Router line card protection using one-for-N redundancy

Details Router line card protection using one-for-N redundancy Router line card protection using one-for-N redundancy

2005-04-12

2005-04-12

Sam, Phirin (Department: 2661)

Multiplex communications

Fault recovery

Bypass an inoperative channel

C370S216000, C370S227000, C370S228000, C370S392000, C370S471000, C370S473000, C398S024000, C398S083000

Reexamination Certificate

active

06879559

ABSTRACT:
Router line cards are partitioned, separating packet forwarding from external or internal interfaces and enabling multiple line cards to access any set of external or internal data paths. Any failed working line card can be switchably replaced by another line card. In particular, a serial bus structure on the interface side interconnects any interface port within a protection group with a protect line card for that group. Incremental capacity allows the protect line card to perform packet forward functions. Logical mapping of line card addressing and identification provides locally managed protection switching of a line card that is transparent to other router line cards and to all peer routers. One-for-N protection ratios, where N is some integer greater than two, can be achieved economically, yet provide sufficient capacity with acceptable protection switch time under 100 milliseconds. Alternatively, protect line cards can routinely carry low priority traffic that is interruptible, allowing the protect line card to handle higher priority traffic previously carried by a failed working line card. This approach renders unnecessary engineering a network for less than full capacity to allow rerouting in the event of individual line card failure. Consequently, all data paths can be fully utilized. If a particular interface module on one data bus needs removal for maintenance, a duplicate data bus is available intact, allowing hot replacement of any working or protect interface module, even while a line card protection switch is in effect.

REFERENCES:
patent: 4160127 (1979-07-01), Slana et al.
patent: 4579079 (1986-04-01), Nundy
patent: 4658396 (1987-04-01), Barden
patent: 5014261 (1991-05-01), Shinbashi et al.
patent: 5583859 (1996-12-01), Feldmeier
patent: 5596569 (1997-01-01), Madonna et al.
patent: 5740157 (1998-04-01), Demiray et al.
patent: 5796717 (1998-08-01), Shinbashi et al.
patent: 5831970 (1998-11-01), Arao
patent: 5923643 (1999-07-01), Higgins et al.
patent: 5937169 (1999-08-01), Connery et al.
patent: 6151318 (2000-11-01), Woodward et al.
patent: 6298038 (2001-10-01), Martin et al.
patent: 6324162 (2001-11-01), Chaudhuri
patent: 6332198 (2001-12-01), Simons et al.
patent: 6377543 (2002-04-01), Grover et al.
patent: 6445717 (2002-09-01), Gibson et al.
patent: 6473397 (2002-10-01), Au
patent: 6587470 (2003-07-01), Elliot et al.
patent: 6597826 (2003-07-01), Ramaswami et al.
U.S. Appl. No. 09/703,057, Brewer et al., filed Oct. 31, 2000.
U.S. Appl. No. 09/703,056, Brewer et al., filed Oct. 31, 2000.
U.S. Appl. No. 09/703,038, Brewer et al., filed Oct. 31, 2000.
U.S. Appl. No. 09/702,958, Brewer et al., filed Oct. 31, 2000.
U.S. Appl. No. 09/703,027, Blackmon et al., filed Oct. 31, 2000.
U.S. Appl. No. 09/703,064, McDermott III et al., filed Oct. 31, 2000.
European Search Report issued for EP 01 30 9201.0, Mar. 25, 2004.

Affiliated with

Also associated with

Rating

Router line card protection using one-for-N redundancy does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Router line card protection using one-for-N redundancy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Router line card protection using one-for-N redundancy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3409433