From: Wu,Jiang (wujiang@xxxxxxxxx)
Date: Wed Oct 11 2000 - 23:26:35 GMT-3
I can provide a real-world application.
In my company, we have one DDN line and one ISDN line connected to the Interne
t. The policy is the DDN used for some servers to be visited from the outside a
s well as some power users to visit the out world, all other internet access sh
ould go through the ISDN line. Originally, I accomplished it use IP address fil
ters and policy routing. One morning I found someone else was using my IP addre
ss when my computer was down. So I decided to use MAC address filters to preven
t such things though I need to move the ISDN line to another router. While from
my knowledge, only IRB can accomplish the work.
Wu
----- Original Message -----
From: Kevin Baumgartner <kbaumgar@cisco.com>
To: Bolcer, Matt <matt.bolcer@eds.com>
Cc: <ccielab@groupstudy.com>
Sent: Thursday, October 12, 2000 1:42 AM
Subject: RE: ISL Trunking & Subinterfaces
> That's what I though you were trying to get at. For me I am using this
> list to study for the lab and trying to avoid getting into questions like
> "would I do this in a real network". I have been burned a couple of times
> be using this approach in the lab test. There are a lot of what I consider
> strange or not what I consider good design type questions and answers.
> I guess the theory with why these questions are asked are to see if you
> really understand your stuff and can get it working in a non-standard way.
>
> Kevin
>
> At 01:26 PM 10/11/00 -0400, you wrote:
> >just trying to provide some insight for real-world application, agree that
> >the lab could ask for this
> >
> >-----Original Message-----
> >From: Kevin Baumgartner [mailto:kbaumgar@cisco.com]
> >Sent: Wednesday, October 11, 2000 1:08 PM
> >To: Bolcer, Matt
> >Cc: ccielab@groupstudy.com
> >Subject: RE: ISL Trunking & Subinterfaces
> >
> >
> >Why is it a negative for the lab? I agree in a really network you may want
> >to limit your use of BVI's but in the lab test anything goes.
> >They are not testing the packet throughput per interface. Just that your
> >network works.
> >
> > Kevin
> >
> >
> >At 12:40 PM 10/11/00 -0400, you wrote:
> > >remember that BVI's are process-switched so it's a negative
> > >
> > >-----Original Message-----
> > >From: Lawrence Dwyer [mailto:ldwyer@icscorp.com]
> > >Sent: Wednesday, October 11, 2000 11:49 AM
> > >To: Justin van Schaik; ccielab@groupstudy.com
> > >Subject: RE: ISL Trunking & Subinterfaces
> > >
> > >
> > >
> > >IRB
> > >bridge on the subinterface and route on the BVI
> > >
> > >-----Original Message-----
> > >From: nobody@groupstudy.com [ mailto:nobody@groupstudy.com
> > ><mailto:nobody@groupstudy.com> ]On Behalf Of
> > >Justin van Schaik
> > >Sent: Wednesday, October 11, 2000 11:27 AM
> > >To: ccielab@groupstudy.com
> > >Subject: ISL Trunking & Subinterfaces
> > >
> > >
> > >Question posed to me by a friend ...
> > >
> > >Scenario:
> > >3 separate ISL trunks going into one router. Each trunk gets its own
> > >subinterface (of course).
> > >
> > >Caveat:
> > >You can't assign ip addresses on the subinterfaces.
> > >
> > >Question:
> > >How do you setup routing between ISL trunks if you can't get an ip address
> > >on the subinterface?
> > >
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