Hello!
Please, can someone explain me why I have a 1Gig buffer allocation conf on a 10Gig int? What can we tune?
Initially, I found errors on interfaces on a 3850 (ver 03.07.03E)
Port Align-Err FCS-Err Xmit-Err Rcv-Err UnderSize OutDiscards
Te1/0/1 0 0 0 0 0 0
Te1/0/2 0 0 40349970 0 0 40349970
Te1/0/3 0 0 0 0 0 0
Te1/0/4 0 0 0 0 0 0
Te1/0/5 0 0 0 0 0 0
Te1/0/6 0 0 144190 0 0 144190
Te1/0/7 0 0 3479472 0 0 3479472
I found this document from Cisco : Catalyst 3850: Troubleshooting Output drops
So I checked my conf
Switch#show platform qos queue config Te 1/0/7
DATA Port:6 GPN:7 AFD:Disabled QoSMap:0 HW Queues: 48 - 55
DrainFast:Disabled PortSoftStart:1 - 1080
----------------------------------------------------------
DTS Hardmax Softmax PortSMin GlblSMin PortStEnd
--- -------- -------- -------- --------- ---------
0 1 5 120 6 480 6 320 0 0 3 1440
1 1 4 0 7 720 3 480 2 180 3 1440
2 1 4 0 5 0 5 0 0 0 3 1440
3 1 4 0 5 0 5 0 0 0 3 1440
4 1 4 0 5 0 5 0 0 0 3 1440
5 1 4 0 5 0 5 0 0 0 3 1440
6 1 4 0 5 0 5 0 0 0 3 1440
7 1 4 0 5 0 5 0 0 0 3 1440
Priority Shaped/shared weight shaping_step
-------- ------------ ------ ------------
0 0 Shared 50 0
1 0 Shared 75 0
2 0 Shared 10000 26
3 0 Shared 10000 0
4 0 Shared 10000 120
5 0 Shared 10000 0
6 0 Shared 10000 48
7 0 Shared 10000 0
Weight0 Max_Th0 Min_Th0 Weigth1 Max_Th1 Min_Th1 Weight2 Max_Th2 Min_Th2
------- ------- ------ ------ ------ ------ ------ ------ ------
0 0 478 0 0 534 0 0 600 0
1 0 573 0 0 641 0 0 720 0
2 0 0 0 0 0 0 0 0 0
3 0 0 0 0 0 0 0 0 0
4 0 0 0 0 0 0 0 0 0
5 0 0 0 0 0 0 0 0 0
6 0 0 0 0 0 0 0 0 0
7 0 0 0 0 0 0 0 0 0
We do not have policy applied
Switch#show policy-map int TenGigabitEthernet 1/0/7
Switch#
Default conf for a 10Gig Interface from the Cisco doc
3850#show platform qos queue config tenGigabitEthernet 1/0/37
DATA Port:1 GPN:37 AFD:Disabled QoSMap:0 HW Queues: 8 - 15
DrainFast:Disabled PortSoftStart:2 - 6480
----------------------------------------------------------
DTS Hardmax Softmax PortSMin GlblSMin PortStEnd
--- -------- -------- -------- --------- ---------
0 1 6 720 8 2880 7 1280 0 0 4 8640
1 1 4 0 9 4320 8 1920 3 1080 4 8640
2 1 4 0 5 0 5 0 0 0 4 8640
3 1 4 0 5 0 5 0 0 0 4 8640
4 1 4 0 5 0 5 0 0 0 4 8640
