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    The following form allows you to view linux man pages.

    Command:

    tc-pfifo

    
           bfifo - Byte limited First In, First Out queue
    
    
    

    SYNOPSIS

           tc qdisc ... add pfifo [ limit packets ]
    
           tc qdisc ... add bfifo [ limit bytes ]
    
    
    

    DESCRIPTION

           The  pfifo  and  bfifo qdiscs are unadorned First In, First Out queues.
           They are the simplest queues possible and therefore have  no  overhead.
           pfifo  constrains the queue size as measured in packets.  bfifo does so
           as measured in bytes.
    
           Like all non-default qdiscs, they maintain statistics. This might be  a
           reason to prefer pfifo or bfifo over the default.
    
    
    

    ALGORITHM

           A  list  of  packets  is  maintained, when a packet is enqueued it gets
           inserted at the tail of a list. When a packet needs to be sent  out  to
           the network, it is taken from the head of the list.
    
           If  the  list  is  too long, no further packets are allowed on. This is
           called 'tail drop'.
    
    
    

    PARAMETERS

           limit  Maximum queue size. Specified in bytes for bfifo, in packets for
                  pfifo. For pfifo, defaults to the interface txqueuelen, as spec-
                  ified with ifconfig(8) or ip(8).
    
                  For bfifo, it defaults  to  the  txqueuelen  multiplied  by  the
                  interface MTU.
    
    
    

    OUTPUT

           The  output  of tc -s qdisc ls contains the limit, either in packets or
           in bytes, and the number of bytes and packets actually sent. An  unsent
           and  dropped  packet  only appears between braces and is not counted as
           'Sent'.
    
           In this example, the queue length is 100 packets, 45894 bytes were sent
           over 681 packets.  No packets were dropped, and as the pfifo queue does
           not slow down packets, there were also no overlimits:
    
           # tc -s qdisc ls dev eth0
           qdisc pfifo 8001: dev eth0 limit 100p
            Sent 45894 bytes 681 pkts (dropped 0, overlimits 0)
    
           If a backlog occurs, this is displayed as well.
    
    
    

    iproute2 10 January 2002 PBFIFO(8)

    
    
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