Packet forwarding apparatus with function of diverting traffic

Details Packet forwarding apparatus with function of diverting traffic Packet forwarding apparatus with function of diverting traffic

2006-03-02

2009-12-29

Pezzlo, John (Department: 2419)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S216000, C370S389000

Reexamination Certificate

active

07639705

ABSTRACT:
A packet forwarding apparatus is provided which can minimize traffic detoured to a backup path liable to be degraded in communication quality in the event of a link failure to thereby improve the communication quality. To this end, a technique is provided in which an output label decision unit and an output physical port ordinal number search unit which are included in a destination decision unit decide, from a header of an input packet, an output label of the packet, a first logical link to which the packet is to be outputted and a first physical link constituting the first logical link. When a failure takes place in the first physical link, the detour decision unit changes the output label to a backup label and the first physical link to a second physical link constituting a second logical link.

REFERENCES:
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patent: 2003/0043736 (2003-03-01), Gonda
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“Fast Reroute Extensions to RSVP-TE for LSP Tunnels” By P. Pan, et al, RFC 4090, Internet Drafts May 2005, pp. 1-30.
“Link Aggregation With 802.3ad” by J. Kuciel, Network World, Nov. 2000, pp. 1-2.

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