Re: Cisco DS3 performance specifications

[Neil J. McRae]

The cards are engine 0 and there is no hardware switching - I've seen
issues on this card - one port has heavy load and the other ports
start dropping packets, WRED helped with this but not by much. I'd
be interested in your tests.

Regards,
Neil.

> 
> To any and all in earshot,
> 
> I am engaged in setting up a sytems level test lab for the purposes of
> measuring
> among other items, DS3 performance and interoperability between Cisco 12000
> series
> and several new and emerging edge switch devices.
> 
> In order to set a baseline for performance expectations, I am attempting to
> gather
> historical data on earlier testing.
> 
> The nasty rumor I am hearing is that Cisco DS3 interfaces at best deliver 50
> - 60 % throughput.
> This is supposedly attributed to the way they apply their Traffic Shaping
> and Policing at the port level. 
> 
> I need to obtain documentation that either validates this, or presents the
> correct information.
> 
> Many of the edge devices involved in the testing, support high levels of
> throughput
> even at the channelized subrate. An increased need to buffer the data, to
> compensate
> for a potential mismatch in bandwidth capabilities, would just add to the
> latency
> and sour the testing.
> 
> Any and all information is valued and appreciated. 
> 
> 
> 
> 
> 
> 
> 
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>