Hi All,
I am managing a number of 3850-24XS Catalysts, running Denali 16.3.5b.
These have 24 10Gig interfaces and they're seeing a large number of
output discards on these.
The output of the following command shows the hardmax/softmax queues on
the interface:
#show platform hardware fed switch active qos queue config interface te1/0/1
DATA Port:7 GPN:873 AFD:Disabled QoSMap:0 HW Queues: 56 - 63
DrainFast:Disabled PortSoftStart:2 - 1080
----------------------------------------------------------
DTS Hardmax Softmax PortSMin GlblSMin PortStEnd
--- -------- -------- -------- --------- ---------
0 1 5 120 2 480 6 320 0 0 5 1440
1 1 4 0 6 720 3 480 2 180 5 1440
2 1 4 0 5 0 5 0 0 0 5 1440
3 1 4 0 5 0 5 0 0 0 5 1440
4 1 4 0 5 0 5 0 0 0 5 1440
5 1 4 0 5 0 5 0 0 0 5 1440
6 1 4 0 5 0 5 0 0 0 5 1440
7 1 4 0 5 0 5 0 0 0 5 1440
According to the following link about Troubleshooting Output drops on
this platform these are the buffer values for a 1Gig interface?
https://www.cisco.com/c/en/us/support/docs/switches/catalyst-3850-series-switches/200594-Catalyst-3850-Troubleshooting-Output-dr.html
Does anyone know whether there is a bug-id for this, and whether it is
fixed in any Denali 16.3.x ?
In the document it specifies that:
The show command that can be used to see this allocation is ‘show
platform qos queue config <interface>’.
For a 1Gig interface,
3850#show platform qos queue config gigabitEthernet 1/0/1
DATA Port:20 GPN:66 AFD:Disabled QoSMap:0 HW Queues: 160 - 167
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
<<output omitted>>
For a 10Gig interface,
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
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