FAST-PATH IMPLEMENTATION FOR AN UPLINK DOUBLE TAGGING ENGINE

• US 20090196289A1
• Filed: 04/21/2009
• Published: 08/06/2009
• Est. Priority Date: 10/07/2002
• Status: Abandoned Application

• Current Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Ambe, Shekhar, Yu, Song-Huo, Shankar, Laxman
• Application Number:
  US12/427,553
• Publication Number:
  US 20090196289A1
• Time in Patent Office: Days
• US Class Current: 370/390
• CPC Class Codes: H04L 12/1886 with traffic restrictions for efficiency improvement, e.g. involving subnets or subdomains
• CPC Class Codes: H04L 12/4666 Operational details on the addition or the stripping of a tag in a frame, e.g. at a provider edge node
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/15 in relation to multipoint traffic arrangements for broadcast or multicast in data networks H04L12/18
• CPC Class Codes: H04L 47/2408 for supporting different services, e.g. a differentiated services [DiffServ] type of service
• CPC Class Codes: H04L 47/2425 for supporting services specification, e.g. SLA
• CPC Class Codes: H04L 47/2433 Allocation of priorities to traffic types
• CPC Class Codes: H04L 47/2458 Modification of priorities while in transit
• CPC Class Codes: H04L 49/354 for supporting virtual local area networks [VLAN]

Abstract

A network component for processing a packet can include a buffer configured to receive a packet in an ingress port at a network component, a first identification unit configured to identify a destination address and a network identifier from the packet received at the buffer, and a look-up table configured to be indexed by the destination address and the network identifier identified by the identification unit to obtain an outgoing port bit map. In addition, the network component can include a forwarding unit configured to forward the packet to a destination module and out of an egress port within the network component based on the outgoing port bit map.

Claims

1. A system for processing a packet in a network component, said system comprising:

a first receiving means for receiving a packet in an ingress port at a network component;

a removing means for removing a packet tag from the packet;

a first obtaining means for obtaining a multicast index and a multicast type from indexing the packet tag to a look-up table;

an appending means for appending the packet with the multicast index and the multicast type;

a first modifying means for modifying an operation code of the packet to multicast when the multicast type is a first predetermined type;

a second modifying means for modifying the operation code of the packet to an IP multicast when the multicast is a second predetermined type;

an assigning means for assigning a first class of service for the packet with a packet tag priority; and

a first forwarding means for forwarding the packet to a first egress port.