[c-nsp] 7600-SIP-400

[Phil Bedard]

The throughput is 4GB/s full-duplex at 40 byte packets.  The  
throughput is
5Gb/s full-duplex at 64 byte packets, and that's why on the GSR its a  
2.5Gb/s
line card (up to OC48).

I tested the SIP-400 with the OC48 SPA and had no problems running  
IMIX or random packet
size traffic at line rate full-duplex.  I couldn't use less than 64- 
byte packets with the tester so
I didn't really get to see the point where it would break the SIP  
before I ran out of bandwidth on the
OC48.

I was also able to run one OC48 and one OC12 SPA on the same SIP-400  
and achieve line rate on each full-duplex using
an IMIX.   However, the SIP will complain since it has the notion of  
bandwidth capacity given the SPAs that populate the
SIP, a la bandwidth points on the VXR.   It works, but it may be an  
unsupported configuration. I have inquired about that and
haven't received an answer yet.

The only real limitation with the PPS rate I could see is a DoS  
attack where the packet size is <64 bytes, then
you could theoretically run out of processing power on the SIP before  
you fill your OC48.

Phil

On Jun 30, 2007, at 9:13 AM, Robert Blayzor wrote:

> Cisco's datasheet doesn't seem to be as detailed on the SIP-400 as  
> it is
> on the SIP-600.  I'm trying to understand the limitations of the
> SIP-400.  The datasheet claims it has a CPU throughput of "4Gbps".   
> Does
> that mean that the SIP-400 cannot handle a single OC48 POS SPA at
> full-duplex/line rate?  Or is the 4Gbps limitation full duplex (8Gbps)
> as the SIP-600 is 20Gbps?
>
> -- 
> Robert Blayzor
> INOC
> rblayzor at inoc.net
> http://www.inoc.net/~rblayzor/
>
> Life's unfair - but the root password helps!
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