North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: ISP operational question
The assumption that your initial allocation of address space is going to be a /20 is probably incorrect. Allocation of address space is based on a slow start procedure outlined in RFC2050. What usually happens is that you request enough address space to be at 50% immediate utilization and 80% utilization within 3 months. To receive a contiguous /20 will probably require multiple IP requests and plenty of renumbering. =P t Charles Smith wrote: > Please consider the following scenario: > > A new company wants to become a regional ISP. This company will purchase one > or two large bandwidth circuits from a NSP of their choice. > > Then the new regional ISP will offer private line p2p Internet service to > regional businesses. Basically, this is a small operation. > > Now here is the question. What choices does the regional ISP have when > implementing routing and IP addressing? I assume the regional ISP will not > implement BGP, since there will only be one maybe two upstream connections > to a single NSP - initially. > > Furthermore, I assume the NSP would provide the regional ISP with a supernet > - say a /20 or so. Then the regional ISP would allocate subnets of the > supernet to their customer - say /24s. > > I also assume the regional ISP would not require an AS number since they are > not implementing BGP. Basically, all traffic from the regional ISP and > customers is default routed to the single upstream connection. > > Are these assumptions valid? Is this a good configuration? I realize > multiple upstreams from different providers is optimal, however not > plausdable in this case. > > Your constructive insight to the scenario is appreciated. > > Chas > _____________________________________________________________________________________ > Get more from the Web. FREE MSN Explorer download : http://explorer.msn.com -- <!-- Todd Caine - [email protected] Electric Lightwave, Inc. 4400 NE 77th Avenue Vancouver, WA 98662 Direct Dial: (360) 816-4344 //-->
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