North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Links on the blink - reprise
At 07:30 AM 11/18/95 -0500, Mike O'Dell wrote: > >don't confuse the link encoding with back-haul design > Don't confuse backhaul design with excessively high concentrations of PVCs, grossly oversubscribed in ratio of aggragate ingress bandwidth. If you don't drop the bits on ingress, you at least stand a fighting chance of getting them (the bits) onto the backbone in the first place. :-) >if the network is deeply over-subscribed, you will drop packets. >the only question is "where?" > Where indeed. >whether the link uses F/R-1490 framing or cisco HDLC doesn't change >that. > This has nothing at all to do with it. Regardless of the frame-relay encapsulation, the fact that one can oversubscribe at ingress exists and lends itself to what Vadim calls 'too may points of indirection'. A private line only has two end-points (let's not discuss imuxes). The possibility of sloppy or careless engineering is just a tad higher when building frame-relay networks. This does not mean that sloppiness can't be avaoided; it certainly can. Just a thought, - paul
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