14.1. bfifo/pfifo
These classless queues are even simpler than pfifo_fast in that they lack
the internal bands - all traffic is really equal. They have one important
benefit though, they have some statistics. So even if you don't need shaping
or prioritizing, you can use this qdisc to determine the backlog on your
interface.
pfifo has a length measured in packets, bfifo in bytes.
14.1.1. Parameters & usage
- limit
Specifies the length of the queue. Measured in bytes for bfifo, in packets
for pfifo. Defaults to the interface txqueuelen (see pfifo_fast chapter)
packets long or txqueuelen*mtu bytes for bfifo.
Take our 
