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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Do ATM-based Exchange Points make sense anymore?
>Date: Fri, 09 Aug 2002 14:39 -0700 (PDT) >From: Mikael Abrahamsson <[email protected]> >Organization: People's Front Against WWW >To: [email protected] >Sender: [email protected] >Delivered-to: [email protected] >Delivered-to: [email protected] >Delivered-to: [email protected] >Subject: Re: Do ATM-based Exchange Points make sense anymore? > > >On Fri, 9 Aug 2002, Nenad Trifunovic wrote: > >> It appears that for analysis purposes one has to separate access >> from switching. How much payload one brings to the exchange depends >> on port speed and protocol overhead. In that light, Frame Relay >> can bring similar amount of payload as Ethernet (comparable overhead) >> and preserve good properties of ATM (traffic flow separation). > >What functionality does PVC give you that the ethernet VLAN does not? > I am not sure how this question may help analyzing the problem. For one thing, one can just pose the question the other way around (what functionality does VLAN give you that does not exist in Frame Relay (with closed user groups + LMI; that has been around for quite some time)). >What is the current max speed of frame relay in any common vendor >implementation (I'm talking routers here). > >-- What is current changes. Same technology can be applied to both Ethernet and Frame Relay encapsulation. Ability to bring more traffic to the exchange in itself may not be useful if there is no ability to switch it. >Mikael Abrahamsson email: [email protected] > nenad
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