From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Thu Dec 04 2003 - 20:21:42 GMT-3
By logical I mean one IP logical subnet. There is no problem with
physical hub-and-spoke circuits. The easiest way to avoid the many problems
that logical hub and spoke brings with it is to use point-to-point IP
subnets. Simply create a point-to-point subinterface for each circuit that
you have.
HTH,
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Direct: 708-362-1418 (Outside the US and Canada)
> -----Original Message-----
> From: rnasr [mailto:rnasr@s2n.com.au]
> Sent: Wednesday, December 03, 2003 4:49 PM
> To: 'Brian McGahan'
> Subject: RE: ISIS over Frame-Relay
>
> Could you please clarify. BY logical - I assume you are meaning both
> point-to-point and multipoint subinterfaces. Is that correct. If so then
> the isis network point-to-point only applies to physical interfaces over
> NBMA.
>
> Thanks,
> rjn.
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Brian McGahan
> Sent: Friday, December 05, 2003 9:26 AM
> To: 'pita40'; 'Ahmed'; ccielab@groupstudy.com
> Subject: RE: ISIS over Frame-Relay
>
>
> IS-IS does not run over logical hub-and-spoke. You'll need to
> create two point to point IP subnets either by readdressing the cloud or
> adding GRE tunnels.
>
> HTH,
>
> Brian McGahan, CCIE #8593
> bmcgahan@internetworkexpert.com
>
> Internetwork Expert, Inc.
> http://www.InternetworkExpert.com
> Toll Free: 877-224-8987
> Direct: 708-362-1418 (Outside the US and Canada)
>
>
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> > pita40
> > Sent: Thursday, December 04, 2003 2:33 PM
> > To: Ahmed; ccielab@groupstudy.com
> > Subject: Re: ISIS over Frame-Relay
> >
> > THis link has the command you need.
> > 12.2(8)
> >
> >
> http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/1
> > 22t/122t8/ftissp2p.htm#1026660
> >
> >
> > You can also use tunnels to solve the problem if the above is not
> allowed.
> >
> >
> >
> > ----- Original Message -----
> > From: "Ahmed" <ahmed_mustafa01@excite.com>
> > To: <ccielab@groupstudy.com>
> > Sent: Thursday, December 04, 2003 2:04 PM
> > Subject: ISIS over Frame-Relay
> >
> >
> > > How would I overcome the problem running ISIS over Frame-Relay in
> > Hub/Spoke Environments: Here is the issue: Hub Router: configured as
> > P2M,
> > so the default network type is p2MOne Spoke: Configured as Non-
> > Broadcast2nd
> > Spoke: Configured as P2P. Note: Interface configuration can't be
> > changed.
> > In OSPF environments, one can easily fix this by using "IP OSPF NETWORK"
> > Command, but there is no such command for ISIS, I guess, unless 12.2
> > offers
> > something which I don't know. The only thing I come up with use Tunnel
> > interfaces that could build the adjanceny b/w the routers without
> > violating
> > any rules. Thanks in advance, Abbas
> > >
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