Limited Flooding as a scalability improvement to OSPF

Document Type Expired Internet-Draft (individual in gen area)
Author Dan Dovolsky 
Last updated 2015-10-14 (latest revision 2002-11-04)
Stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
pdf htmlized (tools) htmlized bibtex
Stream WG state (None)
Document shepherd No shepherd assigned
IESG IESG state Expired (IESG: Dead)
Action Holders
Consensus Boilerplate Unknown
Telechat date
Responsible AD Alex Zinin
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This draft describes a limited flooding approach to address the problem of routing scalability in link state IGPs. The solution is based on decomposition of a routing area into 'zones' and the restriction of the exchange of routing information between zones. This approach introduces an extra level in the isolation of knowledge within a routing domain. The advantage of this solution is that it considerably decreases the amount of information flooded in link state advertisements and reduces the size of the link-state database (and traffic engineering entries) on network elements utilizing link state protocols. The technique presented in this document has been particularized to OSPF in order to make the discussion practical and concrete. However, the underlying concepts are very general and similar modifications can be easily applied to other IGPs, such as ISIS.


Dan Dovolsky (

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