Our corporate network is ATM-based at the core. Routing is handled by
routers with ATM interfaces connected to the ATM switches. The
conenctions between the routers themselves are LANE connections. We
are currently preparing to deploy VoIP and Video over IP. Most of the
mechanisms I have seen to deploy QoS for IP traffic over ATM links
rely on the links being PVC that are statically setup. What technology
or protocol provides a good IP QoS solution for a network based on
LANE?

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Request for Question Clarification by studboy-ga on 09 Jan 2003 17:09 PST

Cisco 4500, 7200, 7500 routers (with IOS 12.1) as well Catalyst 5k/6k
modules/cards all support QoS--is this what you're looking for?

http://www.cisco.com/warp/public/121/qos_over_lane.pdf

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Request for Question Clarification by studboy-ga on 09 Jan 2003 17:10 PST

http://www.cisco.com/en/US/tech/tk39/tk42/technologies_configuration_example09186a0080093c9c.shtml

http://www.cisco.com/en/US/products/sw/iosswrel/ps1833/products_feature_guide09186a0080080fea.html

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Request for Question Clarification by studboy-ga on 09 Jan 2003 17:23 PST

BTW, LANEv2 specification only supports SVC connections (LANEv1
supports PVC). The LANEv2 specification also requires support for
point-to-multipoint connections.

Hi salah-ga, 
 
I have come across a whitepaper that i believe discusses a method for
achieving what you are looking for...here is the abstract from the
article:
 
"The purpose of this document is to describe how to configure LANE QoS
services on the P580/P882 ATM Uplink modules for P580 and P882
switches so that bandwidth can be guaranteed for VoIP calls between
two branch offices. The P580 and P882 switches prioritize traffic
(voice/data/video) between Ethernet and ATM networks (between Ethernet
and ATM interfaces of the switch) based on mapping of Layer 2 802.1p/Q
priority to ATM QoS sets1. In this configuration higher priority
voice, traffic is configured rt-VBR and lower priority data traffic is
configured as a UBR. This document does not address configuring the
Avaya™ M770 Multifunction ATM Switch for QoS; default behavior of any
ATM switch is to forward rt-VBR prior to UBR traffic. Validation was
performed, and configurations are included, for Avaya™ IP600 Internet
Protocol Communication Server and the DEFINITY OneŽ System."
 
All the of the Avaya products mentioned above are ATM switches, so I
would think that the same configuration techniques provided would
apply to your situation. Please let me know if you find the full text
of this article to be a suitable response to your question (it is
fairly detailed, about 10 pages with several diagrams).
 
Thanks, 
answerguru-ga

The congestion happens in the routers not in the ATM switches. What we
need is a router configuration that allows us to prioritize video and
voice traffic over routers ATM interfaces.