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Help Disiphering QOS on our legacy Distribution switches

Unanswered Question
Feb 13th, 2014
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Please someone help me deschiper the QOS on our legacy distribution switches, these are the switch connecting to our closets, each port is a fiber trunk back to the distribution. I'm assuming this is the egress queue, I have some understanding of what is happening but not all. The things I understnad I marked, I need help with the rest....                  



interface FastEthernet 3/5

  description HICKPOPPROBE3

  switchport

  switchport access vlan 138

  switchport trunk encapsulation 138

  switchport trunk allowed vlan non

  switchport mode trunk

  no ip address

  shutdown

  speed 100

  duplex full

  wrr-queue queue-limit 2 100  -- ???

  wrr-queue threshold 1 1 1  -- ???

  wrr-queue threshold 2 1 1  --- ??

  wrr-queue cos-map 2 1 4 5 6  - here I believe that the second queue has the DSCP values assigned to it, but I'm not positive

  wrr-queue cos-map 2 2 7  - here as well ??

  mls qost trust cos


I basically need the full qos picture explained asside from the trunk and speed and duplex configuration. I'm having troubble understanding the thresholds and queue limits.  Also on the following configuration as well:


interface GigabitEthernet 6/7

  descripion WLAN controller

  switchport

  switchport access vlan 128

  switchport trunk encapsulation dot1q

  switchport trunk native vlan 128

  switchport trunk allowed vlan 128, 324, 332

  switchport mode trunk

  no ip address

  wrr-queue random-detect  min-threshhold 1 1 1  --- ???                   is this minimum random drop and minimum complete drop for queue 1 ????

  wrr-queue random-detect  min-threshhold 2 1 1  ---- ????              is this minimum random drop and minimum complete drop for queue 2 ????

  wrr-queue randont-detect  max-threshold  1 80 100   --- here i understand on first queue it will start random drop at 80% and drop all at 100%

  wrr-queue randont-detect max-threshold 2 80 100   --- same for queue 2

  mls qos trust cos

  flowcontrol send on

  channel-group 8 mode on

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Joseph W. Doherty Thu, 02/13/2014 - 08:53
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What model switches?


If 6500, what model line cards.

Joseph W. Doherty Thu, 02/13/2014 - 10:18
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6500 QoS varies per line card architecture.  Without knowing the line cards, difficult to decipher QoS statements.

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