[c-nsp] GSR ge-gbic-sc-b traffic limit?

[kostas anagnopoulos]

You're right. ISE uses SFPs

Strangely enough when traffic was getting close to 3G there wasn't any
appreciable
delay in the packets going through the card!
>From a case i had with cisco in the past they reported that the true cell
bandwidth
of the ISE 4xGE line card is 4G - the term ISE OC48 (2.5 Gbps) is somewhat
misleading
If they are correct, 25% of this 4G is used for header/crc in each 64B
ciscocell and a buffer
header which is only included in the first cell of the packet, not in
subsequent cells.
In the most efficient case, where the size of the L3 packet is close to a
multiple of 48B/cell
the card can reach 3G also in theory

regards,
Kostas

-----Original Message-----
From: Pete Templin [mailto:petelists at templin.org]
Sent: Tuesday, March 07, 2006 6:37 AM
To: kostas anagnopoulos
Cc: Kevin Scheunemann; cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] GSR ge-gbic-sc-b traffic limit?


kostas anagnopoulos wrote:
> Is it an ISE line card ?
>
> show diag 1 | include L3
>   L3 Engine: 3 - ISE OC48 (2.5 Gbps)
>
> show inter gig 1/2
> show inter gig 1/2 | include bits/sec,
>   30 second input rate 582604000 bits/sec, 82116 packets/sec
>   30 second output rate 57706000 bits/sec, 26254 packets/sec
>
> Have seen ISE GiGe cards reaching ~3Gbps total traffic in real world

Notice the subject: ge-gbic.  The only ISE card with Gigabit Ethernet
interfaces uses SFPs, not GBICs.

And 3Gbps would be quite a stretch - it's only a 2.5Gbps connection to
the fabric.

pt

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