From: Mark S. Detrick (mark@xxxxxxxxxxx)
Date: Sun Mar 26 2000 - 02:05:35 GMT-3
Ron,
Putting Intel NICs that are capable of ISL into servers and connecting them
via a trunk to Catalysts is possible. Actually, I have done this in a large
production network to reduce routing through the RSM. If you are using NT
make sure you don't do this on the PDC or BDC. The subinterfaces produced
by the NIC are the same as having a multihomed system. The PDC/BDC can not
be multihomed. Also, when using NT any of the servers that are trunked can
not be allowed to be Master Browsers. There is a problem with NT ability to
correlate the NetBios name to more than one IP, which is only a problem when
the system is a Master Browser.
Mark Detrick
----- Original Message -----
From: Ron Johnson <rjohnson@ebnetworks.com>
To: <ccielab@groupstudy.com>
Sent: Saturday, March 25, 2000 2:01 PM
Subject: RE: VLAN Design Question
> Can you do one-armed routing with an ISL capable NIC on a
> server? Is it possible? If not, is this an OS limitation or an ISL capable
> NIC driver issue.
>
> Just curious..
>
> -Ron
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Joe Martin
> Sent: Saturday, March 25, 2000 3:36 PM
> To: cisco@groupstudy.com
> Subject: Re: VLAN Design Question
>
>
> My using an ISL aware NIC card in your server, you will have the ability
to
> create "virtual" NIC cards attached to the physical NIC card in the server
> just like you create sub-interfaces on a router to talk to each VLAN.
Each
> "virtual" interface will then have an addresses assigned from each IP
> network. This will allow clients on each VLAN to talk directly to the
> server without going through a router.
>
> Hopefully this will seal the breach in your head gasket :-)
>
> JOE
> CCNP, CCDP, and a few other things...
>
>
> ""Ed"" <ewilliams91@com.hotmail> wrote in message
> news:8bjaok$cni$1@groupstudy.com...
> > I think I've thrown a mental gasket. I'm sure I'll figure this out
> > as soon as I've sent this, but here we go...
> >
> > I'm designing a switched environment where I'm going to have
> > 3 VLAN's. For the sake of argument we'll say that they are
> > 192.168.1.0, 2.0, and 3.0. I have a server which everyone
> > needs to access which I'm going to add an ISL aware
> > Gigabit card. What address can I assign to the server
> > that all 3 VLAN's can use so I don't have to cross a router?
> > The entire point of having an ISL aware card is to bypass
> > the router, but I would think the clients would need to see
> > it as local as well.
> >
> > I'm sure I'm making this more difficult than it needs to be.
> > Any suggestions are appreciated.
> >
> > Ed
> >
> >
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