Fast path forwarding of link state advertisements using...

Details Fast path forwarding of link state advertisements using... Fast path forwarding of link state advertisements using...

2005-03-22

2005-03-22

Dharia, Rupal (Department: 2141)

Electrical computers and digital processing systems: multicomput

Computer-to-computer data routing

Alternate path routing

C709S238000, C709S240000, C370S350000

Reexamination Certificate

active

06871235

ABSTRACT:
A link state advertisement protocol message received from an originating device over an inbound interface is forwarded over the fast path according to a reverse path forwarding determination. Specifically, a reverse path forwarding check is performed in order to determine the reverse path forwarding interface for the originating device. A forwarding state that indicates the reverse path forwarding interface may be installed, in which case the forwarding state may be used to determine the reverse path forwarding interface. If the inbound interface is determined to be the reverse path forwarding interface for the originating device, then the link state advertisement protocol message is forwarded over the fast path. Otherwise, the link state advertisement protocol message is not forwarded over the fast path. The link state advertisement protocol message continues to be processed and forwarded by the control plane as usual for robustness.

REFERENCES:
patent: 4864559 (1989-09-01), Perlman
patent: 5331637 (1994-07-01), Francis et al.
patent: 5917820 (1999-06-01), Rehkter
patent: 6252856 (2001-06-01), Zhang
patent: 6331983 (2001-12-01), Haggerty et al.
http://www.faqs.org/rfcs/rfc2362.html, D. Estrin et al, RFC 2362, Jun. 1998.

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