North American Network Operators Group|
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Re: sell shell accounts?
Here is the senario I was thinking about Case 1 R1 --- R2 --- R3 Case 2 R1 --- SW --- R3 | | R2 Assume that the wide area segments are the same in both cases and that SW and R2 are collocated. In case 1 there are 2 router hops between R1 and R3. In case 2, given a full mesh of PVCs, R1 and R2 are only one hop apart. This does not imply that the traffic flows any differently relative to the physical paths taken, but if I do a traceroute I think it will look different. Am I missing the point here? Jim > > > If you have full use of the fiber across which you move your packets you > > can create a mesh of PVCs directly connecting each router thus decreasing > > the hop count. The same can be done when using an existing cell-relay cloud, > > but you pay on a per pvc basis so the benefit needs to be weighed against the > > cost. Of course the packets still flow along the same physical path and in a > > wide area network the time in transit will be more significant than the time > > to get through the routers. > > > > Jim > > Nope, remember - there is no magic. Any mesh of PVCs that one makes > over a switched network must reflect the toplogy of that network, and > one can set up a matching set of active routing sessions and route > weights which will cause traffic to flow the same way. > > Yes, the switches are a bit faster and have less to do. Data moves through > them in a few ms less per point. But as you said (and as I said in our > discussion in NYC), relative to any distance, the speed of light guarantees > that you won't notice the difference. > > The question is: Will there be routers available that can make IP > routing decisions based on 40-60kroutes and move 2-3 OC3s worth of > bidirectional traffic? The building of the configs to have a routed > network work the same as a switched ATM one can be automated, but it's > true that it *can be* easier to see what's going on in a large-scale > switched network. > > Avi > > - - - - - - - - - - - - - - - - -