North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Confussion over multi-homing
> > Yep, this has been a topic here before...no real resolution. You didn't > > really need to prove the case, it has already been proven. > > No. From a post I made to this list on 6/22/2000: > > ++> Here's the deal. If you number out of Provider1's CIDR block > ++> but advertise your more-specific to Provider2 and the two Providers > ++> touch and Provider1 accepts the more-specific route from Provider2, > ++> you should have no problem reaching anyone. > ++> > ++> Here's the reason: Everyone accepts Provider1's announcement of the block. > ++> When your link to P1 is up, any traffic they recieve for your prefix > ++> gets routed over that link since they carry your more-specific internally. > ++> However, if other providers here the more-specific from P2, they'll > ++> send directly via P2 who sends it over the link to you. But if your chunk of space is greater than /20, the other providers will filter P2's announcement of your space and you are back to square one. Well, at least you won't be cut off from the entire Internet, I guess that's something. Square 1.5. Austin
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