From: BUI, TIN T (SBCSI) (tb4565@xxxxxxx)
Date: Fri Jan 05 2001 - 14:21:16 GMT-3
On the ccie lab I would definitely read the instructions. In most cases,
you probably want to use the following convention: N1.N2.x.x where N1.N2 is
the main OSPF network being advertised on that router such as (150.100.0.0).
The x.x can be determined from router number. Example would be if you have
router 1 and one of the area 0 network is 150.100.20.0, then your loopback
would be 150.100.1.1. Also, to make it accessible, just add this loopback
to one of the OSPF areas that is convienent.
> Tin T. Bui
> Senior Network Manager
> Network Management Center
> SBC Services Inc.
> 7337 Trade Street, Rm 1110
> San Diego, Ca 92121
> Office #: 858-886-4644/858-886-4589
> Pager #: 858-494-0482
> Fax #: 858-549-4103
> Email: tb4565@sbc.com
>
-----Original Message-----
From: Rahmlow, Howard F. [mailto:howard.rahmlow@unisys.com]
Sent: Friday, January 05, 2001 6:43 AM
To: 'Curtis Phillips'; ccielab@groupstudy.com
Subject: RE: A lab loopback strategy
Make sure you check with the proctor before you create any loopbacks that
are not called for in the test document. Also make sure you read, and
re-read the part of the test, that may or may not state that all interfaces
must be pingable from any other interface. I got burned on this during one
test. I had created a loopback, for a specific protocol, and got the ok from
the proctor. But I forgot to make sure I could ping it, from anywhere on the
network. Lost those points.
Howard.
-----Original Message-----
From: Curtis Phillips [mailto:phillipscurtis@netscape.net]
Sent: Friday, January 05, 2001 9:22 AM
To: ccielab@groupstudy.com
Subject: A lab loopback stategy
Hello,
I was thinking about a loopback addressing atategy for the lab and wondered
whether others had developed a specific plan. I consider loopbacks essential
for OPSF adjacency development, BGP internal peering sessions,and probably
for
the introduction of network segments into the configuration.
I think it would be nice to create loopbacks that identify the router of
origin, For example 1.1.1.1 for router 1, 2.2.2.2 for router 2 etc.
As any OSPF RIDs would be altered by addition of higher numbered loopback
addresses, is there a strategy the anticipates this?
Although real-world practice may be to use loopbacks to source BGP updates
for
IBGP, does anyone see any problems with using physical interfaces in the lab
environment?
Anything else I am missing here?
Thanks,
Curtis
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