LAB 14 Task 5.5 BGP Best Selection

From: ismail el-shalh (ishelh_mdsa@yahoo.com)
Date: Sat Aug 05 2006 - 18:32:41 ART


  First of all I have to admit that LAB 14 made me pull my hair ,
   
  TASK 5.5
   
  * Advertise VLAN 4 and 5 into BGP
  * Traffic from AS 54 destined to these prefixes should come in the FR link between R6 and BB1
  *Traffic for these prefixes should only come in from BB3 if the link between R6 and BB1 is down.
   
   
  in the beginning, I decided not to look into the solution and I configured the task via sending MED of 100 to BB3 for those two prefixes from R1,R3 and R6, also I sent Med of 50 of these prefixes toward BB1 from R6 only.
   
  when I looked into the solution I found Brian did it via prepending AS into the path, fine, for me It is fair because either prepending AS or setting MED can do the job.
   
  but I became very sad when I saw the configuration of R5 because I could not figure out what Brians mean to say , why are they aggregating the subnet 167.1.0.0 ? and what is the secret behind the set ip next-hop 167.1.135.5 which is a local hop address !
   
  HELPPPPP
   
  Ismail

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This archive was generated by hypermail 2.1.4 : Fri Sep 01 2006 - 15:41:56 ART