Provided by: lldpad_0.9.43+git20111215.c0498b-1_amd64 bug

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 willing 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)

NOTES

SEE ALSO

       lldptool(8), lldpad(8)

AUTHOR

       John Fastabend