Wired Intelligent Edge

Hi,

I setup QoS on our network switches which are all Procurve/Aruba.  If I look at the command, show interface queues [port number,]  I can see if there are any drops due to congestion.

When I do that command on the ETH interface that connects to our Aruba wireless controller, I see the most drops in Q1:

switch# sh interface queues a17

 Status and Counters - Port Counters for port A17

  Name  : Aruba-Primary
  Link Status      : Up
  Port Enabled     : Yes
  Port Totals (Since boot or last clear) :
   Rx Packets      : 1,121,417,377      Tx Packets      : 1,157,635,163
   Rx Bytes        : 3,134,138,169      Tx Bytes        : 4,060,872,517
   Rx Drop Packets : 0                  Tx Drop Packets : 615,860
   Rx Drop Bytes   : 0                  Tx Drop Bytes   : 866,746,192

  Egress Queue Totals (Since boot or last clear) :
     Tx Packets         Dropped Packets    Tx Bytes           Dropped Bytes
 Q1  347,175,323        528,989            378,345,756,886    742,624,654
 Q2  910,876            0                  379,784,933        0
 Q3  720,055,318        86,589             531,821,082,168    123,714,184
 Q4  2,890,254          26                 3,492,622,776      37,544
 Q5  37,539,447         31                 34,274,523,625     44,270
 Q6  33,740,343         225                27,541,578,923     325,540
 Q7  12,726,796         0                  7,069,669,915      0
 Q8  2,596,839          0                  388,447,992        0

Looking at the switches, it appears that Q3 is priority 0 and guaranteed 30 percent of the bandwidth.  I believe this to be normal traffic (best effort) probably Internet browsing, etc.

Can anyone tell me what type of traffic is in Q1?  I'm wondering what is getting dropped, and what type of traffic that is?  according to what I'm seeing in the switch, this is categorized as priority 1.  I'm just using the Procurve defaults:

It's hard to say which traffic is placed in queue 1. By default AOS-S (Procurve) switches will trust the 802.1p tag in the packets. If the 802.1p tag is set to priority 1 the packets will be placed in queue 1. Queue 1 is also known as the background queue.

To find out which traffic is marked as background you can make a packet capture and filter on 802.1p tag 1. The switches can also log traffic using ACL's. With a MAC ACL you can match all traffic with CoS / 802.1p value 1. For example:

mac-access-list extended "300"     10 permit any any any cos 1 log     20 permit any any any   exit

Then apply the MAC access list on 1 or more VLANs.

Hi,

I setup QoS on our network switches which are all Procurve/Aruba.  If I look at the command, show interface queues [port number,]  I can see if there are any drops due to congestion.

When I do that command on the ETH interface that connects to our Aruba wireless controller, I see the most drops in Q1:

switch# sh interface queues a17

 Status and Counters - Port Counters for port A17

  Name  : Aruba-Primary
  Link Status      : Up
  Port Enabled     : Yes
  Port Totals (Since boot or last clear) :
   Rx Packets      : 1,121,417,377      Tx Packets      : 1,157,635,163
   Rx Bytes        : 3,134,138,169      Tx Bytes        : 4,060,872,517
   Rx Drop Packets : 0                  Tx Drop Packets : 615,860
   Rx Drop Bytes   : 0                  Tx Drop Bytes   : 866,746,192

  Egress Queue Totals (Since boot or last clear) :
     Tx Packets         Dropped Packets    Tx Bytes           Dropped Bytes
 Q1  347,175,323        528,989            378,345,756,886    742,624,654
 Q2  910,876            0                  379,784,933        0
 Q3  720,055,318        86,589             531,821,082,168    123,714,184
 Q4  2,890,254          26                 3,492,622,776      37,544
 Q5  37,539,447         31                 34,274,523,625     44,270
 Q6  33,740,343         225                27,541,578,923     325,540
 Q7  12,726,796         0                  7,069,669,915      0
 Q8  2,596,839          0                  388,447,992        0

Looking at the switches, it appears that Q3 is priority 0 and guaranteed 30 percent of the bandwidth.  I believe this to be normal traffic (best effort) probably Internet browsing, etc.

Can anyone tell me what type of traffic is in Q1?  I'm wondering what is getting dropped, and what type of traffic that is?  according to what I'm seeing in the switch, this is categorized as priority 1.  I'm just using the Procurve defaults: