Denver Presentation Abstracts

The North American Network Operators Group (NANOG)

(More abstracts will be added often ... stay tuned.)

Deploying Inter-Domain Multicast Routing (Dino Farinacci, Cisco)
There are a number of issues with deploying scalable IP multicast across the Internet. We will present these issues and describe existing workarounds, as well as short-term and long-term solutions. We will discuss how sparse-mode PIM, MSDP, and MBGP can be used to address the issues in the short-term. We will describe how BGMP can address the issues for the long-term.


RED Analysis for Congested Network Core and Customer Egress (Bradley Reynolds, QualNet)
This presentation examines a current implementation of RED and describes how it performs under conditions of varying congestion. We have gathered data in the form of link utilization, link discards, link latency, and average queue lengths under a variety of configurations. The examined links vary from T1 to T3 speeds, which illustrate customer egress and network core, respectively. The study provides evidence of network changes due to RED configuration. It also provides suggested configuration guidelines, as well as a brief discussion of WRED/congestion avoidance futures.


The Ins and Outs of Layer 4+ Switching (Shirish Sataye, Alteon)
This session examines new Layer 4+ switching technology, how it works, why it's needed, and outlines technical deployment issues. Topics dicussed include: HTTP, DNS and other redirection operations, firewall and URL-based load balancing, distributed server load balancing and the integration of L4+ technology into existing ISP infrastructures.


Modem Wholesaling in Today's Marketplace: Vendor Approaches and Solutions (Marie Hattar, Nortel)
Modem wholesaling to ISPs and VPDNs is a growing market segment and presents its challenges in segmenting the service and yet managing the routing and IP address aggregation. This BOF provides a forum for discussing various approaches to this challenge. A solution is presented for providing the underlying infrastructure and architecture needed to build a wholesale network that is scalable and extensible as modem wholesaling service grows. Discussion topics include: 

Architectures
	POP versus Super POP
	NAS Densities
	Scalability & Extensibility
	Segmenting ISPs and VPDNs
	IP Pool Management
		NATs vs. Radius vs. IP Pools on the box
		IP Aggregation
Services Infrastructure
Port outsourcing; Usage Based; Users logged 
Services Offered for modem wholesaling
	Port Bursting or overflow capability
	Managing Port Guarantees
	Domain filtering
Billing
	AAA - what type of requirements; proxy cababilities
	Demonstrating SLA's
CNM
	Establishing comfort level with ISP or VPDN
	Demonstrating utilization and trends
Managing Filters and Traffic Shaping in Complex Networks
(Pete Kruckenberg, inQuo)
This BOF provides a forum for discussion of problems associated with managing hundreds of frequently changing access-lists and rate-limits, across multiple routers throughout a network, and by multiple policy managers.

Background: There has been a lot of discussion on the NANOG list and the inet-access list about the increasing need for better traffic management through traffic shaping and filters. Whether the reason is to reduce the effects of smurf attacks, control the use of services to prevent customers from putting a server up without authorization, or manage the priority and amount of bandwidth given to customers, today's networks are rapidly outgrowing traditional bandwidth management methods.

A static configuration of access-lists and rate-limits works when you are only making changes to a single router on an infrequent basis. These management techniques worked just fine when bandwidth could be managed in great swaths. With more customers having access to higher bandwidths through DSL, cable modems, and other technologies, network operators are having to build increasingly more complex bandwidth management policies that change more frequently and must be distributed throughout an entire network of routers.

Topics to be discussed in this BOF include: discussion of the problem, managing hundreds of frequently-changing access-lists and rate-limits, distributing a traffic-management policy throughout a network, debugging/diagnosing problems with the policies, and distributing policy management amongst multiple managers.

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