AS5800-EC Series CLI Reference Guide R02

Chapter 22 | Data Center Bridging Commands
Enhanced Transmission Selection Commands
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show pfc statistics Use this command to how PFC statistics for the number of PFC frames received and
transmitted for each priority.
Syntax
show pfc statistics [interface interface]
interface
ethernet unit/port
unit - Unit identifier. (Range: 1)
port - Port number. (Range: 1-54)
port-channel channel-id (Range: 1-27)
Command Mode
Privileged Exec
Example
This example shows the number of received and transmitted PFC frames for each
priority class used for Port 5.
Console#show pfc statistics interface ethernet 1/5
Interface Pri Rx PFC Frames Tx PFC Frames
--------- --- -------------------- --------------------
Eth 1/ 5 0 0 0
Eth 1/ 5 1 0 0
Eth 1/ 5 2 0 0
Eth 1/ 5 3 0 0
Eth 1/ 5 4 0 0
Eth 1/ 5 5 0 0
Eth 1/ 5 6 0 0
Eth 1/ 5 7 0 0
Console#
Enhanced Transmission Selection Commands
Enhanced Transmission Selection (ETS) provides a means to allocate link
bandwidth to different priority groups as a percentage of total bandwidth. These
settings are then advertised to other devices in a data center network through
DCBX ETS TLVs. Peer devices accept ETS traffic class group and bandwidth
information TLVs from auto-upstream devices and propagate it to auto-
downstream devices.
The priority of a packet arriving at an interface is grouped into a TCG at the first
level of scheduling, ensuring that the minimum bandwidth is provided. The packet
is then steered into the appropriate outbound CoS queue through a mapping table
by a second level scheduler. Using ETS, the required bandwidth is provided to each
TCG. Within each TCG, multiple traffic classes share the bandwidth of the group.