Method and apparatus for controlling packet header buffer...

Details Method and apparatus for controlling packet header buffer... Method and apparatus for controlling packet header buffer...

2005-01-25

2005-01-25

Sam, Phirin (Department: 2661)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S389000, C709S238000

Reexamination Certificate

active

06847645

ABSTRACT:
A method and apparatus manages packet header buffers of a forwarding engine contained within an intermediate node, such as an aggregation router, of a computer network. Processors of the forwarding engine add and remove headers from packets using a packet header buffer, i.e., context memory, associated with each processor. Addition and removal of the headers occurs while preserving a portion of the “on-chip” context memory for passing state information to and between processors of a pipeline, and also for passing move commands to direct memory access (DMA) logic external to the forwarding engine. A wrap control function capability within the move command works in conjunction with the ability of the DMA logic to detect the end of the context and wrap to a specified offset within the context. That is, rather than wrapping to the beginning of a context, the wrap control capability specifies a predetermined offset within the context at which the wrap point occurs.

REFERENCES:
patent: 6101599 (2000-08-01), Wright et al.
patent: 6424659 (2002-07-01), Viswanadham et al.
patent: 20010049744 (2001-12-01), Hussey et al.
U.S. Appl. No. 09/791,063, M. Rachepalli et al.
U.S. Appl. No. 09/791,968, W. Brandt et al.
Cisco 7200 and NPE Hardware Overview, Cisco Systems, Inc. 1999; pp. 1-35.

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