Do all service providers accept /24's via BGP?

Discussion in 'Cisco' started by James, Mar 7, 2007.

  1. James

    James Guest

    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, Mar 7, 2007
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  2. James

    chris Guest

    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

    chris, Mar 7, 2007
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  3. James

    James Guest


    Do you have any idea what prefix is "safe"?
    James, Mar 8, 2007
  4. James

    chris Guest

    Depends on the ISP. Everyone's policy is different.
    chris, Mar 10, 2007
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