Catalyst's 4003 also don't support ISL , just dot1q.
You can see that by show port capabilities
Henrique Issamu Terada
CPM Comunica��es - Brazil
CCNA Certified
----- Original Message -----
From: Darren Ward <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, May 29, 2000 5:16 AM
Subject: ISL Support [was Re: Cat 5000 Sup 1 and Sup 2 differences]
> Hi Flem,
>
> I'm trying to find it.
>
> I had a case logged regarding why there was no ISL of the new 2948G
> switches we bought and the answer was that they now only support dot1q
> trunking.
>
> The link the case I opened is now no longer visible but I found the
> following:
>
> Features of 2948G, you'll notice only 802.1Q VLAN's and VTP Supported.
>
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2948/inst_gd/01intro.
htm
>
> Hmmm.. I can't find any references on any statements just yet, but from
> the discussion I had with the TAC during the case they said that they
> were moving away from proprietory protocols where an equivalent was
> supported as in the case of ISL and 802.1Q
>
> Like most things I think we'll see ISL still supported in most future
> releases but it's interesting that the 2948G definately has no ISL
> support at all.
>
> Darren
>
> Flem wrote:
>
> > Hi Darren ,
> >
> > Do you have a reference on cco stating that cisco will
> > no longer support ISL in the future ?
> >
> > thanks,
> > flem
> >
> > --- Darren Ward <[EMAIL PROTECTED]> wrote:
> > > Well the advantage is that I saw was that some
> > > switching modules are supported
> > > in 5.x that aren't supported in 4.x
> > >
> > > I think it was the 36 port 10/100 switching modules
> > > from memory.
> > >
> > > I think there might have also been something with
> > > NetFlow enhancements in 5.x
> > > over 4.x?
> > >
> > > Both do support ISL but remember Cisco themselves
> > > have stated that they will not
> > > support ISL in the future and that VLAN's should use
> > > dot1q from now on.
> > >
> > > In fact there are some 28xx and 29xx switches that
> > > now cannot support ISL!
> > > I know the 2824G with new software cannot for sure!
> > >
> > > Darren
> > >
> > > Mark Holloway wrote:
> > >
> > > > 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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