AW: Carrying Label

[John Smith <jsmith4112003@yahoo.co.uk>]

Hi Sakthivadivu,

Yes you are right. There is only one label always carried in BGP for the BGP/MPLS VPN
which maps to the BGP NEXT_HOP.

Cheers,
John

P.S.
And please try not to use HTML in public mailing lists !! :-)

----- Original Message ----- 
From: Sakthivadivu.S.S 
To: l3vpn@ietf.org 
Sent: Friday, November 14, 2003 3:51 PM
Subject: Carrying Label


Hi,
   The Carrying Label Infomation in BGP4  (RFC 3107) says in section 3 under heading b)
Label
 
   
    "  The Label field carries one or more labels (that corresponds to
         the stack of labels [MPLS-ENCAPS]).  Each label is encoded as 3
         octets, where the high-order 20 bits contain the label value,
         and the low order bit contains "Bottom of Stack" (as defined in
         [MPLS-ENCAPS]). "

   Can you please tell me when will more than one label be distributed in BGP upadte
message.
 
   Only LDP distributes two labels in the ATM scenario.
 
   Since the label in the BGP update message is associated with BGP nexthop,i feel that
only one label will be carried in BGP 
   update message  always. 
 
    Please correct me if i am wrong.
 
Regards,
Sakthi


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