© 2011 Cisco and/or its affiliates. All rights reserved. Cisco Public BRKEWN-2000 1 BRKEWN-2000 Larry Ross WLAN Design and Deployment of Rich Media Networks Technical Marketing Engineer
Nov 28, 2014
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 1
BRKEWN-2000
Larry Ross
WLAN Design and
Deployment of
Rich Media Networks
Technical Marketing Engineer
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 2
Agenda
AP3500Wi-Fi Channel Bandwidth Management for
Multiple Application Types
Configure for Capacity – Voice & Video
Bandwidth for Call Admission Control
Configure for best Channel Utilization – Data
Rates, Legacy Beam Forming & Band Select
802.11 Channel Design for VDI
Bringing 802.11n Enhancements together
for a better Data, Voice, and Video WLAN
WLAN QoS for Voice & Video
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 3
Wi-Fi Channel Bandwidth
Management for
Multiple Application Types
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 4
Bandwidth
QualityScale
Cisco Media Ready Wireless LAN
VideoStream
ClientLink
End-to-End QoS
Call Admission
Control
Spectrum
Analysis
802.11n
BandSelect &
LoadBalancing
Cisco
Media
Ready
WLAN
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 5
1 6 11
1997 Data Rates
1 & 2 Mbps
Throughput
about
0.8 Mbps
Three 5 Pound Bags
If your 5 pound bag is full of 2Mbps traffic how are you going to fit in 300 Mbps
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 6
The Radio Frequency Protocols in Those Three
2.4GHz Bags From Just Your Smart Phone
•4 different Wi-Fi protocols
802.11, 802.11b, 802.11g, and 802.11n
•3 different technologies
802.11 Wi-Fi , Wi-Fi Direct, and Bluetooth(BT)
•3 different BT protocols and soon to be 4
1.2, 2.0 plus EDR, 3.0 plus HS, and 4.0
Train Wreck Waiting to Happen
• BT specification information is in the addendum
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 7
Continued
•Doing 3 different basic applications:
• Voice, Video, and Data from the same device
•How many different communication protocols are used in each of those applications?
•How many of those applications are a direct port from Ethernet which does not have roaming?
•When layer 2 changes, is the application still going to work?
Train Wreck Waiting to Happen
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 8
The Wreck Is Here
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 9
•Do you consider what your Bluetooth radios will do to the performance of the Wi-Fi radio of the colleague two cubes away from you?
•The manufacturers and the specifications claim co-existence:
•That is between that client‟s Wi-Fi radio and it‟s BT radio and the paired BT radio. Examples are BT headset, mouse and keyboard.
•What happens during pairing?
•What happens to the bandwidth of your neighbors?
•What happens with BT 3.0?
• You build a secure WLAN and then put all near data over an insecure BT PERSONAL AREA NETWORK (PAN)
Bluetooth Client Device Radios
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 10
BLUETOOTH PAIRING MODE
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 11
• When using a headset, the Wi-Fi voice packets will be replicated by the BT radio at much slower BT data rates on the 2.4GHz channels used by Wi-Fi.
• In multichannel 2.4GHz Wlan, that means those slow BT packets will affect all Wi-Fi channels.
• A BT chipset may be built for the 3.0 specification, but the BT driver may be using a earlier device code.
• The previous slide shows early BT specification behavior.
Bluetooth Continued
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 12
Recommendations:
• 11n Packet Aggregation Configuration for Dense Video/Voice
• Manage out all possible interferers
• Manage out all possible low data rates
• Use MIMO antenna technology to its fullest extent
• Use Legacy Client Link and Future 802.11n Client Link
• Use Band Select
• Use Call Admission Control
• Use Multicast Direct
• Enable Windows XP and Windows 7 QoS
Bandwidth Management
With “Video Calling”: Now More Important Than Ever
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 13
One Cius with Three Different Application
Packet Types
• 3 Wi-Fi Media Access Categories used Simultaneously on One WLAN SSID by the Cius
• The WLAN is Configured for Voice
The Voice AC Sent 30413 G722 Codec Packets
The Video AC Sent 18647 Dynamic RTP Packets
The Best Effort AC Sent 1220 ICMP Ping Reply Packets
This was Captured from the AP CLI -> Show Cont D1
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 14
Recommended Enterprise
A-MPDU and A-MSDU Settings
The Current Default Settings are not
Optimal for Densely Deployed WLANs
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 15
Recommended MPDU & MSDU Settings
Default
• A-MPDU
User Priority 0, 4, 5 = Enabled
User Priority 1, 2, 3, 6, 7 = Disabled
• A-MSDU
User Priority 0, 1, 2, 3, 4, 5 = Enabled
User Priority 6, 7 = Disabled
Recommended
• A-MPDU
User Priority 0, 3, 4, 5 = Enabled
User Priority 1, 2, 6, 7 = Disabled
• A-MSDU
User Priority 1, 2 = Enabled
User Priority 0, 3, 4, 5, 6, 7 = Disabled
The 7.0.116.0 Default A-MPDU and A-MSDU
Check for Recommended Changes in each Code Release
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 16
A-MPDU & A-MSDU WLC Configuration
• Recommended for WLAN Network with a dense Deployment of Video Call Capable Wi-Fi Phones
Including: Skype, Face Time, Cisco Cius & Social Media
These configurations are on the CLI only:
• Enable A-MPDU on UP 4,5
• Disable A-MSDU on 4,5,6 priorities.
• Syntax -> config 802.11a 11nsupport a-mpdu tx priority <0-7> enable/disable
• Examples ->
config 802.11a 11nsupport a-mpdu tx priority 5 enable
config 802.11a 11nsupport a-msdu tx priority 4 disable
• 11n Packet Aggregation Configuration for Dense Video/Voice
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 17
2.4GHz Cius 720p Video Call to Cius Video
Call without CLI Changes
30%
Packet
Loss
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 18
• Top half of Wireshark Screen Shoot
2.4GHz 720p Video Call RTP Analysis
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 19
• Wireshark computes a 108% Packet Loss in this stream.
2.4GHz 720p Video Call RTP Analysis (Continued)
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 20
Video Call After A-MSDU and A-MPDU Changes
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 21
Configure for Capacity – Voice & Video Bandwidth for Call Admission Control
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 22
Xoom, iPad, Galaxy Tab, Droid Charge, Cius
& iPhone
Different Devices with Different Levels of Wi-Fi and QoS support
So, they Don’t ALL Behave the Same on Your Enterprise Network!
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 23
Thomas Edison’s Telephonescope
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 24
However They Can Share the Same WLAN
• Create the WLAN for both 2.4GHz and 5GHz Wi-Fi Bands
• Let the Device find the Best Band and Enable Cisco Band Select to Encourage the other devices to use 5GHz
• Use a Security Type that is Common to All
• Don‟t Expect
• Them to Roam the Same on Channel Changes
• Roaming Ultimately is Done at the Client Wi-Fi Driver Level
• QoS Markings for Similar Applications Maybe Different at the Wi-Fi
• Battery Saving Sleep Modes Will Differ
• Best Practice for Smart Phones is Routinely Check for Firmware Updates
• Apple Added Voice and Video 802.11e QoS in 4.3
• Wi-Fi Radio Power and Antenna Differ
Find the Common Ground
Note: The Above is also True of Laptops
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 25
802.11e CAC for Video Calls
TSPEC CAC and SIP CAC Share the Same Bandwidth Reservation. Video has a BW Reservation
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 26
Configure for best Channel Utilization – Data Rates, Legacy Beam Forming & Band Select
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 27
• Do you need 1997?
• Do you need CAT3? 10GigCat6 Ethernet Cable?
• Do you plug 10Mbps Ethernet NICs into 1 GIG switch ports?
• Do you need 1997?
That is the first year of Wi-Fi. 1 & 2Mbps
• 1999 is 802.11b Wi-Fi and 5.5 & 11Mbps
Data Rates vs. Channel Utilization
Is it time to re-cycle your
WLAN Bandwidth?
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 28
• The denser the deployment of APs, the higher the first required data rate (recommendation from Cisco)
• If the AP deployment is not dense, the lower data rates may be necessary to provide coverage
• With the G.711 codec and the overhead of the 802.11 protocol, the cell throughput does not increase at data rates above 24Mbps
The Data Rate Influence on CAC Bandwidth
Tuned 802.11b/g Data Rates:
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 29
Site Planning – Based on Application
ABG
ABG
ABG
ABG
•Data
• Rate & Range
•Voice
• Rate & User Density
•Video
• Rate & User Density
•VDI
• Rate & Range
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 30
802.11 Channel Design for VDI
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 31
•Does 792x Work Well?
•What is Current Channel Overlap?
•What is the Current Range?
•What are the Current Data Rates?
•Are the Cells Built on -67dBm Edge?
•What is the Wi-Fi Channel Utilization CU%? -Throughput Does Not Increase once the CU Reaches 33%.
What Is a Well Designed Coverage Plan?
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 32
Ideal Environment for 802.11b/g/a/n Phone Clients
the Cell Edge Recommendation Is -67dBm.
• A typical deployment showing a 10–15% overlap from each of the adjoining cells. Provides almost complete redundancy throughout the cell.
• With 5GHz there are enough channels available there should be no need to have a co-channel design, but this would the recommendation for dense 5GHzdeployments and for all 2.4GHz deployments
• The same design principle applies for deployments using 802.11n APs.
The separation of
same channel cells
should be: 19 dB
-67dBm -86dBm
The RADIUS
of the cell
should be:
–67 dBm
Channel 36
Channel 44
Channel 149
Channel 1
Channel 6
Channel 11
or
This example shows just 3 of the 5GHz 11a or bounded 11n channels.
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 33
How to Measure and What to Measure 1 of 3
• The process is the same for 11b/g, 11a, 11n 20Mhz or 40Mhz wide.
• More and more, the Design is about High Density Capacity.
• How users and how calls are going to be needed in a certain coverage area.
• Call Capacity Max is 26 Audio Calls per Wi-Fi Channel.
• Co-Channel Interference, non-Wi-Fi Interference, Data, Video and CAC Configurations are going to reduce the MAX number of Calls
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 34
• Capacity by Coverage Area becomes a DATA RATE and TRANSMIT POWER Configuration Issue.
• Faster Data Rates = Smaller Cells
• Lower Transmit Powers = Smaller Cells
• Loss the Slow Data Rates and High TX Powers then the Cells will be Smaller.
• Smaller Cells = More Cells = More Calls in a Coverage Area
How to Measure and What to Measure 2 of 3
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 35
• TEST
Set to “Disabled” all data rates except the estimated best fit data rate
Use the Actual Clients that the User is going to use
Do Live Calls with those Clients
Check the RSSI Reading Off the AP
Find the -67 dBm range by slowly moving away from the AP
Now select a client radio to be the survey benchmark radio
• Disable the Slow Data Rates and abandon High TX Powers -> the Cells will be Smaller
• Smaller Cells = More Cells = More Calls in a Coverage Area
How to Measure and What to Measure 3 of 3
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 36
• Pick Your Most Used Client or The Client That Your WLAN Network was Designed Around.
• Find an Area in Your Facility Where That Device‟s Uplink is at -67dBm.
• Move Your New Clients to that Area.
• Then Measure the Uplink dBm Value of Those Clients.
Measure the -67dBm Cell Size to the
Clients
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 37
Measure the Uplink at -67dBm on the AP
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 38
• Divide by application
• Hardwired client capabilities
• QoS capabilities
• Coverage requirements
• Capacity requirements
• How many SSIDs?
SSID Planning Client/Application Types
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 39
VXI -
Cisco Virtualization
Experience
Infrastructure
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 40
Desktop Virtualization:
Nomenclature
Desktop VirtualizationSuite of Technologies
Desktop Streaming
Application Virtualization
Terminal Services
VDIVirtual Desktop
Infrastructure
Industry Terms for VDI:Gartner: “Hosted Virtual
Desktop”
IDC: “Centralized Virtual
Desktop”
Cisco
VXI
End-to-End
Architecture
Supporting
Rich Media
/UC
Enhanced
Security
Application
Acceleration
POE /
Energy Wise
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 41
Cisco’s Vision for VXI
Borderless
NetworksCollaboration
Data Center /
Virtualization
“Deliver a superior collaboration and rich media user experience
with best in class ROI in a fully integrated, open and validated
desktop virtualization solution”
VXI Virtual
Workspace
Media Rich Experience
TCO / ROI
Security
Integrated System
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 42
Cius – A VXI Client Device
• Cius unit requires call control support from CUCM 8.5.
• 802.11a/b/g/n Wi-Fi for On/Off Campus Mobility
Single Stream
• Seamless transition wired to wireless
• Battery – 8 hours (normal usage)
• Docking stations at desk
• Future: 3G/4G data services
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 43
Bringing 802.11n Enhancements
Together for a Better Data, Voice,
and Video WLAN
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 44
MIMO – MIMO – MIMO
• AP3500 – 802.11n with separate Spectrum Intelligence radios
• AP3500i – Internal MIMO Antennas
• AP3500e – External MIMO Antenna support
• http://www.cisco.com/en/US/prod/collateral/wireless/ps5678/ps10981/data_sheet_c78-594630.html
• CleanAir Technology
• Simplify wireless operations with:
• Automatic interference mitigation for better reliability and performance
• Remote troubleshooting for fast problem resolution and less downtime
• Robust security with non-Wi-Fi detection for off-channel rogues
• Policy enforcement with customizable alerts to prohibit devices that interfere with the network
• http://www.cisco.com/en/US/solutions/collateral/ns340/ns394/ns348/ns1070/aag_c22-594304.pdf
• AP1260 – 802.11n External MIMO Antenna support
• Same as the AP3500e but without Spectrum Intelligence radio
• http://www.cisco.com/en/US/prod/collateral/wireless/ps5678/ps10980/data_sheet_c78-593663.html
• The AP3500s and AP1260 have the same housing and PoE requirements as the AP1140
Access Points
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 45
• For VoIP Snooping and VoIP Reporting enable this option.
WLAN – Advanced Settings
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 46
Access Points -> Radio -> 802.11a/n -> DetailThe Statistics Provide WLAN Performance Info – 1 of 3
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 47
Access Points -> Radio -> 802.11a/n -> Detail
Profile Information on Noise and Channel Load – 2 of 3
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 48
Access Points -> Radio -> 802.11a/n -> Detail
Profile Information on Noise and Channel Load – 3 of 3
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 49
Access Points -> Radio -> 802.11b/g/n -> Detail
CleanAir Info From the Access Point – 1 of 2
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 50
Access Points -> Radio -> 802.11b/g/n -> Detail
CleanAir Info From the Access Point – 2 of 2
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 51
WLAN QoS for Voice & Video
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 52
SIP Based QoS (WLC code stream 6.0)
• Intercept and snoop SIP traffic (AP: Upstream, WLC: downstream) to determine voice session and set QoS
• RFC 3261 compliant client
SIP Based CAC (WLC code stream 7.0)
Adding to the SIP Based QoS of Release 6
• Enable the network to roam voice session between APs based on available bandwidth
• Feature is applicable to SIP phone w/o TSPEC.
• Bandwidth parameters are configured manually on per session bases
The WLC has 1 Media Time Parameter
The Wi-Fi has 1 Channel Utilization Value for the AP‟s Radio
Wi-Fi 802.11e CAC & SIP CAC
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 53
A Trace of the Beacon for the AP Shows MT
Channel Utilization & Available Admission Capacity
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 54
Cius WLAN Voice & Video Packet Count
Percentage wise, by packet count, the Voice and Video are fairly similar.
But the Video packets are nearly 4 times bigger. Therefore taking up
substantially more bandwidth, if assigned the same QoS as Voice packets.
50.9%
512-1023
4.3%
1024-2048
10.0%
2048-2346
5.3%
256-511
29.0%
128-255
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 55
Cius WLAN Voice & Video Byte Count
Percentage wise, by packet size, the Voice used 20% of the bytes and
Video used 77.7% of the bytes, taking up substantially more bandwidth.
The Video packets of the 9971‟s ranged from 110 to 939 bytes.
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 56
Eleven Cius Videos on One 5GHz Channel
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 57
• Client Voice packet has a 802.11 UP = 6
• Client Video packet has a 802.11 UP = 5
Cius Decode
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 58
• Client Voice packet has a 802.11 UP = 0 with a DSCP = EF
• Client Video packet has a 802.11 UP = 0 with a DSCP = AF
IP Communicator
in SIP Mode &
Without Windows
QoS Enabled
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 59
• Forwarded Client Voice packet has a 802.11 UP = 6 and maintains DSCP = EF
AP
Forwarded
Voice
Decode
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 60
• Forwarded Client Video packet has a 802.11 UP = 0 and maintains DSCP = AF
• The Video is not given the 802.11 upgrade because the WLAN is „Voice‟.
AP
Forwarded
Video
Decode
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 61
• Smart Phones capabilities are changing rapidly. Regularly review what devices in your environment and their Wi-Fi and BT behaviors are.
• 802.11n Packet Aggregation configuration recommendations are likely to change in the next couple code releases. Check the release notes for possible updates on configurations.
• BT and Wi-Fi Direct do share the same frequencies as Wi-Fi and will consume channel bandwidth. Claims that they are not is untrue.
• MIMO Antennas and Beam Forming are your friends.
Key Takeaways
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 62
• Receive 25 Cisco Preferred Access points for each session evaluation you complete.
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Complete Your Online
Session Evaluation
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Visit the Cisco Store for
Related Titles
http://theciscostores.com
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© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 65
Thank you.
65
Skinny Client Control Protocol
Data Length: 4
Reserved: 0x00000000
Message ID: 0x00000007
On Hook Message
On Hook
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 66
Addendum
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 67
Proof That We Had a SIP Marked UP a
SIP Media Packet Between the AP and
the WLAN Infrastructure.
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 68
• User Access Verification
• Username: cisco
• Password:
• AP0022.90e3.373c>en
• Password:
• AP0022.90e3.373c# show controller d1
• interface Dot11Radio1
• Radio AIR-AP1140A, Base Address 0021.1bfc.4280, BBlock version 0.00, Software version 2.10.3
• Serial number: FHH123000CW
• Number of supported simultaneous BSSID on Dot11Radio1: 16
• Carrier Set: Americas (OFDM) (US) (-A)
• Uniform Spreading Required: Yes
• Configured Frequency: 5745 MHz Channel 149
Show 802.11a AP Radio Information
Via AP Console ( Serial or Telnet)
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 69
• QBSS Load: 0x6, Policing Stats: Rx downgrades 112, Tx downgrades 0
• Classifier Stats tx_on_up6 0, tx_on_up4 2211
• Configured Local Access Class Parameters
• Back : cw-min 4 cw-max 10 fixed-slot 7 admission-cont
• Best : cw-min 4 cw-max 10 fixed-slot 3 admission-control Off txop 0
• Video : cw-min 3 cw-max 4 fixed-slot 2 admission-control Off txop 0
• Voice : cw-min 2 cw-max 3 fixed-slot 2 admission-control On txop 0
• SIP stats sip_udp_rx_pkt 1162, sip_tcp_rx_pkt 1049,
• downlink classified_pkt 38803,
• uplink classified_pkt 39408,
• num_processed_SIP_Calls 16
• Transmit queues: In Progress 0
• ---- Active --- In-Progress --------------- Counts --------------
• Cnt Quo Bas Max Cnt Quo Bas Sent Discard Fail Retry Multi
• Uplink 0 0 0 0 0 0 0 0 0 0 0 0
• Voice 0 0 0 0 0 0 0 73345 0 2 4470 1777
• Video 0 0 0 0 0 0 0 370 0 0 26 10
• Best 0 3 646 3 0 3 150 4941 0 0 67 34
Continuing ‘show cont d1’ From the AP
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 70
SIP VoIP Call Failure in This Case
SIP Information on the WLC Monitor Page
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 71
• These logs can be forwarded to syslog servers.
WLC – Trap Logs
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 72
• This is the original packet from the PC client radio to the AP.
• This is a voice packet from a softphone application.
• The 802.11 header and IP header have QoS values of „0‟
• RTP Sequence number is x‟10B6‟.
Tracing Voice QoS Marking with Snooping
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 73
• This is the second have of the packet from the PC client radio to the AP.
• The original voice packet from the softphone application has a RTP sequence number of 4278 (hex 10B6).
• The 802.11 header and IP header have QoS values of „0‟
The Client Packet Sequence Number
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 74
• This is the same packet with a CAPWAP wrapper.
• The packet is being forwarded by the AP to the WLC.
• The original voice packet from the softphone application has a RTP sequence number of 4278 (hex 10B6).
• The CAPWAP header has voice QoS.
The Client Packet Between the AP and WLC
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 75
IP Communicator 8.6 on Windows 7
with QoS Profile Enabled.
This was a HD 720p Video Call.
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 76
IP Communicator 8.6 on W7 with QoS
•HD Video – Call
• Voice G722 Packet
• DSCP = AF (41)
• 802.11e User Priority
(UP) = 4
• The Typical VoWLAN UP
Would Be 6
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 77
Same Call – This Is Next IP Comm
Packet
• Dynamic RTP Packet
• DSCP = AF (41)
• 802.11e UP = 4
• The Typical VoWLAN UP
Would Be 5
• This Keeps Both Packets in the Same 802.11e Access Category (AC), and Therefore Serialized Media Access
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 78
Bluetooth
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 79
ClassMaximum Permitted Power Range
(approximate)mW dBm
Class 1 100 20 ~100 meters
Class 2 2.5 4 ~10 meters
Class 3 1 0 ~1 meter
Basic BT Spec Basics
Version Data Rate Maximum Application Throughput
Version 1.2 1 Mbps 0.7 Mbit/s
Version 2.0 + EDR 2-3 Mbps 2.1 Mbit/s
Version 3.0 + HS Perhaps 24 Mbit/s(note: only with AMP, and depends on the
AMP. BT itself remains 2.1 Mbit/s max)
Version 4.0 Perhaps 24 Mbit/s(note: only with AMP, and depends on the
AMP. BT itself remains 2.1 Mbit/s max)
Alternative MAC and PHY (AMP) Implementation
Bluetooth - From Wikipedia, the free encyclopedia
© 2011 Cisco and/or its affiliates. All rights reserved. Cisco PublicBRKEWN-2000 80
End of Addendum