[nsp] Catalyst 5000(5500) over 4000(4500)???

[Joe Marr]

You could purchase a RSM for the 5500 series switchs. That should get
you the features you need.

Joe Marr


-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of mac at telvia.it
Sent: Friday, April 18, 2003 10:06 AM
To: David Sinn
Cc: cisco-nsp at puck.nether.net
Subject: Re: [nsp] Catalyst 5000(5500) over 4000(4500)???

Thanks,

if no IOS on 5000 i assume no L3 capabilites (i need qos and FULL BGP 
routing capabilites), i'm right?
Seems to me that I can live with the fixed ports 3550 is  a better 
value (L3/L4 QoS)
4500 is very nice but cost a lot and I don't need all the features.

Other options from cisco?

Thanks
Spin

On Thursday, April 17, 2003, at 01:04  AM, David Sinn wrote:

> The 5000 has a single 1.2 Gig switching bus.  The 5500 series has
three
> 1.2 Gig switching buses, and depending on platform the line cards
touch
> one of those buses based on slot (exception being some line cards that
> can touch all three if they are in certain slots).  Sup2's bridge all
> three of the buses into one 1.2 Gig bus, while the Sup3 runs each
> independently and does some special work to move packets between the
> buses.  There is shared intelligent between the line cards and the
> supervisor, with each taking part in the overall flow of packets.  
> CatOS
> is you only option in the 5000 series.
>
>
> The 4000 series is an entirely different beast, but also varies
> depending on the Supervisor you choose.  In a nutshell the line cards
> are little more then media converters.  There is not a bus per-say,
but
> rather the equivalent of 6 Gig ports per line card slot.  How those 6
> ports are leveraged is based on the line card that you use:  6 ports
of
> non-blocking Gig, 14/18 ports Gig with some being oversubscribed,
> 48-ports of 10/100 muxed into 6 Gig streams, etc.
>
> Depending on the Supervisor you choose will get you different levels
of
> performance:
>
> The SupII effectively segments the box in to three groups of 10 Gig
> ports (2 per slot for each of the five slots).  These group of 10
ports
> are then switched by an independent ASIC.  The three ASIC's are then
> linked together by either 1 or 2 Gig's, depending on whether you
enable
> the two Gig ports on the Supervisor.  You can only run CatOS on the
> SupII.
>
> The SupIII & SupIV is a 32Gig switch, where all of the ports (30 for 
> the
> line cards & two on the front of the Sup) land on one ASIC who 
> centrally
> switches them.  You also gain L3 routing abilities with these
> Supervisors, and must run IOS on them.
>
>
> Your overall bandwidth requirements & projections should probably
> dictate what platform you choose.  Either can work well as long as you
> understand their respective performance envelopes, and plan 
> accordingly.
>
> David
>
> -----Original Message-----
> From: mac at telvia.it [mailto:mac at telvia.it]
> Sent: Wednesday, April 16, 2003 7:06 AM
> To: cisco-nsp at puck.nether.net
>
> Hi all,
>
> i have to upgrade our network core. I have to choose between a new
4005
> or a used 5000 (supervisor 2). Someone can explain the main difference
> between the two series (apart the 5000 is EOL).
>
> Regards
>
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