lldptool(8) Linux lldptool(8)NAME
PFC - Show / manipulate PFC TLV configuration
SYNOPSIS
lldptool -t -i ethx -V PFC { willing | enabled | delay | numtcs }
lldptool -T -i ethx -V PFC <-c CONFIG_ARG ...>
CONFIG_ARG :=
enableTx = {yes|no} |
willing = {0|1} |
enabled = [0..7],[0..7],... |
delay = integer
DESCRIPTION
The PFC TLV is used to display and set current PFC TLV attributes.
ARGUMENTS
enableTx
Enable the PFC TLV to be transmitted in the LLDP PDU for the
specified interface.
willing
Display or set willing attribute. If set and peer TLV is
received the peer PFC attributes will be used. If cleared
locally configured attributes are used.
enabled
Display or set priorities with PFC enabled. The set attribute
takes a comma separated list of priorities to enable.
delay Display or set delay attribute used to configure PFC thresholds
in hardware buffers. If PFC is enabled and frames continue to be
dropped due to full hardware buffers increasing this value may
help.
Theory of Operations
The PFC TLV uses Symmetric attribute passing meaning the attributes
used will depend on the willing bit. If the willing bit is enabled and
a peer TLV is received the peers attributes will be used. If the will‐
ing bit is set to 0 the local attributes should be used. When both the
peer and local configuration are willing a tie breaking scheme is used.
For more detailed coverage see the specification.
EXAMPLE & USAGE
Enable PFC for priorities 1, 2, and 4 on eth2
lldptool -T -i eth2 -V PFC enabled=1,2,4
Display priorities enabled for PFC on eth2
lldptool -t -i eth2 -V PFC -c enabled
Display last transmitted PFC TLV on eth2
lldptool -t -i eth2 -V PFC
SOURCE
o IEEE 802.1Qaz (http://www.ieee802.org/1/pages/dcbridges.html)
NOTESSEE ALSOlldptool(8), lldpad(8)AUTHOR
John Fastabend
open-lldp February 2010 lldptool(8)
