)

interface port-channel3
description *** VPC Uplink to SeminarA ***
switchport
switchport mode trunk
switchport trunk native vlan 499
switchport trunk allowed vlan 300-302,310-314,320-323,350,353
switchport trunk allowed vlan add 400,499,999
service-policy type queuing output 20G-EGRESS-4q-8e-out
vpc 3

! To show the cos to queue mapppings, check one of the port channel physical

members:

sh queuing interface e3/3

Egress Queuing for Ethernet3/3 [Interface]
-------------------------------------------
Template: 4Q8E
-------------------------------------------------
Que# Group Bandwidth% PrioLevel Shape%     CoSMap
-------------------------------------------------
   0     0          -      High      -        5-7
   1     1         33         -      -        3-4
   2     2         33         -      -        1-2
   3     3         33         -      -          0

Ingress Queuing for Ethernet3/3 [System]
-------------------------------------------
Trust: Trusted
-----------------------------------
Que# Group Qlimit% IVL      CoSMap
-----------------------------------
   0     1      90   0         0-4
   1     0      10   5         5-7

Yet to test fully, but I think this will do the job. Only issue is that I have to use CoS as opposed to DSCP for the queues, but the IPT traffic should already have the correct CoS value set in the inbound traffic.

Final config:

qos copy policy type queuing default-4q-8e-out-policy prefix 20G-EGRESS-

policy-map type queuing 20G-EGRESS-4q-8e-out

int po3

service-policy type queuing output 20G-EGRESS-4q-8e-out