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:
Oct. 27, 2009
Filed:
Jan. 17, 2003
Hiroaki Miyata, Yokohama, JP;
Atsushi Tachikawa, Yokohama, JP;
Hiroaki Miyata, Yokohama, JP;
Atsushi Tachikawa, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A packet transfer apparatus having a plurality of protocol processing unitsand a switchfor switching IP packets among the protocol processing units, wherein a protocol processing unit connected to an IPv4 network includes: input-side address translator CNv6 (I) for translating the address of an input packet to an IPv6 address; output-side address translator CNv4 (O) for translating, when an IPv6 packet is received from the switch, the address to an IPv4 address and transferring the resultant packet to the IPv4 network; and an operation mode controller for omitting address translation by the input-side address translator.