Provider
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... prefix should be placed in an
AS of the provider. The site's prefix has exactly the same rout-
ing policy as the other customers ...
... prefix has exactly the same rout-
ing policy as the other customers of the site's service
provider, and there is no need to make any distinction in rout-
ing information.
...
... In some situations, a single site, or piece of a site, may find
it necessary to have a policy different from that of its
provider, or the rest of the site. In such an instance, a sepa-
rate AS must be created ...
... group of prefixes
which connects to more than one service provider (i.e. more than
one AS with its own routing policy ...
... * Transition / "future-proofing"
Often a site will be connected to a single service provider but
has plans to connect to another at some point in the future.
This is not enough of a reason to create ...
... need it. The AS number space is finite and the limited amount
of re-engineering needed when you connect to another service
provider should be considered as a natural step in transition.
* History
...
...
1) If provider A and provider B have a large presence in a
geographical area (or other routing ...
...
1) If provider A and provider B have a large presence in a
geographical area (or other routing domain ...