From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Thu Feb 10 2005 - 13:43:06 GMT-3
Tim,
IMHO this is very bad usage of the word "area" by whoever wrote
this document. When the document says "router isis [area-name]",
area-name is simply a locally significant process-id. This value does
NOT relate to the actual link state area that the IS resides in.
Instead, the actual "area" is defined by the NET address.
<cco>
Step 3
router isis area-name
Example:
Router(config)# router isis area2
Enables IS-IS for the specified IS-IS routing process, and enters
router configuration mode.
Step 4
net network-entity-title
Example:
Router(config-router)# net 49.0001.0000.0000.000c.00
</cco>
In the above example IS-IS is enabled with a process-id of
"area2". The IS actually resides in area 49.0001, as defined by the NET
address. The only time you need to reference the "area-name"
(process-id) is when you have multiple IS-IS processes. For example you
could have "ipv6 router isis 1" on one interface and "ipv6 router isis
2" on another interface. In that case the processes, and hence
link-state domains, are completely independent of each other. It would
be just like running EIGRP on one interface and OSPF on another.
HTH,
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
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> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> ccie2be
> Sent: Thursday, February 10, 2005 9:24 AM
> To: Group Study
> Subject: ipv6 ISIS
>
> Hi guys,
>
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/
ip
> v6_
> c/sa_isis6.htm#wp1036755
>
>
> I'm confused with the usage of the area-name parameter in the example
from
> the
> above link.
>
> This example shows the area-name parameter in the summary steps used
with
> the
> router isis command, but in the detailed it doesn't use this
parameter.
>
> However, in interface mode, it shows the area-name used with the ipv6
> router
> isis command.
>
> The command reference doesn't offer much help either.
>
> 1) When do I need to use the area-name parameter with the router isis
> command?
>
> 2) Assuming this parameter is used with the interface command, ipv6
> router
> isis, and has a value of AREA-1, where else in the config will this
> parameter
> also need to be used? For example, will it have to be used on all
other
> router interfaces connecting to this same link?
>
>
> TIA, Tim
>
>
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