| US 7,499,450 B2 | ||
| Router IP port for an IP router | ||
| Andreas Foglar, München (Germany); and Sören Sonntag, München (Germany) | ||
| Assigned to Infineon Technologies AG, Munich (Germany) | ||
| Filed on Sep. 03, 2004, as Appl. No. 10/934,791. | ||
| Claims priority of provisional application 60/567224, filed on Apr. 30, 2004. | ||
| Prior Publication US 2005/0243818 A1, Nov. 03, 2005 | ||
| Int. Cl. H04L 12/56 (2006.01); H04L 12/26 (2006.01) | ||
| U.S. Cl. 370—392 [370/401; 370/469] | 47 Claims |
| 1. A router IP port for an IP router of an IP network system comprising:
an encapsulating unit including an input operably connected to an IP sub-network and an output operably connected to an Ethernet
unit and configured to encapsulate IP data packets received from the IP sub-network to generate Ethernet data packets and
to forward the generated Ethernet data packets to the Ethernet unit of said IP router;
a decapsulating unit including an input operably connected to the Ethernet unit and an output operably connected to the IP
sub-network and configured to decapsulate Ethernet data packets received from said Ethernet unit to extract IP data packets
to be forwarded; and
an egress filter unit including an input operably connected to the output of the decapsualting unit and an output operably
connected to the IP sub-network and configured to filter the extracted IP data packets in response to an internally generated
match signal which is generated based upon a logical comparison of an hierarchical destination address prefix of said extracted
IP data packets with configuration data.
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