IS-IS route leaking question

From: David Hurtado (dei2viccie@hotmail.com)
Date: Thu Apr 01 2004 - 12:09:18 GMT-3


Hello everybody,

When configuring IS-IS route leaking you need to use the following command:

redistribute isis ip level-2 into level-1 distribute-list <100-199>

and an extended IP ACL.

In this extended IP ACL you establish:

Source address: route to be redistributed from Level-2 to Level-1

Destination address: ??????

I have reviewed the following link looking for an answer:

http://www.cisco.com/en/US/tech/tk365/tk381/technologies_tech_note09186a0080093f39.shtml

but it doesn't offer any example. IE workbook uses "host 255.255.255.0" as a
destination and it works. I have also tried "any" as destination address and
it works too for the topology i'm working on. If i try a random network
address it doesn't work, so the destination address should be relevant.

What i want to know is:

1- Which is the purpose of the destination address in the ACL?

2- Why using 255.255.255.0 as destination address the route leaking works?

Thanks for the help



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