
From: postel@ISI.EDU
Date: Wed, 24 Jan 1996 15:46:05 -0800
To: nanog@merit.edu, cidrd@IEPG.ORG, iepg@IEPG.ORG, iab@ISI.EDU, iesg@ISI.EDU
Subject: Policy Statement on Address Space Allocations
Cc: iana@ISI.EDU, netreg@internic.net, ncc@ripe.net, hostmaster@apnic.net



Policy Statement on Address Space Allocations

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Regional Internet Registries (APNIC, InterNIC, RIPE NCC) refer
organizations requesting IP address space to their Internet service
providers (ISPs).  This is done for various reasons, the main reason
being that IP addresses need to be assigned hierarchically to allow
aggregation of routing information (CIDR).  Customers are warned of
possible routing restrictions if addresses are not received from an
ISP's CIDR block.  Since some ISPs are presently restricting the
length of prefixes they route, it is even more important for end users
to receive IP addresses from their Internet service provider.

Regional Internet registries have no control over the routing policies
of any ISP.  The IANA has instructed the Internet registries not to
assign IP addresses based on any ISP's particular routing policy,
rather on specific criteria including utilization efficiency.  An
organization will be assigned the number of IP addresses it can
justify.  If this number is not fully routable, that is an issue that
should be taken up with the ISP(s) concerned.

Regional Internet Registries inform ISPs about allocation and
assignment policies.  This enables ISPs to take these policies into
account when setting their routing policies.

s/ IANA, Internic, RIPE-NCC, AP-NIC.

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