Re: BGP Question - how do work around pigheaded ISPs

[Sean Donelan <sean () donelan com>]

On Fri, 09 February 2001, "Roisman, Dani" wrote:
> A parent organization has an unused /16 of address space, for arguments
> sake, let's say it's 172.16.0.0/16.  It's out of the old "class B" address
> range.  Two groups within the organization want to bring up independant
> Internet datacenters, and need /18 of address space, each.  Since the parent
> organization owns an unsed /16, the IP registry refuses to give the child
> organizations any address space - they insist all address blocks assigned to
> the parent organization be used, first.
>
> ISPph (ph=pigheaded) has a BGP policy that filters out all routes in
> 128.0.0.0/2 longer than /16.

Return the 172.16.0.0/16 block to the registry (ARIN, APNIC, RIPE or if
no one else IANA) and apply for multiple appropriately sized CIDR blocks
under the current registry allocation guidelines.