This may seem like nit-picking, but it isn't actually a revision of
802.1Q that supports
PVST, but rather, the vendor gear that supports PVST with the use of
802.1Q... Nortel
Passport (Accelar) switches support this as well...
-Brant
Rik wrote:
> Actually, most newer revisions of Dot1Q support PVST as well.
>
> Rik
>
> ""ciscosis"" <[EMAIL PROTECTED]> wrote in message
> 001301c0b3b7$aba8b000$593d839b@nes2s50667">news:001301c0b3b7$aba8b000$593d839b@nes2s50667...
> > ISL has a number of advantages over dot1q, for example it supports per
> vlan
> > spanning tree (PVST) which allows a separate spantree instance per Vlan
> > which makes networks more scalable and more stable than dot1q based.
> >
> > It is Cisco proprietary but it interoperates with dot1q (common spanning
> > tree) compliant switches (using Cisco protocol PVST+)
> >
> > If you are building a large cisco switched network with alot of Vlans and
> > are worried about issues such as spanning tree convergence/ stability
> > /reliability .. definately go for ISL
> >
> >
> >
> >
> >
> >
> >
> >
> > _________________________________
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