Users Guide

dot1p Value in
the Incoming
Frame
Egress Queue Assignment
2 0
3 1
4 2
5 3
6 3
7 3
dot1p Value in
the Incoming
Frame
Egress Queue Assignment
0 2
1 0
2 1
3 3
4 4
5 5
6 6
7 7
Conguring the Dynamic Buer Method
Priority-based ow control using dynamic buer spaces is supported on the S4810 platform.
To congure the dynamic buer capability, perform the following steps:
1. Enable the DCB application. By default, DCB is enabled and link-level ow control is disabled on all interfaces.
CONFIGURATION mode
dcb enable
2. Congure the shared PFC buer size and the total buer size. A maximum of 4 lossless queues are supported.
CONFIGURATION mode
dcb pfc-shared-buffer-size 4000
dcb pfc-total-buffer-size 5000
NOTE: For dcb pfc-shared-buffer-size, the range is from <0-11210> in KB (default LC=2496/SFM=3328)
For dcb pfc-total-buffer-size, the range is from <0-11210> in KB(default LC=7488/SFM=7596)
3. Congure the number of PFC queues.
CONFIGURATION mode
dcb enable pfc-queues pfc-queues
The number of ports supported based on lossless queues congured will depend on the buer. The default number of PFC
queues in the system is two for S4810 and Z9500, and one for S6000 platforms.
Data Center Bridging (DCB)
281