EP 1595366 A1 20051116 - METHOD FOR ADDRESS TABLE LOOKUP
Title (en)
METHOD FOR ADDRESS TABLE LOOKUP
Title (de)
VERFAHREN ZUM ADRESSENTABELLENNACHSCHLAGEN
Title (fr)
PROCEDE DE CONSULTATION D'UNE TABLE D'ADRESSES
Publication
Application
Priority
- GB 2004000657 W 20040218
- GB 0304044 A 20030222
Abstract (en)
[origin: GB2398700A] When a data packet is received 14,15 at a router, the address portion of the packet is sampled 16,17,18 and sent to a programmable logic device 29 which looks it up in the look-up table of memory device 30 and determines an onward transmission path. Determination of the transmission path is performed whilst the remainder of the packet loads into memory 22. The address may be an IP address and the look-up means may compare the address in parts, with each respective part of the local address, in such a way that once a difference is noted, the difference value is used to generate a number, different values of which relate to different routing information depending upon which part of the target address differs from the local address. Two flags may be used in memory 22 to indicate loading, loaded, unloaded and empty states and more than one memory may be used for storing the packets (RAM A-D, fig.3).
IPC 1-7
IPC 8 full level
H04L 12/701 (2013.01); H04L 12/721 (2013.01); H04L 12/747 (2013.01)
CPC (source: EP)
H04L 45/00 (2013.01); H04L 45/40 (2013.01); H04L 45/742 (2013.01)
Citation (search report)
See references of WO 2004075490A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
GB 0304044 D0 20030326; GB 2398700 A 20040825; EP 1595366 A1 20051116; WO 2004075490 A1 20040902
DOCDB simple family (application)
GB 0304044 A 20030222; EP 04712100 A 20040218; GB 2004000657 W 20040218