[c-nsp] /18 and multihomed BGP

Thu Aug 12 08:21:29 EDT 2010

Hi all,

I'm BGP multihomed with 2 ISPs and have a /18 subnet.
I declared the /18 block in RIPE database as 64 /24.
I'm adding a new ISP and he asked me to modify the 64 /24 in RIPE to 
a unique /18.
How does this change affect the existing routing with 2 former ISPs?
How can I announce a /24 prefix from one ISP to another? He is 
talking about "no export", what is the purpose of this attribute?

BR