Glossary
F
Centillion 1200N ATM Switch User Manual
B-29
NTP 297-8103-903
FECN
Forward Explicit Congestion Notification: This bit notifies the user that
congestion-avoidance procedures should be initiated were applicable for traffic in
the same direction as the received frame. This bit notifies the user that congestion-
avoidance procedures should be initiated were applicable for traffic in the same
direction as the received frame. It indicates that this frame, on this logical
connection, has encountered congested resources.
FERF
Far End Receive Failure
FG
Functional Group: A collection of functions related in such a way that they will be
provided by a single logical component. Examples include the Route Server
Functional Group (RSFG), the IASG (Internetwork Address Sub-Group),
Coordination Functional Group (ICFG), the Edge Device Functional Group
(EDFG) and the ATM attached host Behavior Functional Group (AHFG).
FIFO
First-in First-out: All telephone networks are a trade-off. It’s simply to expensive
to build a phone network which will be ready to give everyone dial tone and a
circuit if everyone picked up the phone simultaneously and tried to make a call.
There are basically two ways of handling calls which cannot be sent on their way-
i.e. for which there’s no present available capacity. First, you can "block" the call.
This means giving the caller a busy or a "nothing" (also called "high and dry").
Second, you can put the call into a queue. Now you have people waiting in queue,
how do you handle them? The most equitable-the way most queues work-is to
handle the calls on the basis of First In, First Out.(First call to come in is handled
first.) There are other ways of handling calls in a queue-including First In, Last Out,
by priority (e.g. which line you came in on and how much it cost, or how high you
are in the corporation, etc.)
Flush Protocol
The flush protocol is provided to ensure the correct order of delivery of unicast data
frames.
Foreign Address
An address that does not match any of a given node's summary addresses.
Forwarding Description
The resolved mapping of an MPOA Target to a set of parameters used to set up an
ATM connection on which to forward packets.
