if you have a Cisco-only switch architecture I would use ISL between the
Catalysts - per-vlan STP is *VERY* useful for resilience and load-balancing
purposes.
I would use dot1q for attached servers where necessary - since they are
end-stations there is not the requirement for them to participate int STP.
my #0.02 (is 0.02 UK pounds worth more than $0.02?)
Andy
> >
> >Hi Guys,
> >i have a question for you.
> >
> >In my site i have to project a new network architecture.
> >
> >I would organize the Resource human in V-LAN. Of course all V-LAN have to
> >access some services (example DNS, E-Mail, Domain Controller etc. etc)
and
> >not others.
> >
> >The NIC interfaces of my servers permit the 802.1Q encapsulation.
>
> Ensure that the host does not route between the VLANs, as this kills your
> security policy.
>
> >I would make the TRUNK between switches (Catalyst 4000 - access Layer and
> >Catalyst 6500 -Core Layer) with ISL trunk.
>
> Why not just use dot1q?
>
> >Can i map the 802.1Q trunk on ISL trunk? And how could i do this ?
>
> No, they are similar products, but IIRC some switches support both
products,
> so you could use ISL on one trunk, and dot1q on another.
>
> >Please indicate me link where i can find a example of this configuration
?
>
> I would recommend dot1q everywhere.
>
> >Regards, Carmelo
>
> Rob./
>
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