[c-nsp] 6500 sup32 v sup720

[Ed Butler]

The Sup32 and Sup720-3B have the same 239k IPv4 prefix limitation in
their TCAMs.

This should last 12-18 months at current table growth rates. 

Regards,

Ed Butler
RapidSwitch Ltd
DDI: 020 7106 0731

RapidSwitch Ltd, 5th Floor, Sovereign House, 227 Marsh Wall, London, E14
9SD

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-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Alex Foster
Sent: 07 August 2006 22:24
To: Asbjorn Hojmark - Lists
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] 6500 sup32 v sup720

Many thanks for your comments Asbjorn....I think I know where Im headed
and is isnt down the sup32 route...
 
You highlighted the sup32 has TCAM limitations - does this apply to the
sup720-3B as well ??  From what other list memebers have said were
looking at around 200k prefixes currently - so the sup32 would be able
to handle this (at the moment) - however, not fully understanding the
current growth of the internet (in terms of prefix saturation) - it
would be difficult to say the sup32 would be good for the next few years
(unless Cisco improve the sup32 - does anybody know if this is this
likely or indeed possible).
 
Im getting some good pricing on the sup720-3BXL - so I think barring any
feedback that tells me to avoid the 3BXL at all costs, I will go with
this.
 
Again thanks for your time in replying.
 
Alex
 
 

________________________________

From: Asbjorn Hojmark - Lists [mailto:lists at hojmark.org]
Sent: Mon 07/08/2006 20:33
To: Alex Foster
Cc: cisco-nsp at puck.nether.net
Subject: RE: [c-nsp] 6500 sup32 v sup720



> Would appreciate your thoughts and comments on this...or indeed is the

> 6500 the best box to go with - I have a good budget and basically need

> a box capable of receiving full routes/upto 2Gbps traffic rates/and 
> plenty of optical GigE and 10/100/1000 interfaces.

As others have said, you should go the the Sup720-3BXL because of the
TCAM limits of the Sup32, which can 'only' be tuned to 239k prefixes.

Other differences:

Sup32 has eight on-board GE ports, slightly better queueing and
scheduling on the uplink ports, two USB ports, and more onboard flash.

The Sup720 has a 360 Gbps switching fabric (the 32 has only a 16 Gbps
shared bus), supports distributed forwarding for a total of 400 Mpps,
and has a slightly more powerful router CPU. It is sold with a base ($0)
license for IP Services vs IP Base on the Sup32 (10 k$ diff).

The Sup720 also supports the new high-density, high-performance modules
in the 67xx series, such as 6724 (15 k$ for 24 ports and
20Gbps) or the 6748 (20k$ for 48 ports and 40 Gbps) vs 6516A (15 k$ for
16 ports and 8 Gbps).

The PFC on the Sup720 is also field-upgradable, so one can swap the
PFC3B for a PFC3BXL (or PFC3CXL, when time comes). Whether the same will
be possible for the Sup32 remains to be seen.


In *my* opinion, the Sup32 makes little sense. But they ship lots of
them, so I guess other people see this differently.

-A



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