1lldptool(8)                          Linux                         lldptool(8)
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NAME

6       PFC - Show / manipulate PFC TLV configuration
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SYNOPSIS

9       lldptool  -t -i ethx -V PFC [ -c [ enableTx | willing | enabled | delay
10       ] ]
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12       lldptool -T -i ethx -V PFC <CONFIG_ARG=value ...>
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14           CONFIG_ARG:=
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16            enableTx=<yes|no>
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18            willing=<yes|no|0|1>
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20            enabled=<none|[0..7],[0..7],...>
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22            delay=<integer value>
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DESCRIPTION

26       The PFC TLV is used to display and set current PFC TLV attributes.
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ARGUMENTS

30       enableTx
31              Enable the PFC TLV to be transmitted in the  LLDP  PDU  for  the
32              specified interface.
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34       willing
35              Display  or  set the willing attribute. If set to yes and a peer
36              TLV is received then the peer PFC attributes will  be  used.  If
37              set to no then locally configured attributes are used.
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39       enabled
40              Display  or  set  the  priorities  with  PFC  enabled.  The  set
41              attribute takes a comma separated list of priorities to  enable,
42              or the string none to disable all priorities.
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44       delay  Display or set the delay attribute used to configure PFC thresh‐
45              olds in hardware buffers. If PFC is enabled and frames  continue
46              to  be dropped due to full hardware buffers then increasing this
47              value may help.
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Theory of Operations

51       The PFC TLV uses the Symmetric attribute passing state machine  defined
52       in  IEEE  802.1Qaz.   This means the attributes used will depend on the
53       willing bit. If the willing bit is set to 1 and a peer TLV is  received
54       then  the peers attributes will be used. If the willing bit is set to 0
55       the local attributes will be used. When both the peer and local config‐
56       uration  are  willing  a tie breaking scheme is used. For more detailed
57       coverage see the specification.
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EXAMPLE & USAGE

61       Enable PFC for priorities 1, 2, and 4 on eth2
62              lldptool -T -i eth2 -V PFC enabled=1,2,4
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64       Disable PFC for all priorities on eth2
65              lldptool -T -i eth2 -V PFC enabled=none
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67       Display configuration of PFC enabled priorities for eth2
68              lldptool -t -i eth2 -V PFC -c enabled
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70       Display last transmitted PFC TLV on eth2
71              lldptool -t -i eth2 -V PFC
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SOURCE

74       o      IEEE 802.1Qaz (http://www.ieee802.org/1/pages/dcbridges.html)
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NOTES

SEE ALSO
79       lldptool(8), lldpad(8)
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AUTHOR
83       John Fastabend
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88open-lldp                         August 2012                      lldptool(8)



        

    


            
        

        

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