On Wed, Jun 15, 2016 at 09:53:39AM +0200, Pierre-Philippe F4MZI wrote:
Minimum netmask size for BGP is /24.
Correct. The operators of the networks which make up the Internet backbone
have chosen not to accept BGP advertisements that are narrower than a /24,
possibly to minimize the number of entries in the global routing table,
so if you choose DIRECT (BGP) as your subnet connection method, the portal
adjusts your netmask up to a /24 if you have chosen something smaller.
Note that to have a BGP-advertised subnet, you must have arranged with
your Network Service Provider that they will in fact supply you with
a connection based on their advertising your subnet to the Internet
backbone as being CIDR-routed. It is unusual for NSPs to do this;
many won't and others charge a significant amount for the service.
You should NOT select Direct in a portal allocation request unless you
have arranged for this service from your NSP.
In any case, your subnet will be connected to the Internet by at most
ONE method: Radio, Tunnel, or Direct, and might not be connected at all,
so select at most ONE of the connection method boxes in the allocation
request. (I have asked that these selections be changed to a pulldown
list or radio buttons so that it is impossible to select more than one;
until that happens, requests having more than one box checked are likely
to be rejected.)
- Brian