On 1/25/14, 14:14 , Adrian Farrel wrote:
Hi Russ,
Thanks for this. The -03 revision just posted addresses my comments.
Adrian
Russ,
I also like the -03 revision, its has generally moved everything in the
right direction. But I have a few comments on it.
1. The part about RFC2860 in Section 1 seems like an incomplete thought,
at the very least it seems awkward to me. I'm really not sure what you
are intending to say. But, I agree RFC2860 is relevant to the
discussion. I'm just not sure you have nailed what to say about it.
2. I really like the idea of creating a "Special-Purpose AS Number
Registry". However, it may be a better idea to spin-off the creation of
a "Special-Purpose AS Number Registry" into a separate draft. I'm
concerned that trying to do two important things in the same document
will fail to achieve one or both of the important things. For instance
the simple section 3 you have currently worries me. I'd really think
RFC6890 is the template to use for creating a "Special-Purpose AS Number
Registry", more below.
If you spin-off the creation of a "Special-Purpose AS Number Registry",
the following items are for that draft.
3. There is a draft in WG Last Call in the IDR that documents the
reservations of ASNs 65535 and 4294967295, the "Last ASNs".
http://tools.ietf.org/html/draft-ietf-idr-last-as-reservation-01
4. As I said, I like the idea of creating a "Special-Purpose AS Number
Registry", but it should have certain information recoded about each AS
number range. This information should be similar to the format
described in Section 2.2.1 of RFC6890 for the "Special-Purpose IP
Address Registries" for IPv4 and IPv6, that you reference elsewhere in
the draft.
First, there should be general information describing each of the
special-purpose ASN ranges, essentially the first half of the columns
specified in Section 2.2.1 of RFC6890;
o AS Number Range - An AS number or range of AS numbers that has been
registered for a special purpose.
o Name - A descriptive name for the special-purpose AS number range.
o RFC - The RFC through which the special-purpose AS number range was
requested.
o Allocation Date - The date upon which the special-purpose AS number
range was allocated.
o Termination Date - The date upon which the allocation is to be
terminated. This field is applicable for limited-use allocations
only.
Then, information specific to how the special-purpose ASNs are to be
used. There may be others as well, I but I think these are the minimum.
o Local - A boolean value indicating whether an AS number from the
allocated special-purpose AS Number range is valid when used as the
value of the "My Autonomous System" field of a BGP OPEN message, or
equivalently in the Capability Value of the "support for four-octet
AS number capability".
o Global - A boolean value indicating whether an ASN from the allocated
special-purpose ASN range is valid in the AS_PATH or AS4_PATH
attributes when advertised to the global Internet.
o Reserved-by-Protocol - A boolean value indicating whether the
special-purpose address block is reserved by BGP, itself. This
value is "TRUE" if the RFC that created the special-purpose ASN
range requires all compliant implementations to behave in a special
way when this ASN is used.
I believe this is the table for these last three items
ASN Range Local Global Reserved-by-Protocol
--------------------- ------- ------- --------------------
0 FALSE FALSE TRUE
23456 TRUE[1] TRUE[1] TRUE
64496-64511 FALSE FALSE FALSE
64512-65534 TRUE FALSE FALSE
65535 FALSE FALSE FALSE
65536-65551 FALSE FALSE FALSE
4200000000-4294967294 TRUE FALSE FALSE
4294967295 FALSE FALSE FALSE
[1] Only valid in a BGP OPEN message or AS_PATH, not valid within a
four-octet AS number capability negotiation or AS4_PATH.
Thanks.
--
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