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Resource Policy Manual - DRAFT

10. Reverse delegation

This section describes the policy for reverse delegation of IPv4 and IPv6 assignments and allocations in the AFRINIC service region. Please note that AFRINIC registers only reverse delegations and is not involved in the domain name registration system.

 

10.1 Introduction

AFRINIC provides support to enable applications to map to a domain name from an IP address. Reverse delegation is achieved by use of the in-addr.arpa (IPv4) and ip6.arpa (IPv6) domains.

 

10.2 Obtaining Delegation of an in-addr.arpa sub-zone

AFRINIC only accepts requests for reverse delegation under in-addr.arpa from AFRINIC active LIRs. End Users must send their requests to the LIR from which they obtained the addresses, or in the case of Provider Independent addresses, to any of the LIRs of their choice. AFRINIC will carry out tests to ensure that the name server for the zone that the reverse delegation is being requested is up and configured as per the recommendations in RFC1912.

 

10.3 Reverse Delegation for Provider Aggregatable (PA) Address Space

 AFRINIC will only make delegations on 8-bit boundaries (/16 or /24). Multiple delegations may be requested to cover CIDR prefixes shorter blocks bigger than a /24.

 

10.4 Reverse Delegation for Provider Independent (PI) Address Space

 AFRINIC will reverse delegate a zone in in-addr.arpa to an End User that has been assigned PI space.

For delegations of address blocks smaller than a /24 the method described in "Classless IN-ADDR.ARPA Delegation"[RFC 2317] will be used.

 

10.5    Validity of the Reverse Delegation


10.5.1 Membership


AFRINIC accepts requests for delegation and modifications of delegations from LIRs whose membership status is up-to-date.

 

10.5.2 No Reverse Unless Assigned


LIRs and End-Users are restricted from obtaining reverse delegation (rDNS) services from AFRINIC unless the address space is assigned or sub-allocated in the AFRINIC Database.

10.5.2.1 AFRINIC will no longer grant reverse delegation of IP address space that it administers unless an assignment or sub-allocation of the specific address space is registered appropriately in the AfriNIC Database.

10.5.2.2 For a /24 reverse delegation, at least one assignment or sub-allocation must be registered in the AfriNIC Database for that specific /24. The entire /24 does not have to be assigned in order for the reverse delegation to be allowed.
 
10.5.2.3 AFRINIC will contact those LIRs who currently have reverse DNS for allocations, but have not registered any assignments or sub-allocations under those allocations to remind them of this requirement. These LIRs will have 12 (twelve) months from the date of the reminder to register their assignments or sub-allocations.
 
10.5.2.4 AFRINIC may remove reverse delegation of any LIRs allocation beginning 12 (twelve) months from the date of the reminder.

 

10.6    IPv6 Reverse Delegation

IETF consensus was reached that the ip6.arpa domain be used for address to DNS name mapping for the IPv6 address space. Refer to RFC2874 and RFC3596.

Delegation of the ip6.arpa domain is done by the Intenet Assigned Numbers Authority (IANA). Names within this zone are delegated to Regional Internet Registries in accordance with their respective delegation of IPv6 address space. 

 

(Page 10 of 11)

Comments   

 
# Mark Elkins 2013-11-29 17:27
The Soft Landing section is missing the 10%rule (what percentage can be used outside of the area). As this was the first thing I looked for - I have no idea what else might be missing.
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# EB 2014-01-10 14:06
Mark,

The "10%" requirement appears to have been removed at one point during the revisions and discussions. The final content restricting out-of-region usage reads: "AfriNIC resources are for AfriNIC service region and any use outside the region should be solely in support of connectivity back to the AfriNIC region"

See 3.8 of http://www.afrinic.net/en/library/policies/697-ipv4-soft-landing-policy
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