Sets symmetric flow control parameters.

symmetric-flow-control set port-type { buffers value [ unit unit-value ] | xoff num xon num }
no symmetric-flow-control set port-type { buffers value [ unit unit-value ] | xoff num xon num }

1G: Buffers: 272; XOFF Limit: 91; XON Limit: 75

10G: Buffers: 416; XOFF Limit: 91; XON Limit: 75

port-type
Specifies the port type. The port type can be one of the following:
1
Sets the buffer limits or XOFF and XON limits for 1G ports.
2
Sets the buffer limits or XOFF and XON limits for 10G ports.
3
Sets the buffer limits or XOFF and XON limits for 100G ports.
buffers value
Sets the total buffer limits. The value can range from 64 through 320 for 1G ports and from 64 through 1632 for 10G ports. The default value for 1G ports is 272 and for 10G ports is 416 .
unit unit-value
Specifies the buffer limit for a stack unit.
xoff num
Sets the XOFF limit. The minimum value is 60 percent, and the maximum value is 95 percent.
xon num
Sets the XON limit. The minimum value is 50 percent and the maximum value is 90 percent.

Global configuration mode

Use the show symmetric command to view the default or configured buffer limit or XON and XOFF thresholds.

The no form of the command deletes the configured symmetric flow control values.

The following example changes the thresholds for all 1G ports. 

device(config)# symmetric-flow-control set 1 xoff 91 xon 75

The following example changes the total buffer limit for all 10G ports. 

device(config)# symmetric-flow-control set 2 buffers 128

Total buffers modified, 1G: 320, 10G: 128