The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 25, 2003
Filed:
Jun. 28, 1999
Applicant:
Inventors:
Assignee:
Nortel Networks Limited, St. Laurent, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 1/246 ; H04L 1/256 ;
U.S. Cl.
CPC ...
H04L 1/246 ; H04L 1/256 ;
Abstract
A system, device, and method for transitioning from DVMRP to BGMP for interdomain multicast routing over the Internet multicast backbone (Mbone) switches the Mbone DVMRP distribution tree, piece by piece, into BGMP distribution trees. Each piece is a contiguous BGMP regional tree. The routers in the regional BGMP tree run an extended BGMP protocol. The root of the regional BGMP tree also runs DVMRP, and joins the Mbone DVMRP distribution tree in order to receive multicast packets and forward the multicast packets over the regional BGMP tree. The extended BGMP protocol ensures that no fowarding loops are created between the Mbone DVMRP distribution tree and the regional BGMP tree.