RFC 1582 (rfc1582) - Page 2 of 29
Extensions to RIP to Support Demand Circuits
Alternative Format: Original Text Document
RFC 1582 Demand RIP February 1994
The WAN circuit manager advises the routing applications on the
reachability and non-reachability of destinations on the WAN.
Acknowledgements
I would like to thank colleagues at Spider, in particular Richard
Edmonstone, Tom Daniel and Alam Turland, Yakov Rekhter (IBM), Martha
Steenstrup (BBN), and members of the RIP-2 working group of the IETF
for stimulating discussions and comments which helped to clarify this
memo.
Conventions
The following language conventions are used in the items of
specification in this document:
o MUST -- the item is an absolute requirement of the specification.
MUST is only used where it is actually required for interoperation,
not to try to impose a particular method on implementors
where not required for interoperability.
o SHOULD -- the item should be followed for all but exceptional cir-
cumstances.
o MAY or optional -- the item is truly optional and may be followed
or ignored according to the needs of the implementor.
The words "should" and "may" are also used, in lower case, in their
more ordinary senses.
Table of Contents
1. Introduction ........................................... 3
2. Running a routing Protocol on the WAN .................. 4
2.1. Overview ......................................... 4
2.2. Presumption of Reachability ...................... 6
2.3. WAN Router list .................................. 7
2.4. Triggered Updates and Unreliable Delivery ........ 8
2.5. Guaranteeing delivery of Routing Updates ......... 8
2.6. The Routing Database ............................. 9
2.7. New Packet Types ................................. 10
2.8. Fragmentation .................................... 12
2.9. Preventing Queue Overload ........................ 13
3. IP Routing Information Protocol Version 1 .............. 13
4. IP Routing Information Protocol Version 2 .............. 16
5. Netware Routing Information Protocol ................... 17
6. Netware Service Advertising Protocol ................... 20
7. Timers ................................................. 24
Meyer