A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Link State Routing WG of the IETF.
Title : Host Router Support for OSPFv2
Authors : Keyur Patel
Padma Pillay-Esnault
Manish Bhardwaj
Serpil Bayraktar
Filename : draft-ietf-ospf-ospfv2-hbit-08.txt
Pages : 10
Date : 2019-07-08
Abstract:
The OSPFv2 specifies an SPF algorithm that identifies transit
vertices based on their adjacencies. Therefore, OSPFv2 does not have
a mechanism to prevent traffic transiting a participating node if it
is a transit vertex in the only existing or shortest path to the
destination. The use of metrics to make the node undesirable can
only help to repel traffic if an alternative better route exists.
This document defines the Host-bit functionality to prevent other
OSPFv2 routers from using the router for transit traffic in OSPFv2
routing domains. This document updates the Open Shortest Path First
v2 specification (OSPFv2 rfc2328) by assigning a new bit (Host-bit)
in the OSPF Router-LSA bit registry. In addition, if the Host-bit is
set, the calculation of the shortest-path tree for an area, as
described in OSPFv2, is modified by including a new check to verify
that transit vertices have the Host-bit clear. In addition, this
document updates OSPF Stub Router Advertisement (rfc6987) to
advertise for type-2 External and NSSA LSAs with a high cost in order
to repel traffic effectively.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-ospf-ospfv2-hbit/
There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-ospf-ospfv2-hbit-08
https://datatracker.ietf.org/doc/html/draft-ietf-ospf-ospfv2-hbit-08
A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-ospf-ospfv2-hbit-08
Please note that it may take a couple of minutes from the time of submission
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