Developer Forum

We have recently acquired a /24 from APNIC and are advertising this
range with BGP via two ISP's.

We configured BGP between ISP1 twelve days ago and ISP2 seven days
ago. Our second ISP casualy mentioned after the BGP configuration,
despite several meetings beforehand, that not all service providers
and organizations accept /24 prefixes into their BGP tables.

This would appear to be true - out of the five websites that I visit
daily, two are not accessable when I translate myself using an IP from
our /24 range.

Has anyone else come across this problem?

At the moment the fix appears to be to ask APNIC for a /22 which is a
complete waste of address space.....

James

In my experience *most* ISP's will accept a /24 prefix but I beleive that
some will not. If you have only a /24 then you run the risk of routing
problems. Seems silly I know but given the increase in size of the global
BGP routing table some ISP's will take measures to reduce it whereever
possible.

Chris.

Thanks.

Do you have any idea what prefix is "safe"?

Depends on the ISP. Everyone's policy is different.