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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re:
There's another option for IXP architecture, virtual routers over a scalable fabric. This is the only approach which combines capacity of inverse-multiplexed parallel L1 point-to-point links and flexibility of L2/L3 shared-media IXPs. The box which can do that is in field trials (though i'm not sure the current release of software supports that functionality). --vadim On Tue, 9 Jan 2001, Masataka Ohta wrote: > > Randy; > > > > BGP Route Reflector IXPs need a AS number. I'll send you a URL with a > > > whitepaper. The BGP Route Reflector IXPs have proved to offer a low entry > > > cost for ISPs (for those places that do not have the deep pockets to get > > > big routers). > > > > except that big routers are not needed for small-isp exchanges. remember, > > an isp participating in such an exchange has only to add the prefixes of > > their local peers to their routing, typically a dozen or so. there are very > > successful layer-two exchanges where the peers use what we think of as cpe > > routers, e.g. cisco 2501s. and what's nice is that this is on the right > > path to exchange growth. > > > > l3 exchange ponints are a labor suck and are fragile. > > Maybe. However, l2 is for telco. > > l2 exchange ponints are a labor suck and are fragile. > > The right path is l1, though, then, there is less reason to have > exchange points. > > It will be more obvious as the peering speed between two ISPs exceeds > that of a single physical interface. > > Masataka Ohta >
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