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:
Nov. 06, 2012
Filed:
Dec. 28, 2006
Masahiko Mizutani, Kokubunji, JP;
Atsushi Iwamura, Yokohama, JP;
Yoshihiro Ashi, Yokohama, JP;
Kenichi Sakamoto, Kokubunji, JP;
Masahiko Mizutani, Kokubunji, JP;
Atsushi Iwamura, Yokohama, JP;
Yoshihiro Ashi, Yokohama, JP;
Kenichi Sakamoto, Kokubunji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
To prevent, in using a multicast DA in an OAM frame, an increase in the network bandwidth usage and in the load of node processing and a degradation of the network reliability caused by a frame being transmitted to all routes in a broadcast domain. A MAC address and other basic frame information and the MEGID are associated with each other, and the MEGID information is added to the OAM frame, and these information are transmitted from an edge node serving as an end point of an ME. In a relay node of the ME, a route control table used for OAM frame control is provided, and a filter is generated by snooping of the OAM frame. Furthermore, when the relay node does not support the OAM function, the MEGID is denoted by a VLAN tag and the route control is made using the snooping function of each VLAN tag.