Hi Margaret,
>>2. By the statement,
>> "IPv6 site-local addresses be limited to use on isolated,
>> single-site networks.",
>>
>> are you prohibiting the network below?
>>
>> Global IPv6 Internet ------- SBR ------ Node with
>> Global IP and
>> Site-Local IP
>
>Exactly. This would not be an isolated, single-site network,
>as it is connected to the global Internet.
In the Atlanta meeting, I voted for the Moderate usage.
The choices were as below:
- Limited usage
only used in disconnected sites
no multi-site nodes
- Moderate usage
simple site-border router
no multi-site host or router requirements
two-faces/split DNS
- Full usage
require all nodes to be multi-site
routing protocols aware of site boundaries
multi-site DNS
and the poll result was:
No consensus: ~30 Remove, ~51 Limited, ~57 Moderate, ~17 Full
I know that you are writing for the Limited usage, but your document
does not leave the possibility of the Moderate usage at all.
IMO, "8.2.1 Benefits for Newly-Connected Sites" in your document
is most beneficial point of site-local addresses for enterprise networks.
In many cases, enterprise networks are not required to have connectivity
to the IPv6 Internet from the beginning. It is much like a deployment
(transition) scenario, but a company can start using IPv6 as its intranet
now. Allowing site-local addresses co-exiting with global addresses
makes a transition from IPv6 Intranet to IPv6 Global Internet easier.
Manual renumbering of site-local addresses to global addresses does
not occur at one shot. Even if IPv6 WG comes up with
"provider-independent global addresses", we may face the similar
issues as site-local addresses. (Sorry if it's not.)
I have NOT understood the concept of "provider-independent global addresses"
completely.
For the reason above, Site-local is beneficial for Newly-Connected Sites
if the simple connected site case is allowed.
Global IPv6 Internet ------- Simple SBR ------ Node with
or Global IP and
Filer Site-Local IP
addresses
This kind of IPv6 deployment is far easier for the enterprise networks.
I have been thinking how to deploy IPv6 in the the enterprise networks
for more than a year.
Very nice work on documenting the site-local issues, anyway.
Thank you,
HIROKI ISHIBASHI
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