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- Path: sparky!uunet!haven.umd.edu!darwin.sura.net!dtix!mimsy!ra!atkinson
- From: atkinson@itd.nrl.navy.mil (Randall Atkinson)
- Newsgroups: comp.dcom.cell-relay
- Subject: Re: Future of IP routers
- Message-ID: <3435@ra.nrl.navy.mil>
- Date: 25 Aug 92 16:33:13 GMT
- References: <1992Aug24.184659.1879@gandalf.ca> <22264@venera.isi.edu> <1992Aug25.123428.26295@ccsun.strath.ac.uk>
- Sender: usenet@ra.nrl.navy.mil
- Distribution: na
- Organization: Naval Research Laboratory, DC
- Lines: 27
-
-
- Router vendors I've talked to (e.g. at the Boston IETF)
- indicate that handling ATM at OC-3c rates (~155 Mbps) is not a problem
- with existing technology. A number of well known router vendors are
- adding support for ATM interfaces as I write and at least one of them
- told me of plans to build an integrated ATM switch/router ("srouter"
- ?). These were firms that were primarily thinking in terms of IP over
- AAL5.
-
- Most telco firms go red in the face at hearing about AAL5 and freak
- out at routing -- they seemed to be very interested in complex
- bridging (e.g. between FR and ATM) instead of admitting that IP
- routing has a role to play. As someone else noted earlier, most telco
- folks erroneously believe that they understand datagram services,
- while most datagram-oriented folks realise that they don't understand
- circuit-oriented voice networks (telco networks) all that well.
-
- ATM switches _switch_ cells from an incoming VCI/VPI pair to a
- different outgoing VCI/VPI pair. Most ATM switches only _route_ at
- call-setup time (which is static routing). By contrast, IP and CLNP
- use dynamic routing and so each packet is routed individually and
- there is no call setup procedure.
-
-
- Ran
- atkinson@itd.nrl.navy.mil
- working for, but not speaking for, the Naval Research Laboratory
-