HELP NEEDED: Building a WAN with QoS guarantees.
"Kostas I. Karanassios - Network Manager" <Kostas.Karanassios@cti.gr> Tue, 14 February 1995 07:26 UTC
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From: "Kostas I. Karanassios - Network Manager" <Kostas.Karanassios@cti.gr>
Subject: HELP NEEDED: Building a WAN with QoS guarantees.
To: big-lan@suvm.acs.syr.edu, cisco@spot.colorado.edu, end2end-interest@isi.edu, ietf@CNRI.Reston.VA.US, rem-conf@es.net, xtp-relay@cs.concordia.edu
Cc: karank@leon.cti.gr, aronios@leon.cti.gr, behrakis@leon.cti.gr, balaoura@leon.cti.gr
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Dear Networkers, Apologies for the crossposting of this message to multiple newsgroups and e-mail lists. I would appreciate any kind of help (vendor/product info, references, experiences, etc) on the following problem: How to build a WAN with a broadcast/multicast functionality in order to connect a Server-station with N x Client-stations/PCs (N>=400), via point-to-point network connections (data rate >=19.2 Kbps), _______ Client-station1 (PC) +----------------+ ( ) / | Server-station |----------( WAN ) -- Client-station2 (PC) +----------------+ ( ) \ . ------- \ . . Client-stationN (PC) so that: the broadcast/multicast capability of the WAN will GUARANTEE fairness of RELIABLE packet delivery (periodic info updates from Server to Client stations) with less than 0.1 sec latency between packet delivery to first (1) and last (N) Client station. Currently, I am thinking of two possible approaches: Approach 1: ----------- Implement the WAN through an appropriate X.25 switch able to enforce the special QoS guarantee mentioned above. Questions to be answered: 1. Which X.25 vendors/products (switches,PADs, etc) support the above broadcast capability ? 2. Is it possible (any products?) to also run IP over the above WAN with acceptable overhead so that the special QoS guarantee mentioned above is still enforced ? Approach 2: ----------- Implement the WAN as an IP internetwork - with Multicast extensions - able to enforce the special QoS guarantee mentioned above. Questions to be answered: 1. How RELIABLE delivery of packets can be enforced on the above WAN (using UDP/IP-Multicast or other) ? 2. Any IP products (with Multicast extensions) able to enforce QoS guarantees (especially the one mentioned above)? Any kind of help will be much appreciated. Thank you in advance, Kostas Karanassios Network Manager P.S. Please respond directly to me. Thank you. ------------------------------------------------------------------------------ Computer Technology Institute (CTI) Tel : +30 61 992.061, 994.317-8 Kolokotroni 3, 26221 Patras, Greece Fax : +30 61 993.973, 222.086 P.O. Box 1122, 26110 Patras, Greece e-mail: Kostas.Karanassios@cti.gr ------------------------------------------------------------------------------
- HELP NEEDED: Building a WAN with QoS guarantees. Kostas I. Karanassios - Network Manager