From: Peter van Oene (pvo@usermail.com)
Date: Sat Feb 08 2003 - 23:58:00 GMT-3
At 01:18 PM 2/9/2003 +1100, you wrote:
>Hi friends,
>
>Can someone please explain to me what is the difference between the "level-1",
>"level-2" & "level-1-2" keywords for the summary-address command for ISIS? And
>should one use each of these keywords?
The level option specifies where the summary command should be applied. By
default, it is applied to any routes being injected into the L2
domain. However, you can change this to L1, or L1-L2. Hence, if you were
redistributing routes into an L1 domain on an L1-only router (cisco
supports this) you could use L1. Further, for routes leaked from the
backbone into an L1 area, you would need to specify L1 in the event that
you wanted to summarize in that direction.
I would suggest practising leaking routes into an L1 domain from the
backbone while summarizing to get a good feel for this (and correct me if
I've taken any liberties with the technology :)
Pete
>I have been using just "summary-address <10.0.0.0 255.0.0.0>" without any
>keywords,
>and it seems to always work fine...
>
>Thanks so much for your help in dvance,
>
>Best Regards,
>Hunt
>
>http://greetings.yahoo.com.au - Yahoo! Greetings
>- Send some online love this Valentine's Day.
>.
.
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