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| -rw-r--r-- | doc/ospfd.texi | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/doc/ospfd.texi b/doc/ospfd.texi index 5952c051..6163ea98 100644 --- a/doc/ospfd.texi +++ b/doc/ospfd.texi @@ -52,10 +52,26 @@ number. @deffn {OSPF Command} {ospf abr-type @var{type}} {} @deffnx {OSPF Command} {no ospf abr-type @var{type}} {} @var{type} can be cisco|ibm|shortcut|standard +More information regarding the behaviour controlled by this command can +be found in draft-ietf-ospf-abr-alt-05.txt and +draft-ietf-ospf-shortcut-abr-02.txt +Quote: "Though the definition of the Area Border Router (ABR) +in the OSPF specification does not require a router with multiple +attached areas to have a backbone connection, it is actually +necessary to provide successful routing to the inter-area and +external destinations. If this requirement is not met, all traffic +destined for the areas not connected to such an ABR or out of the +OSPF domain, is dropped. This document describes alternative ABR +behaviors implemented in Cisco and IBM routers." @end deffn @deffn {OSPF Command} {ospf rfc1583compatibility} {} @deffnx {OSPF Command} {no ospf rfc1583compatibility} {} +This rfc2328, the sucessor to rfc1583, suggests according to section G.2 +(changes) in section 16.4 a change to the path preference algorithm that +prevents possible routing loops that were possible in the old version of +OSPFv2. More specificly it demands that inter-area paths and intra-area path +are now of equal preference but still both preferred to external paths. @end deffn @deffn {OSPF Command} {passive interface @var{interface}} {} |