Ok what I found is:
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat5000/cnfg_nts/supvr/
Which can be summarised as:
Hardware:
Supervisor I is engine for 2900
Supervisor II is engine for 2926
Any Supervisor can be used in a 500x series switch.
Only Supervisor II and Supervisor III can be using the 550x series switches.
Features:
Supervisor II and Supervisor III support redundant supervisor engine option
available in the 5500 and 5505.
Supervisor III boots differently from other Supervisors - has both a ROM
monitor and supervisor engine software
Questioned:
Supervisor III has Phoenix ASIC for using all three 1.2Gbps BUS's in a 550x
to full 3.6Gbps.
I say that last one is questioned because while a SupII can be used in a 550x I
remember from studying for my CLSC Exam that only the SupIII had the Phoenix
ASIC in it which made full use of the 3 bus's work.
Please correct me and provide a reference if I'm wrong.
Darren
Albert wrote:
> There is more than just memory difference between the two Sup.
> The major difference is the backplane. The Sup 1 can only access one
> backplane (Cat 5000/5002). Sup 2 can access three backplane (Cat 550Xs).
> For VLAN lab, Sup 1 with IOS 4.x is just fine.
>
> Albert
>
> ""Mark Holloway"" <[EMAIL PROTECTED]> wrote in message
> 007701bfc92a$1354d7c0$[EMAIL PROTECTED]">news:007701bfc92a$1354d7c0$[EMAIL PROTECTED]...
> > I know the Catalyst 5000 Supervisor 1 engine only supports LAN Switching
> IOS
> > 4.x and lower due to the 16MB memory limit. Some Sup 2 modules only
> support
> > 4.x, some support 5.x, but are there really any advantages to running IOS
> > 5.x versus 4.x? If not, are there any advantages of 4.x on a Sup 2 versus
> a
> > Sup 1? Do they all support ISL?
> >
> > Thanks,
> > Mark
> >
> >
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