|
North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Policy Statement on Address Space Allocations
>> Option 5: Provider X can announce nothing outside the area, except >> to people who are paying X for transit to all X-reachable sites >> and networks. >> >> This would work great if all the backbones touch down in the area. >> Customers out in the Rest of the World get transit through their >> backbone to all the area sites. Other regional networks or areas >> get transit to it via whomever they get global transit from. > >Which works fine as long as only one area on the planet ever implements >Option 5. Any pair of such areas without internal connectivity won't >be able to talk. >Seems like a scaling problem. No, they can talk just fine. In the worst case with asymetric paths, but they can talk fine. Backbones A and B, small providers a in region 1 and z in region 2. a buys transit to the world from A and is in the region 1 block. z buys transit to the world from B ans is in the region 2 block. a->z goes a->A. A knows about region 2 block, sends it to region 2. Once it reaches there, it either goes A->B->z or A->z if there is a direct interconnect somewhere. z->a goes out the z->B pipe, and thence to region 1 and either B->A->a or B->a if there is a direct interconnection somewhere. -george
|