The MPLS-OPS Archive

["M. ELK" <elkou141061@hotmail.com>]

Hi

 

For the case that customer carrier sites is pure IP .

Customer carrier say CSC-CE1 is advertising internal route (/32) in site 1 to

backbone carrier CSC-PE1  using IPV4BGP label distribution .

 

Case 1 :

 Those internal routes are part of the IGP and using  BGP "network" statements on CSC-CE1 to be included in the BGP table .

 

Is CSC-CE1 advertise :

1) a different label value to each internal routes

Or

2)"Implicit_Null" as label for all internal routes .  

 

If "1" : At CSC-CE1 what wil be the label action assigned .

         is it A- "Untag"

               Or

               B- "Aggregate" .

 

Case2 :

 Each node in Site1 will have L0 amd L1 address .

 L0 is known via the IGP but not L1 .

 Each node propagate L1 through iBGP full mesh

  (all nodes in site1 run iBGP)

 CSC-CE1 will propagate L1's for all internal nodes to CSC-PE1 .

 

  Same enq as case1 ,ie: CSC-CE1 behaviour as "1A" ,"1B" or "2" .

 

 Case2 is included to see if the internal routes are  leraned through

  different way (IGP or iBGP) will influenece CSC-CE1 behaviour .

 

  I guess that all ( "1A","1B" or "2") are workable ,but "1B" is

  less efficient than "2" and "1A" is better than "2" .

  Iintersted to know  what the method selected by the major manufacturer .

 

 

Brgds

 

 

 

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