BGP Case Remove /24, Hoping took over by /23

Posted on January 17, 2008. Filed under: BGP, Cisco, Juniper |

Purpose : Load Balancing Traffic
Schenario : Moving /24 from Juniper (connected to Upstream 1) to Cisco (conncted to Upstream 2) Core Routers.
Steps :

– Remove /24 from Juniper
– Keep /23 on Cisco
– Clearing BGP session on both

Looking-glass & Route-Server outputs still hold /24 on their routing table.
Crosscheck to Direct Upstream no more /24.
Issue ? Why /24 holds by each Route-Server/Looking Glass server outside ?

An idea to come : Create manually /24 on Cisco Core and readvertise to Uptream 2.
Done, remove /24 and clearing BGP session remains similar routing table outside.
Pretty strange againts normal changing.

Some said, it takes even 15 minutes to take effect if above steps not a choice for you ?

a. rahman isnaini r.sutan
tks, to IWI for share.


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