Top Document: comp.dcom.sys.cisco Frequently Asked Questions (FAQ)
You should tell your cisco to use ``encapsulation frame-relay ietf''
(instead of ``encapsulation frame-relay'') on your serial interface
that's running frame relay if your frame relay network contains a
diverse set of manufacturers' routers. The keyword ``ietf'' specifies
that your cisco will use RFC1294-compliant encapsulation, rather than
the default, RFC1490-compliant encapsulation (other products, notably
Novell MPR 2.11, use a practice sanctioned by 1294 but deemed verbotten
by 1490, namely padding of the nlpid). If only a few routers in your
frame relay cloud require this, then you can use the default
encapsulation on everything and specify the exceptions with the
frame-relay map command:
frame-relay map ip 10.1.2.3 56 broadcast ietf
^^^^
(ietf stands for Internet Engineering Task Force, the body which
evaluates Standards-track RFCs; this keyword is a misnomer as both
RFC1294 and RFC1490 are ietf-approved, however 1490 is most recent and
is a Draft Standard (DS), whereas 1294 is a Proposed Standard (one step
beneath a DS), and is effectively obsolete).
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