Kaushal Mehta (Microsoft Corporation)James Ooi (Lync MVP)

Understanding Lync 2013 Mobile Media Flows

CLNT402

Session Objectives And TakeawaysObjectivesIsolating the scenario for troubleshooting Understanding the troubleshooting methodology and thought processes involvedRecognize the limitations with media setupTroubleshoot faster

TakeawaysMobile client media initialization ICE negotiation with mobile clientsMobile end user experienceMedia flow for calls going to PSTN Media flow for calls going to UM OnlineMedia flow for calls going to a remote user

AgendaNew mobility related media flags introduced in 2013“What happens when” scenariosScenario # 1 User cannot place a voice callScenario # 2 User cannot connect an audio callScenario # 3 Wife complaining video call connecting with audio onlyScenario # 4 Mobile user successfully calling a PSTN number Scenario # 5 Mobile user calling another Lync user, call goes to UM OnlineScenario # 6 Mobile user calling a Remote Lync UserLimitations with 2013 Mobility MediaQ&A

Scope400 levelBasic SIP/SDP protocol understandingBasic ICE candidates understandingLadder diagramsLogs debuggingGoal is faster troubleshooting

MICROSOFT CONFIDENTIAL – INTERNAL ONLY

New Media Flags

New AV mobility flags in 2013ServerEnableIPAudioVideo RequireWIFIForIPAudio RequireWIFIForIPVideo

New flags in 2013Mobile ClientRequire Wi-Fi for VoIPRequire Wi-Fi for Video

Mapping…..

RequireWIFIForIPAudio

RequireWIFIForIPVideo

Controlling these settings….

RequireWIFIForIPAudio RequireWIFIForIPVideo

false false

Controlling these settings….

RequireWIFIForIPAudio RequireWIFIForIPVideo

false true

Controlling these settings….

RequireWIFIForIPAudio RequireWIFIForIPVideo

true false

Controlling these settings….

RequireWIFIForIPAudio RequireWIFIForIPVideo

true true

Media connection priorityWi-FiCellular data (3G/4G data)Fallback is Call Via Work (CVW)

MICROSOFT CONFIDENTIAL – INTERNAL ONLY

“What happens when” Scenarios

User roams between networks

CNetworkMonitor.cpp/85:Network Monitor Information: AirPlane Mode: Off, NetworkConnectionAvailable = Available, Network Connection: WiFi

CNetworkMonitor.cpp/85:Network Monitor Information: AirPlane Mode: Off, NetworkConnectionAvailable = Available, Network Connection: CellularDataNetwork

Wi-Fi + Cellular Data Cellular Data

CNetworkMonitor.cpp/85:Network Monitor Information: AirPlane Mode: On, NetworkConnectionAvailable = Unavailable, Network Connection: None

No Internet

User roams out of Wi-Fi, mid-call

CNetworkMonitor.cpp/85:Network Monitor Information: AirPlane Mode: Off, NetworkConnectionAvailable = Available, Network Connection: WiFi

CNetworkMonitor.cpp/85:Network Monitor Information: AirPlane Mode: Off, NetworkConnectionAvailable = Available, Network Connection: CellularDataNetwork

Wi-Fi + Cellular Data Cellular Data

Users switch between Wi-Fi hotspots

MICROSOFT CONFIDENTIAL – INTERNAL ONLY

Scenario 1

Scenario 1

SymptomUser cannot place a voice call

Scenario AnalysisHappens with both p2p voice and PSTN callsAll mobile platformsSame user can place calls from desktopI could repro from my WP8 deviceThe error notification comes right away (no ringback)Both; internal and external users

Scenario 1 : User cannot place a voice callMobile UCWA FE Edge/MS/LyncDesktop/UCWA

Scenario 1 : User cannot place a voice callLogs Analysis

Scenario 1 : User cannot place a voice callMobile UCWA FE Edge/MS/LyncDesktop/UCWA

Scenario 1 : User cannot place a voice callCAlertReporter.cpp/64:Alert received! Category 6, Type 700, level 0, error E_VoiceGenericError (E3-11-21), context '', hasAction=false

..\..\..\ucmp\applicationLayer\objectModel\private\CUcmpAudioVideoModality.cpp/748:CUcmpAudioVideoModality::initializeMediaCall() failed! Error E_Unexpected (E0-0-11)

..\..\..\ucmp\applicationLayer\objectModel\private\CUcmpAudioVideoModality.cpp/337:IMediaPlatformWrapper::initiateMediaCall() failed with error E_Unexpected (E0-0-11)

Scenario 1 : User cannot place a voice call

MICROSOFT CONFIDENTIAL – INTERNAL ONLY

Scenario 2

Scenario 2

SymptomUser cannot connect an audio call

Scenario AnalysisOnly happens when calling the Polycom HDX8000All mobile platformsSame user can connect calls from desktopI could repro from my WP8 deviceThe call remains in “connecting…” stateFederation scenarioFederation scenario but calling to other users in that domain works

Scenario 2 : User cannot connect an audio call Mobile UCWA FE Edge Polycom’s Edge HDX8000

Scenario 2 : User cannot connect an audio call Mobile client log analysisDemo

Scenario 2 : User cannot connect an audio call Mobile UCWA FE Edge Polycom’s Edge HDX8000

Scenario 2 : User cannot connect an audio call Edge Server log analysisDemo (outgoing INVITE)

Scenario 2 : User cannot connect an audio call

NAT for Wi-Fi

Lync Edge (TURN Server)

Wi-Fi 3G

NAT from cellular data

Lync Edge (TURN Server)

10.232.128.223

166.137.94.218

209.216.6.126

Scenario 2 : User cannot connect an audio call Edge Server log analysisDemo (incoming 200OK)

Scenario 2 : User cannot connect an audio call

NAT for Wi-Fi

Lync Edge (TURN Server)

Wi-Fi 10.232.128.223

166.137.94.218

209.216.6.126 Polycom HDX

172.31.37.50

After 200OK from HDX

Scenario 2 : User cannot connect an audio call Lync Desktop Edge FE Edge Polycom’s Edge HDX8000

Same user can connect from Lync desktop

Scenario 2 : User cannot connect an audio call Same user can connect from Lync desktopDemo (outgoing INVITE)

Scenario 2 : User cannot connect an audio call

NAT for LAN

Lync Edge (TURN Server)

LAN

12.236.71.146

209.216.6.126

10.1.206.79

Scenario 2 : User cannot connect an audio call Edge Server log analysisDemo (incoming 200OK)

Scenario 2 : User cannot connect an audio call

NAT for LAN

Lync Edge (TURN Server)

LAN

12.236.71.146

209.216.6.126

10.1.206.79

Polycom HDX

Host 172.31.37.50

After 200OK from HDX

Relay 140.242.65.13

X

Scenario 2 : User cannot connect an audio call Edge Server log analysisDemo (final INVITE and 200OK)

Scenario 2 : User cannot connect an audio call Comparison- Both INVITEs are similar in terms of candidates- Different codecs offered but there is no 415 or 488 SIP response

code- Mobile client doesn’t offer

- Content-Disposition: session; handling=optional; ms-proxy-2007fallback

Summary- Polycom and PG looking into this for Video interop

MICROSOFT CONFIDENTIAL – INTERNAL ONLY

Scenario 3

Scenario 3

SymptomWife complaining video call connecting with audio only

Scenario AnalysisWife tells me video call got connected with audio onlyResponse: because there was no wi-fi as per notificationWife again tells me video call got connected with audio onlyResponse: not really sure, there wasn’t any notification

Scenario 3 : Video call connecting as audio only call

Scenario 3 : Video call connecting as audio only call Lync Desktop Edge FE UCWA Lync Mobile

SIPSIP

HTTPS

Scenario 3 : Video call connecting as audio only call

Edge Server log analysisDemo (for signaling)

Scenario 3 : Video call connecting as audio only call Signaling

Lync Desktop Edge FE UCWA Lync Mobile

SIPSIP

HTTPS

PNCH/WP PNS

SIP MESSAGE

SIP MESSAGE

WPNotification

200 OK200 OK

200 OK

183

Scenario 3 : Video call connecting as audio only call

Edge Server log analysisDemo (for media)

Scenario 3 : Video call connecting as audio only call Media

Lync Desktop Edge FE UCWA Lync Mobile PNCH/WP PNS

NAT Cellular NAT

MICROSOFT CONFIDENTIAL – INTERNAL ONLY

Scenario 4

Scenario 4

Call FlowMobile user successfully calling a PSTN number

Scenario 4 Mobile user calling a PSTN Number

Signaling

Lync Mobile UCWA FE MediationSIP Trunk/PSTN

HTTPS

INVITE

1-800United1

200 OK / CONNECT

200 OK

HTTPS

INVITESIP/TDM

183/ALERT

183183

HTTPS

200 OK

Scenario 4 Mobile user calling a PSTN Number

Logs demo (Signaling & Media)Lync server logs and mediation server network capture

Scenario 4 Mobile user calling a PSTN Number

12.236.71.146

209.216.6.126

10.1.206.79

Just before INVITE from mobile

Wi-Fi

NAT – Server Reflex

Edge Server – Relay (TURN)

10.0.1.73

Mediation Server

10.0.0.55

SIP Trunk

Initial INVITE from mobile183 from Mediation

Scenario 4 Mobile user calling a PSTN Number

12.236.71.146

209.216.6.126

10.1.206.79 Wi-Fi

NAT – Server Reflex

Edge Server – Relay (TURN)

External NIC 10.0.1.73

Mediation Server

Internal NIC 10.0.0.55

SIP Trunk

External NIC 10.0.1.254

NAT

Internal NIC 10.0.0.89Media Flow

MICROSOFT CONFIDENTIAL – INTERNAL ONLY

Scenario 5

Scenario 5

Call FlowMobile user calling another Lync user, call goes to UM Online

Scenario 5 Mobile user calling another Lync user, call goes to UM OnlineSignaling

Lync Mobile UCWA FE Edge Remote Lync User

HTTPS

INVITE

UM Online

INVITE

183183

HTTPS

CANCELCANCEL

INVITEINVITE

Scenario 5 Mobile user calling another Lync user, call goes to UM Online

Logs demo (Signaling & Media)Lync server and Edge server logs

Scenario 5 Mobile user calling another Lync user, call goes to UM Online

70.102.70.79

209.216.6.126

10.0.1.63

Just before INVITE from mobile

Wi-Fi

NAT – Server Reflex

Mobile User’s Edge Server – Relay (TURN)

Initial INVITE from mobile

183 from Lync User

LAN10.0.4.251

NAT – Server Reflex70.102.70.79

CANCEL from FE

Scenario 5 Mobile user calling another Lync user, call goes to UM Online

70.102.70.79

209.216.6.126

10.255.97.41 Wi-Fi

NAT – Server Reflex

Mobile User’s Edge Server – Relay (TURN)

Continues to hear ringback

EDGE (SIP)

10.0.1.63

207.46.5.80

NAT – Server Reflex10.27.46.15

UM Online Office 365

LAN

200 OK from UM Online

Scenario 5 Mobile user calling another Lync user, call goes to UM Online

70.102.70.79

209.216.6.126

10.255.97.41 Wi-Fi

NAT – Server Reflex

Mobile User’s Edge Server – Relay (TURN)

Final media candidates

EDGE (SIP)

10.0.1.63

207.46.5.80

NAT – Server Reflex10.27.46.15

UM Online Office 365

LAN

X

X

MICROSOFT CONFIDENTIAL – INTERNAL ONLY

Scenario 6

Scenario 6

ScenarioProof-of-Concept Evaluating Lync MobileWireless Network on a different VLANRestricted Access Policies & Routing to the Production NetworkUsing Split Brain DNSUnable to establish calls with a Remote Lync Client outside of the Corporate NetworkDirect Peer-to-Peer between the Corporate Network & Public Network is prohibited between Endpoint devices

Scenario 6: Mobile user calling a Remote Lync ClientSignaling

Lync Mobile UCWA FE Access EdgeRemote Lync Client

Scenario 6

Scenario 6

AnalysisMobile Device at the wireless VLAN attempt to route the traffic via the Access Edge ServerAccess Edge indicates that the Media Stream couldn’t be established after an INVITE is being made

Scenario 6

AnalysisLync Client Log UCCP Log

Scenario 6

AnalysisLync Mobile

\cucmpaudiovideomodality.cpp/5107:CUcmpAudioVideoModality::startNegotiation : IMediaCallWrapper::startNegotiation returned E_GetMediaSdpFailed (E3-7-7), not setting negotiationState02-07 01:22:50.222 20745 20745 I LYNC : INFO APPLICATION .

\cucmpaudiovideomodality.cpp/5039:CUcmpAudioVideoModality::prepareOffersForOutgoingCall() failed with E_SdpNoMedia. Aborting the call

\cucmpaudiovideomodality.cpp/1240:CUcmpAudioVideoModality::stop()

\cucmpaudiovideomodality.cpp/7323:CUcmpAudioVideoModality::stopAudioInternal() called. callTerminationReason = FailedStartAudioStream

MICROSOFT CONFIDENTIAL – INTERNAL ONLY

Limitations with mobile media

Limitations with mobile media

User is mobile as against being in a office (Lync Desktop scenario)Changing networks

LFE Item 2126

In Review: Session Objectives And TakeawaysObjectivesIsolating the scenario for troubleshooting Understanding the troubleshooting methodology and thought processes involvedRecognize the limitations with media setupTroubleshoot faster

TakeawaysScenario 1: Mobile client media initialization and association with media port rangesScenario 2: ICE negotiation with mobile clientsScenario 3: How PNCH may affect end user experienceScenario 4: Troubleshoot media flow via NAT’ed EdgeScenario 5: Troubleshoot media flow for calls going to UM OnlineScenario 6: Troubleshoot media flow between Mobile Client & the remote Lync Client

Monday, February 17th

Exhibit Hall Hours 6:00pm – 8:00pm

6:00pm – 8:00pm Welcome Reception

Tuesday, February 18th

Exhibit Hall Hours 8:00am – 9:00am (Breakfast), 10:30am – 5:00pm

8:00am – 9:00am Breakfast (Exhibit Hall) 9:00am –10:30am General Session10:30am – 5:00pm Expo Hall Hours11:00am – 12:15pm Sessions & Hands-on Labs12:15pm – 2:00pm Lunch2:00pm – 5:00pm Sessions & Hands-on Labs5:00pm – 7:00pm Ask the Experts

Wednesday, February 19th

Exhibit Hall Hours 10:30am – 4:30pm

7:30am – 8:30am Breakfast8:30am – 11:30am Sessions & Hands-on Labs10:30am – 4:30pm Expo Hall Hours11:30am – 1:00pm Lunch1:00pm – 5:45pm Sessions & Hands-on Labs6:30pm – 9:30pm Attendee Party

Thursday, February 20th

Exhibit Hall Hours 9:00am – 12:00pm

8:00am – 9:00am Breakfast9:00am – 12:00pm Expo Hall Hours9:00am – 12:15pm Sessions & Hands-on Labs12:15pm – 1:30pm Lunch and Departures

Ask the ExpertsLocation: Meal Hall located on Level 1 in Pinyon Ballroom 4-8 Tuesday, February 18

TABLE TOPICS:Best Practices, Business Value, Clients & Mobility, Lync Meetings and Video, Lync Online, Networking, Platform, Server & Manageability, Voice, Lync Feedback Sessions

Meet face-to-face with the foremost experts in the Lync field and ask them the questions that have you stumped.

Location: Breakout rooms located on Level 1 5:00pm-7:00pm

GROUPS INCLUDE:Manageability – Pinyon 2Meetings & Web Experiences – Bluethorn 4-6Mobility – Bluethorn 7-9Presence & Chat – Pinyon 1Voice & Video – Bluethorn 1-3

Come participate in targeted Feedback Sessions to hear about the high-priority feature asks and help us improve the next release!

Lync Feedback

These sessions are meant to be informational, providing an understanding of the workload and conversational, to discuss your user scenarios and desired improvements.

Birds of a FeatherBirds of a Feather flock together! Join daily breakfast discussions of relevant topics by sitting in the separately designated areas of the Meal Hall. Seating will be sorted in a different way for each Birds of a Feather breakfast:Wednesday, February 19:Where are you from? Asia/Pacific, Eastern & Central Europe, Latin America, Middle East & Africa, US (West, Central & East) and Canada, Western Europe

Thursday, February 20:What is your interest?Best Practices, Business Value, Clients & Mobility, Lync Meetings and Video, Lync Online, Networking, Platform, Server & Manageability, Voice

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