TWMO05008 WinHEC05

Digital Home Infrastructure
Gateways/Routers, Access Points and
Ethernet Bridge Product Requirements
Glenn Ward
Program Manager
Windows Networking
John Pennock
Program Manager
Windows eHome
Jim Barber
Program Manager
XBox Live
gward @
jpenn @
jbarber @
Session Outline
Windows Connect Now (WCN) program
Home network issues, Windows codenamed
“Longhorn” solutions
Setup and Configuration
Network Basics
QoS and Connectivity
Discovery and Control
Management and Diagnostics
Interoperability requirements per device class
Residential Gateway
Wireless AP / Bridge
Session Goals and Terminology
Today’s Goals
Better understanding of Longhorn technologies applicable to home
networking infrastructure
Show next steps to implement the necessary technologies in your
Terms used
Residential Gateway (RG)
Has WAN interface, routed, with modem
Typically Router, DHCP server, NAT
Often employs UPnP IGD
Wireless Access Point (WLAN AP)
‘Pure’ access point
Wired to wireless bridge
Hybrid Device
Integrated Gateway, Access Point (RG+WLAN AP)
Connectivity Foundation
Link Layer Topology
Extensible Diagnostics
WEP, WPA Identity and
Web Services
for Devices,
NAT Traversal,
Connectivity , QoS
802.3 RouterNetwork
802.11 Wireless
Windows Connect
and- Config
Device Association
Setting Context: The Digital Home Network
Problem: Secure Wireless
Network Setup is Too Difficult
Too much manual configuration
Service Set Identifier (SSID)
Wireless Equivalent Protection (WEP) key
Wi-Fi Protected Access (WPA) Pre-Shared Key (PSK)
No consistent way to do basic Access Point (AP)
Varied setup wizards
Most wireless networks are set up insecurely
Bottom line… Too many support calls and product
Solution Family: Windows Connect Now - Config
Currently Available
Flash Config
USB Cable
Younus Aftab
Program Manager
Windows Networking
Hybrid Device (RG+WLAN AP) and
Streaming Internet Camera
via Windows Connect Now-Config
WCN-Config Roadmap:
Web Services for Devices (WSD)
Device Profile for RG, WLAN AP currently
under development
Multiple Security methods
Rich discovery, control
Vendor Extensions – expose differentiating features
Built on industry standards defined in the Device
Profile for Web Services (DPWS)
For more information
fconfig @
Problem: Poor WLAN Streaming
Media (TV/Video) Experience (1 of 2)
Current bandwidth is not good enough for Media
Current popular home WLAN even at max rate have
marginal bandwidth – 802.11b ~ 6 Mbps and
802.11g ~ 22 Mbps
Streaming SD or HD Video is demanding
Standard Definition Television - 8 Mbps
High Definition Television – 19 Mbps
Shared Medium hurts bandwidth
A single 802.11b client can make an
802.11g client 80% inefficient
Problem: Poor WLAN Streaming
Media (TV/Video) Experience (2 of 2)
Wireless Interference destroys streaming media
Microwave Ovens, Baby monitors, Cordless phones
Buffers are usually only seconds long
Indoor walls/floors/obstructions are more important
than linear distance
Long-term reliability is not certified or tested
Is Your Media Stuck in Traffic?
802.11a & 802.11g
Media shares with other
Media has separate highway
Solution: Streaming Media Networks
Need an Upgrade!
Dual-band access points and bridges
802.11a for Media
802.11g for Internet/Data
Quality of Service prioritization and mapping
WMM, 802.1p, DSCP
Long-term reliability testing and stress
22 Mbps for 1 hour with <1% packet loss
Bandwidth improvements on 5 Ghz!
MIMO, 802.11n all on the 802.11a band
Current requirements (DfMCE 2004) for
Wireless Routers, APs, and Bridges
Wi-Fi Certified Dualband (802.11g & 802.11a)
Range: 60 ft indoor through 2 walls at max rate
Diversity Antennas (2)
Xbox Live Certified
15 Mbps for 30 min < 1% packet loss
New Requirements (DfMCE 2005) for
Wireless Routers, APs, and Bridges
Wi-Fi Certified Dualband (802.11g & 802.11a)
Range: 60 ft indoor through 2 walls at max rate
Diversity Antennas (2)
Xbox Live Certified
22 Mbps for 1 hour < 1% packet loss
Wi-Fi certified WMM and WPA-PSK
QoS tagging converted on all interfaces
(Wi-Fi to Ethernet to WAN to …)
Longhorn Premium (2006) Requirements
for Wireless Routers, APs, and Bridges
Wi-Fi Certified Dualband (802.11g & 802.11a)
802.11n on 5 Ghz instead of 802.11a when ratified
Range: 60 ft indoor through 2 walls at max rate
Diversity Antennas (2) or MIMO antenna system
Xbox Live Certified
22 Mbps for 2 hours < 1% packet loss
Wi-Fi certified WMM and WPA-PSK
QoS tagging converted on all interfaces
(Wi-Fi to Ethernet to WAN to …)
WCN-Config: Ethernet, Wi-Fi or FlashConfig
Link-layer Topology Discovery (LLTD)
Streaming Media Call to Action
Create the best ‘premium’ routers, APs, and
bridges that support streaming media
Streaming Media requires new and better
wireless gear
Follow the Logo Roadmap
DfMCE ’04, DfMCE ’05, LH Premium
Problem: NAT Breaks
End-To-End Network Connectivity
What NAT provides
Multiplex an IP address / share a network connection
NAT makes private network look like one PC
NAT blocks unsolicited traffic - provides boundary
What NAT Breaks
Private IP address in packet’s data section don’t get translated
Active FTP, H323, SIP, etc…
Blocks unsolicited traffic – bad for connectivity
MSN / Windows Messenger Sessions, Direct Play
Effects a broad range of Network Application
MSN Messenger accepting incoming file transfer from behind a
UPnP enabled NAT
Solution 1: UPnP Internet Gateway
Device (IGD) v1
UPnP IGD v1 standard improves app connectivity
Discover and Monitor NAT, public IP address
Create / remove port mappings
Longhorn Enhancements
Extended action support !
Byte Counters – required in Longhorn
WANCommonInterfaceConfig : GetTotalBytesSent and GetTotalBytesReceived
PnP-X Metadata: Required / Optional (opt. marked with *) but recommended:
deviceType, manufacturer, modelName, modelNumber, friendlyName, *hardwareID,
*compatibleID, *deviceCategory
IGD Support in Windows
Network Setup Wizard, Network Connections Folder, Network Explorer,
Function Discovery, PnP-X
Direct Play, Remote Assistance, Windows / MSN Messenger, RTC Stack, NAT
Traversal API on Windows XP 3rd Party Applications
UPnP IGD v1 standard widely adopted
Actiontec, Belkin, Broadcom, D-Link, Conexant, Fujitsu, Intel, Linksys, Microsoft,
Netgear, Sony, Thomson
IGD or WS Device Profile must be on by default!
Solution 2: Internet Protocol
Version 6 (IPv6)
Longhorn enables IPv6 by default!
Are your products ready?
Supplements IPv4; eliminates NAT problems
IPv6-aware RG: clients get public IPv6 address
RG support for IPv6 technologies
Local Area Network (LAN)
Router Advertisement/Neighbor Discovery
Wide Area Network (WAN)
For IPv6 enabled ISPs – prefix delegation
For IPv4 enabled ISPs – 6to4 tunneling (required transition
6to4 NAT Protocol Translation (NAT-PT) not recommended
IPv6: Product differentiator with Longhorn
P2P, .NET Applications, Web Services, Real Time Communication
Problem: Improper Router Behavior
Breaks Online Gaming Experience
Some routers exhibiting problematic behavior
NAT port assignment, filtering policies
Online gaming experience suffers
Test and Certification program created to help solve
Port policy, Port filtering definitions:
Port Policy: Minimal (UDP port per client),
Aggressive (UDP port per destination)
Filter rules
No Filtering (aka act as a “Full Cone” NAT)
Address Sensitive Filtering
Address & Port Sensitive Filtering
Avoid Symmetric NAT behavior – implement Cone
UPnP IGD or WS on by default -> most problems solved
Solution: Xbox Live TESTS
for Routers / Gateways
XBOX Live: Does the device allow clients to connect?
NAT type: How does the device perform NAT?
UPnP IGD: Is UPnP present and enabled by default?
UDP Test: Can packets from multiple IP addresses traverse
through device’s NAT implementation?
ICMP: Proper response to ICMP port-unreachable packets?
MTU: Support MTU size? (XBL max 1365)
Ports: Ability to download packets on ports 80 and 3074?
DHCP: Is the same IP received? Lease duration?
Session policy: Does port association stay open when only
“keep alive” traffic is present?
TCP FIN response: Is the socket association kept even after
internal client sends a TCP FIN?
Problem: Home Networks
are Hard to Diagnose
Users having difficulties setting up their network
Users don’t know or want to know how their networks are wired
We still have a way to go until networking is truly “plug and play”
Multiple points of failure
Hubs, Switches, Gateways, APs, Bridges, Modems, Cables
Requires technical skill set to fix
Tedious to check power, connectivity, link integrity to discover issues
Remote support effectiveness limited by lack of network connectivity
Difficult support experience
Takes up time and generates user frustration
Erodes customer satisfaction and trust
Expensive for vendors to support
Blame the issue on the wrong device; may result in product return!
Solution: Link Layer Topology
Discovery (LLTD)
Topology Discovery Protocol is a Longhorn
diagnostic technology
Creates baseline network image
Locates connectivity failures:
Unplugged cables, broken links; removed, powered off, or
malfunctioning devices
Removes tediousness of diagnostic process.
RG and WLAN AP can provide following data via
Topology Discovery
Discover collocated devices: (AP, Bridge, Modem)
Brand, model, firmware of RG
Summary: Technical Guidelines for
Residential Gateways
InBand (Ethernet, Wi-Fi) required
OutOfBand (FlashConfig, USB cable) optional
Discovery and Control
Discovery & control (UPnP or WSD) on by default
Populate required PnP-X metadata
Choose 1:
UPnPTM IGD 1.0 Standard, with Byte Counters enabled, or
Device Profile for Web Services (future)
Router Behavior
Xbox Live Certification
Proper NAT type, Port assignments, TCP Fin, etc.
Link-layer Topology Discovery (LLTD)
Include timed-probe extension
Quality of Service (QoS)
WAN – DSCP mapping
Support 802.1p tags on 802.3 interfaces
IPv6 6to4 Tunneling - recommended
Native Internet Protocol version 6 (IPv6)
WCN-Config Vendor Extensions
Summary: Technical Guidelines for
Wireless APs
Choice – one or more of InBand (Ethernet, Wi-Fi) or OutOfBand (FlashConfig, USB cable)
Discovery and Control
Discovery and control (UPnP or WSD) on by default
Populate required PnP-X metadata
Windows MCE requirements
Dualband (a+g) radios
Diversity Antennas (2) or MIMO antenna system
MIMO and 802.11n radios must be on 5 Ghz band
Reliability, throughput and range testing
22 Mbps for 2 hours < 1% packet loss , @ 60 ft.
Xbox Live Certification
Proper NAT type, Port assignments, TCP Fin, etc.
Wi-Fi certified WMM and WPA-PSK
Support Wi-Fi WMM for 802.11 products
In addition to 802.1p & WMM, support DSCP
Link Layer Topology Discovery (LLTD) with timed-probe extension
If integrated with RG…
see RG requirements
Native Internet Protocol version 6 (IPv6)
WCN-Config Vendor Extensions
Call to Action
RG, WLAN AP Design Guidelines Whitepaper!
CD or
Program and licensing information
Simple, unified licensing terms, easy to implement
Questions? Email fconfig @
Attend plugfests
Most recent plugfest was April 11th – 12th
Next plugfest: July 25th – 26th
Related Talks
TWMO05007 Wireless Configuration for Simple and
Secure Setup
TWMO05006 Network Topology: Connectivity
TWMO05005 Web Services for Devices: The .NET
Vision Realized
TWMO05011 qWave and Quality of Service
TWMO05004 Device and PC Integration with
Discovery, Plug and Play, Publication, and Network
TWMO05010 Implementations for Web Services
Additional Resources (Part 1)
Design Guidelines Whitepaper
Windows Connect Now - Configuration
Website contents: Whitepapers, requirements, etc.
Contact: fconfig @
UPnP IGDv1 standard
Support UPnP IGDv1
Certify your device
Follow these tips to ensure Windows Compatibility:
Additional Resources (Part 2)
Web Services and Web Services for Devices
Web Services:
Web Services Feedback Workshops:
Web Services Basics:
Devices Profile for Web Services:
WinHEC Longhorn Build!
DVD handed out at WinHEC
Additional Resources (Part 3)
WinHEC documentation CD
Network Connected Devices Technology Overview
PnP-X, Function Discovery, WSD
Implementer’s Guide
Readme/ How-To on Beta 1 PnP-X UI
Implement following IETF Drafts/RFCs
Neighbor discovery
Utilize “IPv6 Support in Internet Gateway Devices” Whitepaper
Additional Resources (Part 4)
Designed for Windows Media Center Logo
qWAVE API’s and QoS
XBox Live
Router FAQ:
Wi-Fi Alliance Certification
Details at:
Community Resources
Windows Hardware & Driver Central (WHDC)
Technical Communities
Non-Microsoft Community Sites
Microsoft Public Newsgroups
Technical Chats and Webcasts
Microsoft Blogs
© 2005 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

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