mpls doubts

hi experts

plz help me with the following queries ?

1) what is ment by ldp - igp synchornisation . ? by default its disabled
....what benifits i will get if i enable it ?

2) in the follwoing output outgoing actiion is Aggregate ...what does it
imply ? i have not done summarization any where ....

R6#SHO MPLS Forwarding-table
Local Outgoing Prefix Bytes tag Outgoing Next Hop
tag tag or VC or Tunnel Id switched interface
16 Untagged 155.1.45.0/24 0 Et0/0.146 155.1.146.4
17 17 150.1.5.5/32 0 Et0/0.146 155.1.146.4
18 Pop tag 150.1.4.4/32 0 Et0/0.146 155.1.146.4
19 Aggregate 155.1.67.0/24[V] 520
20 Aggregate 155.1.76.0/24[V] 520
3) why is it required that two PE must use loopback interface for BGP
sessions ? why it is required that these loopback must be /32 route ?

thanks in advance

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Received on Fri May 20 2011 - 18:34:48 ART