bfifo - Byte limited First In, First Out queue
tc qdisc ... add bfifo [ limit bytes ]
Like all non-default qdiscs, they maintain statistics. This might be a reason to prefer pfifo or bfifo over the default.
If the list is too long, no further packets are allowed on. This is called 'tail drop'.
- Maximum queue size. Specified in bytes for bfifo, in packets for pfifo.
For pfifo, defaults to the interface txqueuelen, as specified with
ifconfig(8) or ip(8). The range for this parameter is [0,
For bfifo, it defaults to the txqueuelen multiplied by the interface MTU. The range for this parameter is [0, UINT32_MAX] bytes.
Note: The link layer header was considered when counting packets length.
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.
This manpage maintained by bert hubert <firstname.lastname@example.org>
|10 January 2002||iproute2|