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Watson-Ethernet-Manual.doc

Version 3.3-01

Watson Ethernet

Operating Manual

Revision: 2010-01-20

7-19

CIR

Committed information rate -> ingress rate limit [in bps],

[1..100M, OFF]. Use the RATELIMIT OFF to turn off

rate limiting for this port.

CBR

Committed burst size -> buffer depth reserved for

bursts [in bytes],

If the port has flow control enabled (i.e. PAUSE in full duplex mode or jamming in

half duplex mode), flow control shall be triggered if the buffer is over the limit. In

other modes the frames simply get discarded.

Due to the embedded memory size of 64 KB, the CBS is limited to ~32 KB.

Larger values may be configured, but have no effect on Ethernet performance.

SCHEDULING Policy

Determines the scheduling policy.

Policy

STRICT Strict priority scheduling. Higher priority

queues are emptied before any lower

priority queue is processed. Note that

strict priority scheduling can lead to

starving of lower priority queues. Starv-

ing can be avoided either by rate limit-

ing or by using WFQ scheduling.

WFQ Weighted fair queuing. Queues are

emptied with weights 8:4:2:1 applied to

the priorities.

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