Re: confederations and ASN allocation
Hi,
>> 4. Independent of amount of address space -- ASNs are allocated if
>> and only if the routing policy of a site differs from that of its
>> upstream providers. The only relationship between ASes and amount of
>> address space is that you need at least one (1) IP address to make an
>> ASN worthwhile. The determining factor is what routes you accept
>> from/announce to which of your providers. See RFC 1930 for details.
>What's if the only one IP address is that borrowed from his ISP?
Not particularly relevant.
>Let say, if a small university borrowed one class C block from ISP1.
What's a "class C block"? (:-)).
>And
>this university want to connect to another ISP (ISP2) for load sharing.
>Since only one IP block is enough so this university do not get IP block
>from ISP2.
Right. It does mean, however, that a more specific will be announced in
order to get the multi-homing desired. Since some ISPs filter more
specifics, there will be cases in which the university will get sub-optimal
routing.
>Is it possible for this university to request for it own ASN with the
>only IP block that borrowed from ISP1?
Sure.
Regards,
-drc
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