Proposal for fixing the relationship between Ipv4 address allocations and Globally visible routing announcements.
James Spenceley
Abstract:
In order to contain (possible) exponential routing table growth, the proposed change is to limit the number of globally visible routes associated with each (individual) RIR allocation. The size (number of addresses) of individual allocations continues to be based on current and foreseeable usage requirements.
In order to provide a suitable level of flexibility, each address block by-default should have an associated limit of 2 globally visible announcements.
Views:
Policy is currently un-enforceable, however positive step.
With the current usage of BGPv4 by "Networks/NSP/ISP" there is little or no way technical way for APNIC to control or limit announcements for give allocations. It does however provide the frame-work and indeed ground-work for an APNIC IRR style authority server, should networks migrate to utilising this and BGP route keys or secrets, APNIC would have acceptable level of control over globally visile announcements of RIR allocated address space. The comparison should be drawn to current address allocations, should a membership cease there is currently little recourse for APNIC to stop the member continuing to announce their APNIC address block.
Limit shouldn't be set in stone, as with current APNIC resource allocations if more global announcements are required then a similar process (to the second-opinion requests) should be in place to increase this resource. Members apply to increase the announcement limit, within this application submits technical requirements for the increase. Correct technical requirements should be the only reason for de-aggregation of address allocations. Where a member's requirement for announcements is deemed inappropriate, information/alternative solutions/education can be offered with the reject message.
Proactively addressing the issue exponential routing table growth can create a long-term framework to address issues of member de-aggregation and protect the global visibility of smaller announcements.
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