From: Marvin Greenlee (marvingreenlee@yahoo.com)
Date: Fri Apr 23 2004 - 18:10:27 GMT-3
One 'Gotcha' can be knowing whether they are asking
for multi-area or multihoming.
Multihoming runs both NETs under the same process,
effectively merging the areas together.
Router isis
Net 49.0001.1111.1111.1111.00
Net 49.0002.1111.1111.1111.00
Multiarea is configuring multiple IS-IS processes with
tags.
Int Eth0
router isis TEST02
Int Eth1
router isis TEST01
Int Ser0
router isis BB
router isis BB
net 49.2222.0000.0000.0005.00
!
router isis TEST01
net 49.0553.0001.0000.0000.0005.00
is-type level-1
!
router isis TEST02
net 49.0553.0002.0000.0000.0005.00
is-type level-1
Reference - Cisco - IS-IS multi-area support
http://www.cisco.com/en/US/customer/products/sw/iosswrel/ps1830/products_feature_guide09186a00800e9780.html#wp1034096
Multi-area:
Max 1 Level 2 area
Level 1 processes are independent
Cannot redistribute between processes
Can redistribute external routing sources into each
area independently
Multihoming:
Can have multiple Level 2 areas
Level 1 databases merged
Marvin Greenlee
marvin@ccbootcamp.com
www.ccbootcamp.com
--- Kenneth Wygand <KWygand@customonline.com> wrote:
> Hey everyone,
>
>
>
> I was under the impression that there are some
> "gotcha's" when
> performing ISIS migrations (putting multiple ISIS
> areas on a single
> router). However, after reading Doyle's TCP/IP
> Routing Volume 1, he
> seems to imply this is a relatively simple task;
> just install multiple
> areas on a single router and it will form
> adjacencies with neighbors
> that have at least one area in common.
>
>
> Am I missing something? Any gotcha's, pitfalls,
> recommendations? Since
> I have little industry experience on ISIS, I really
> don't want an ISIS
> "gotcha" to be the cause of another failing grade.
> :-(
>
>
>
> Thanks to all in advance!
>
>
>
> Kenneth E. Wygand
> Systems Engineer, Project Services
>
> CISSP #37102, CCNP, CCDP, ACSP, Cisco IPT Design
> Specialist, MCP, CNA,
> Network+, A+
> Custom Computer Specialists, Inc.
>
> "I am not really smart. I just stick with problems
> longer."
> -Albert Einstein
>
>
>
> Custom Computer Specialists, Inc.
>
> "Celebrating 25 Years of Excellence"
>
> [GroupStudy removed an attachment of type image/gif
> which had a name of image001.gif]
>
>
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