From: Geert Nijs (geert.nijs@simac.be)
Date: Mon Jul 19 2004 - 09:43:40 GMT-3
:-)
There are three ways to advertise a loopback into OSPF with its original mask.....
Do you know all three of them ?
1) ip ospf network point-to-point
2) redistribute connected (appears as an external network, may not be allowed)
3) ??? rarara
put the loopback into a seperate area
summarize the loopback address into the backbone :-)
network x.x.x.x 0.0.0.0 area 20
area 20 range x.x.x.x 255.255.255.0 (assuming /24 mask)
Regards,
Geert
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
jb
Sent: zondag 18 juli 2004 20:28
To: Kenneth Wygand; James; diptish doshi
Cc: ccielab@groupstudy.com
Subject: Re: Put the loopback in appropriate Area or Routing Domains
.....
Kenneth,
Original mask for loopback is /32
the IP OSPF NETWORK point to point change this to /24
I'm wondenring
How can I do the same without utilizing the mentioned above command?
Thanks
Jojo
----- Original Message -----
From: "Kenneth Wygand" <KWygand@customonline.com>
To: "James" <james@towardex.com>; "diptish doshi"
<diptishdoshi007@yahoo.com>
Cc: <ccielab@groupstudy.com>
Sent: Sunday, July 18, 2004 12:53 PM
Subject: RE: Put the loopback in appropriate Area or Routing Domains .....
> I agree with James. However, when they say "most appropriate area", you
> must also consider other criteria as well. For example, maybe they want
> you to advertise a loopback with the original mask, but they prohibit
> you from using the "ip ospf network" statement. You are also required
> to enter this network into OSPF with the "network" command (cannot
> "redistribute connected"). In this case, what other consideration
> should you keep in mind when choosing the most appropriate area?
>
> Kenneth E. Wygand
> Systems Engineer, Project Services
> CISSP #37102, CCNP, CCDP, ACSP, Cisco IPT Design Specialist, MCP, CNA,
> Network+, A+
> Custom Computer Specialists, Inc.
> "The only unattainable goal is the one not attempted."
> -Anonymous
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> James
> Sent: Sunday, July 18, 2004 1:17 PM
> To: diptish doshi
> Cc: ccielab@groupstudy.com
> Subject: Re: Put the loopback in appropriate Area or Routing Domains
> .....
>
> On Sun, Jul 18, 2004 at 08:34:42AM -0700, diptish doshi wrote:
> > hi all ,
> >
> > Many a times in ospf configurations it is written
> > " Put the loopback in the appropriate area " ... im a
> > bit confused with it ... as i dont understand as to on
> > what criteria and what scenario should i consider
> > while taking that decision ....
> > Same is the case when there are various routing
> > domain in the router and we have to put the loopback
> > in the " APPROPRIATE " domain ...
> > Can anybody guide me ... how to select this so
> > called APPROPRIATE thing .????
>
> To me, I usually interpret this statement as:
>
> "Put the loopback in the backbone area, or in an area that is closer
> toward
> the Backbone."
>
> -J
>
> --
> James Jun TowardEX
> Technologies, Inc.
> Technical Lead Network Design, Consulting, IT
> Outsourcing
> james@towardex.com Boston-based Colocation & Bandwidth
> Services
> cell: 1(978)-394-2867 web: http://www.towardex.com , noc:
> www.twdx.net
>
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