From: Scott F. Robohn (sfr@xxxxxxxx)
Date: Tue Dec 07 1999 - 16:04:39 GMT-3
Here's how I look at FR:
(0) Always use subinterfaces, unless you have a good reason
not to.
(1) Use a point-to-point subinterface when you only need to
terminate a single PVC on that subinterface (e.g., two
routers in a point-to-point configuration). No frame map
statements are needed.
This approach makes for simpler FR config, but tends to use
more IP addresses.
(2) Use multipoint subinterfaces when you want to terminate
multiple PVCs on a single subinterface. To do this, you'll
either need frame map statements or you have to turn on
Inverse ARP.
Multipoint subinterfaces tend to conserve IP addresses, but
the FR config is a little more complex.
BTW, Inverse ARP only works for IP.
And I sat the class before I read the book, which might
explain why it was a bit clearer to me ;)
I'm scheduled for January 19-20 in RTP (second attempt).
Good luck,
Scott
"Mosley, Arthur" wrote:
>
> I've read Caslow's book and it's still a little confusing. I take his class
> in Feb 00.
>
> Is there a quick and dirty on when to use what scenario?
>
> Thanks,
>
> Art
>
> > ----------
> > From: Scott F. Robohn[SMTP:sfr@ccci.com]
> > Sent: Tuesday, December 07, 1999 1:33 PM
> > To: Mosley, Arthur; ccielab@groupstudy.com
> > Subject: Re: Frame-Relay configurations
> >
> > Art,
> >
> > How are you doing?
> >
> > I would point you to Bruce Caslow's book, 'Cisco
> > Certification: Bridges, Routers and Switches for CCIEs'.
> > His ECP1 class (based on the book) helped me clarify _many_
> > frame relay config options (point-to-point versus multipoint
> > subinterfaces, Inverse ARP, etc.).
> >
> > Good luck!
> >
> > Scott
> >
> > "Mosley, Arthur" wrote:
> > >
> > > What a good source on the various Frame-Relay configurations?
> > Specifically,
> > > when to use what configuration?
> > >
> > > Thanks.
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