Dear SIG members
The proposal "prop-110v001: Designate
1.2.3.0/24 as Anycast to support
DNS Infrastructure" has been sent to the Policy SIG for review. It will
be presented at the Policy SIG at APNIC 37 in Petaling Jaya, Malaysia,
on Thursday, 27 February 2014.
We invite you to review and comment on the proposal on the mailing list
before the meeting.
The comment period on the mailing list before an APNIC meeting is an
important part of the policy development process. We encourage you to
express your views on the proposal:
- Do you support or oppose this proposal?
- Does this proposal solve a problem you are experiencing? If so,
tell the community about your situation.
- Do you see any disadvantages in this proposal?
- Is there anything in the proposal that is not clear?
- What changes could be made to this proposal to make it more
effective?
Information about this policy proposals is available from:
Andy, Masato
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prop-110v001: Designate
1.2.3.0/24 as Anycast to support DNS
Infrastructure
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1. Problem statement
--------------------
Network 1 (
1.0.0.0/8) was allocated to APNIC by the IANA on 19
January 2010. In line with standard practice APNIC's Resource Quality
Assurance activities determined that 95% of the address space would
be suitable for delegation as it was found to be relatively free of
unwanted traffic [1].
Testing, conducted by APNIC R&D found that certain blocks within
Network 1 attract significant amounts of unwanted traffic, primarily
due to its unauthorised use as private address space [2].
Analysis revealed that, prior to any delegations being made from the
block,
1.0.0.0/8 attracted an average of 140Mbps - 160Mbps of
unsolicited incoming traffic as a continuous sustained traffic level,
with peak bursts of over 800Mbps.
The analysis highlighted individual addresses such as 1.2.3.4 with
its covering /24 (identified as
1.2.3.0/24) remain in APNIC
quarantine and it is believed they will not be suitable for normal
address distribution.
The proposal proposes the use of
1.2.3.0/24 in a context of locally
scoped infrastructure support for DNS resolvers.
2. Objective of policy change
-----------------------------
As the addresses attract extremely high levels of unsolicited
incoming traffic, the block has been withheld from allocation and
periodically checked to determine if the incoming traffic profile has
altered. None has been observed to date. After four years, it now
seems unlikely there will ever be any change in the incoming traffic
profile.
The objective of this proposal is to permit the use
1.2.3.0/24 as a
anycast addresses to be used in context of scoped routing to support
the deployment of DNS resolvers. It is noted that as long as
providers who use this address use basic route scope limitations, the
side effect of large volumes of unsolicited incoming traffic would
be, to some extent mitigated down to manageable levels.
3. Situation in other regions
-----------------------------
Improper use of this address space is a globally common issue. However
the block is delegated only APNIC and so therefor, no other RIR has
equivalent policy to deal with the situation.
4. Proposed policy solution
---------------------------
This proposal recommends that the APNIC community agree to assign
1.2.3.0/24 to the APNIC Secretariat, to be managed as a common
anycast address to support DNS infrastructure deployment
Any party who applies to APNIC to use this address block on a
non-exclusive basis to number their DNS resolver will receive a
Signed Letter of Authority to permit their Autonomous System to
originate a route for
1.2.3.0/24, and APNIC will also publish a RPKI
ROA designating the AS as being permitted to originate a route. This
ROA shall be valid until APNIC is advised otherwise by the AS holder.
5. Advantages / Disadvantages
-----------------------------
Advantages
- It will make use of this otherwise unusable address space.
- DNS operators will have an easy-to-remember address they can use to
communicate with their users (e.g. configure "1.2.3.4" as your DNS
resolver")
Disadvantages
- The address attracts a large volume of unsolicited incoming
traffic, and leakage of an anycast advertisement outside of a
limited local scope may impact on the integrity of the DNS service
located at the point associated with the scope leakage. Some
operators with high capacity infrastructure may see this as a
negligible issue.
6. Impact on APNIC
------------------
Although this space will no longer be available for use by a single
APNIC/NIR account holder, the proposal would result in benefit for
all APNIC community members, as well as the communities in other
regions.
There is the need to set up an administrative process in the
reception of applications to use the address block, and in the
maintenance of a set of ROAs associated with these applications
References
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[1] Resource Quality Good for Most of IPv4 Network “1”