Pranav P Mehta

US Patent:

7710899, May 4, 2010

Filed:

Aug 16, 2005

Appl. No.:

11/205977

Inventors:

David D. Ward - Somerset WI, US
John Galen Scudder - Ann Arbor MI, US
Pranav Mehta - San Jose CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/28

US Classification:

370254

Abstract:

A technique is provided for graceful restart of a Border Gateway Protocol (BGP) router that uses a local store on the restarting router that stores prefixes on all routes or the “group best path” information on all BGP peers having a common Autonomous System (AS) number. This local store is used to run best path computations on the restarting router, rather than first awaiting receipt of route information from peers to speed the restart process. Updates are then transmitted to peers using the best path data and an end-of-Routing Information Base (RIB) message it transmitted by the restarting router to indicate that all information has now been sent by the restarting router. Thereafter the restarting router processes incoming updates from peers as received (or these peers routes are timed-out), remaining stale paths are deleted and any changed best paths, based upon the newly received updates, are then transmitted to peers.

US Patent:

8065438, Nov 22, 2011

Filed:

Nov 14, 2006

Appl. No.:

11/559581

Inventors:

Pranav Mehta - San Jose CA, US
Pradosh Mohapatra - Fremont CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06H 15/16
H04L 12/28

US Classification:

709249, 37039531, 3703953

Abstract:

In one or more embodiments, an architecture is provided that may intercept a route update message and compare AS numbers of an AS path with a list of AS numbers known or inferred to be problematic. In one or more embodiments, the problematic AS numbers can be substituted with a local AS number such that loop detection checks enforced automatically on many networks do not discard the message and/or prevent connectivity between two disparate networks.

US Patent:

20130176845, Jul 11, 2013

Filed:

Jan 10, 2012

Appl. No.:

13/347653

Inventors:

Stefan Olofsson - Dubai, AE
Pradosh Mohapatra - Fremont CA, US
Pranav Piyushbhai Mehta - San Jose CA, US
Arjun Sreekantaiah - Santa Clara CA, US

Assignee:

Cisco Technology, Inc., a corporation of California - San Jose CA

International Classification:

H04L 12/26

US Classification:

370225

Abstract:

In one embodiment, a packet switching device determines backup forwarding paths based on route distinguisher correlation values. A route distinguisher correlation value is some value associated with multiple routes, which allows a packet switching device to consider routes associated with a same route distinguisher correlation value, but having different route distinguishers and a same prefix to be considered as going to a same destination. Examples of route distinguisher correlation value used in one embodiment include, but are not limited to: scalar values, a route distinguisher of a different route, a virtual private network associated with a different route; a route target associated with the a different route; or a Border Gateway Protocol (BGP) Next-hop address associated with a different route.