The GSR has the route-leaking feature in 12.0S and 12.0ST code.
The route-leaking is also supported in 12.1
CLI
12.1
redistribute isis ip level-2 into level-1 distribute-list <acl>
12.0S
advertise ip L2-into-L1 <acl>
At this time both the commands are supported. But 12.0S CLI Syntax will
be changed to 12.1 Syntax.
Wrt multiple ISIS processes - this is called "Multi-area" support.
I don't think it is available on GSR (?) -
Please look into the following URL for more information.
http://www.cisco.com/warp/public/cc/pd/iosw/prodlit/1078_pp.htm#12149
/Shankar
! From cisco-nsp-request@puck.nether.net Thu Apr 26 06:55:20 2001
! X-From_: Damon.Pegg@Carrier1.com Thu Apr 26 08:20:22 2001
! Received-Date: Thu, 26 Apr 2001 08:20:16 -0400
! From: Pegg Damon <Damon.Pegg@Carrier1.com>
!
! Anyone know a GSR code which allows L2 to L1 ip route redistribution within
! a process? Also, anyone running code on GSRs which allows multiple ISIS
! processes? I need to inject all as-wide router loopback addresses carried
! across my L2 backbone into L1 for optimal routing to my bgp next-hop
! addresses and this puppy is a real stumbling block...
!
! Damon Pegg IP Backbone Engineer Carrier1 www.carrier1.net
! "If you can look into the seeds of time, and say which grain will grow and
! which will not, speak then to me."
!
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