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Cell Relay Retreat>MPLS-OPS Archive>month:2002-Dec> msg00183



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BGP-MPLs interface defination and working

  • From: Mehwish Ahmed <mehwishkhurshid@yahoo.com>
  • Date: Tue, 24 Dec 2002 19:42:46 -0800 (PST)
  • Resent-Date: Wed, 25 Dec 2002 00:04:40 -0500
  • To: mpls-ops@mplsrc.com

aslam o alakum

In case of BGP-MPLS, how interface are defined at PE and at CE.Like if_1 ,if_2 and if_3 are  interfaces of site1 site2 and site3 at PE roting table for directly connected sites1,2,3.but there r some internal interface like if_x and if_z which r defined at CE routing tables that i guess if_x for figuring out if packet is destined for same site and if_z if packet is destined for site connected via VPN.
refrence http://www.juniper.net/techcenter/techpapers/200012-03.html
my question is how these interfaces are defined and when interface information is mapped to packet?? or on which bases CE decides its a if_x or if_z and also how Pe decides its if_1 or if_2 ???
 


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