Cisco Aironet 1850 Series Deployment Manual
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Cisco Aironet 1850 Series Deployment Manual

Cisco Aironet 1850 Series Deployment Manual

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Cisco Aironet Series 1850 Access Point Deployment Guide
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Summary of Contents for Cisco Aironet 1850 Series

  • Page 1: Table Of Contents

    Cisco Aironet Series 1850 Access Point Deployment Guide Channel Rail Adapters – Cisco Part Number AIR-CHNL-ADAPTER Physical Hardware and Mounting Options of an AP Wall Mounting the AP Above the Ceiling Tiles Stadium / Harsh Environments Ethernet Cable Recommendation Antenna Cable Recommendation...
  • Page 2 802.11ac and Legacy Client Recommendations 802.11ac Devices on the Market Variables Impacting Performance A Quick Look at a Few Non-Optimal Installations New features Auxiliary Ethernet Port USB Port Understanding Multi-User MIMO Checking the Access Point LEDs Access Point Status LEDs Ethernet Port LEDs Q &...
  • Page 4 Revised: January 25, 2017,...

  • Page 5: Channel Rail Adapters - Cisco Part Number Air-Chnl-Adapter

    Channel Rail Adapters – Cisco Part Number AIR-CHNL-ADAPTER When mounting APs to ceiling channel rails, an optional channel adapter AIR-CHNL-ADAPTER is used. The channel adapter comes in a two-pack and is attached to the ceiling grid clip. Figure 1: Example of Channel Rails...

  • Page 7: Physical Hardware And Mounting Options Of An Ap

    Revised: January 25, 2017, Physical Hardware and Mounting Options of an AP Figure 4: AP 1850 Model port view Ports are easily accessible. Mode button is recessed and requires a tool such as a paperclip to engage. Note the vent holes below the ports, avoid using chemicals or solvents around the AP as the ingress of such materials have the potential to cause damage to the device.
  • Page 8 AP 1850 has similar physical dimensions as other Cisco APs but with a few differences in physical appearance, most of which are cosmetic changes to distinguish the different models. The mounting options and bracket configurations are identical and interchangeable between Cisco 1140, 1600, 1700, 1850, 2600, 2700, and 3700 series APs.
  • Page 9 Different installation options are available depending upon the requirements of the customer. Brackets are available from Cisco as well as third-party companies. During the ordering process, the customer may choose one of two brackets (but not both). Each bracket is a zero-dollar ($0) option at the time of configuration. If the customer does not choose a bracket, the selection default is AIR-AP-BRACKET-1, which is the most popular for ceiling installations.
  • Page 10 If the AP needs to be mounted directly to a ceiling on the grid work, then AIR-AP-BRACKET-1 is flush mounted and has the lowest profile. However, if the AP is mounted to an electrical box, other wiring fixture, inside a NEMA enclosure, or wall mounted, then AIR-AP-BRACKET-2 is a better choice.

  • Page 11: Wall Mounting The Ap

    Revised: January 25, 2017, Wall Mounting the AP When the AP needs to be wall-mounted, the installer should understand that walls can be a physical obstacle to the wireless signal. Therefore, maintaining 360 degree coverage may be compromised by the wall. If the wall is an outside wall and/or the goal is to send the signal in an 180-degree pattern instead, a directional antenna, often referred to as a “patch”...

  • Page 12: Above The Ceiling Tiles

    Revised: January 25, 2017, Above the Ceiling Tiles The AP 1850 series is rated for installation in the Plenum area (UL-2043). Many customers prefer to locate the AP in such a way that nothing is visible on the ceiling. In some cases, this is preferred for aesthetic reasons, so customers may install the AP above a drop ceiling.
  • Page 13 Note Installing APs above the ceiling tiles must be done only when mounting below the ceiling is not an option. The tiles must not be conductive; such installations will degrade advanced RF features such as voice and location, so verify coverage and performance. Always, try to mount the AP as close to the inside middle of the tile as possible, and avoid areas with obstructions Figure 11: Installing AP above ceiling tiles: Pick an area Clear of Obstructions and Avoid Ceiling Clutter...

  • Page 14: Stadium / Harsh Environments

    This seems to vary with regard to weather radar compliance, UNII-1 compliance, and so on. Check with your Cisco account team or the communications regulatory agency that has jurisdiction in your area.

  • Page 15: Ethernet Cable Recommendation

    Revised: January 25, 2017, Ethernet Cable Recommendation While the AP 1600, 1700, 1850, 2600, and 3600 work fine with CAT-5e cable, for newer cable installations, it is recommended that the customers use CAT6a. Because, CAT6a is the cabling required by the 10GE standard.

  • Page 16: Antenna Cable Recommendation

    (ULL) cables, which have the same characteristics as Times Microwave LMR-400 and LMR-600. Cisco cables carry the part number AIR-CAB (Aironet Cable) and its length parameter. For example, a 20 Ft length of LL cable with RP-TNC connector is Cisco AIR-CAB-020LL-R. These heavy black cables are not Plenum rated and are primarily for outdoor use or manufacturing areas.

  • Page 17: Access Point Spacing Recommendations

    To comply with FCC, EU, and EFTA RF exposure limits, antennas should be located at a minimum of Warning 7.9 inches (20 cm) or more from the body of all persons. For more information, see the Declarations of Conformity section in the Cisco Aironet 1850 Series Access Points Hardware Installation Guide.

  • Page 18: Installations In Idf Closets (Telecommunications Or Other Electrical Equipment)

    Try to refrain from installing the AP in the electrical closet, because the best place for the AP is as close to users as possible/practical. If you have remote antenna cables from such a closet, you may be required to use Plenum rated cable (see local fire/safety regulations for more on this). Below are a few URLs for understanding interference: http://www.cisco.com/en/US/prod/collateral/wireless/ps9391/ps9393/ps9394/prod_white_paper0900aecd807395a9_ns736_N etworking_Solutions_White_Paper.html http://www.cisco.com/en/US/prod/collateral/wireless/ps5678/ps10981/white_paper_c11-609300.html...

  • Page 19: Installations Inside And Around Elevators

    Revised: January 25, 2017, Installations Inside and Around Elevators Elevator coverage can sometimes be accomplished by placing APs in the near field of an elevator, typically on each floor near the elevator door. Because, elevators often have metal doors and the shafts are often concrete or contain other materials that degrade Wi-Fi coverage.

  • Page 20: Understanding Ap 1850 Powering Options

    Revised: January 25, 2017, Understanding AP 1850 Powering Options Figure 14: Local 48 Volt DC Power Supply...

  • Page 21: Poe Negotiation

    PoE Negotiation When the AP negotiates 802.3at (high power), it always tries first to negotiate using Cisco Discovery Protocol (CDP). If the negotiation fails, the AP will attempt to negotiate using Link Layer Discovery Protocol (LLDP). LLDP is a vendor-neutral method for advertising device identity and capabilities.
  • Page 22 Powering Options Power Budget Capability 802.3af, Cisco Power Injector 12.95 W 1852i: Full radio function AIR-PWRINJ5= 1852e: 2.4 GHz radio will shift to AUX and USB port disabled for both 1852i/e 1 This is the CDP/LLDP value that we ask in software, switch pads another 2 - 3 W for cable loss at 100 m.

  • Page 23: Approved Antennas And Radiation Patterns

    Revised: January 25, 2017, Approved antennas and Radiation Patterns Figure 16: Picture of the internal antennas within the AP 1850...
  • Page 24 The internal antennas are rated at 3 dBi at 2.4 GHz and 5 dBi at 5 GHz. Figure 17: Radiation pattern at 2.4 GHz Figure 18: Radiation pattern at 5 GHz...

  • Page 25: Antennas For Outdoor Deployments

    All Cisco antenna connectors are labeled as “A,” “B,” “C,” and so on. “A” has a higher priority than “B” or “C/D”. So, if the AP supports, for example 3 or 4 antennas and you only have 2 antennas, you can use them on ports “A” and “B” for a short period until you install the additional antennas provided you turn off the unused antenna ports on the controller or AP software.
  • Page 26 For additional information on Cisco antennas, see Cisco Aironet Antennas and Accessories Reference Guide. The antenna reference guide has details of all Cisco antennas. You can also find individual data sheets at http://www.cisco.com/en/US/products/hw/wireless/ps469/index.html. Always use Cisco antennas whenever possible. See Note http://www.cisco.com/en/US/prod/collateral/wireless/ps5678/ps10981/white_paper_c11-671769.pdf.
  • Page 27 Cisco has also introduced a new smaller size dipole. While this antenna does not have an articulating knuckle, it is much smaller in size and is a good choice when aesthetics is a primary concern. Figure 19: Standard Dipoles and Short Dipoles (On Right), on page shows an AP-3700 with both types of dipoles.
  • Page 28 In addition, the antennas below may also be used with 1600, 1850, 2600, 3600, and 3700 “e” Series APs. Figure 21: Specifications for the AIR-ANT2524Dx-R Dual-Band Dipole Antenna Figure 22: Radiation Pattern for the AIR-ANT2524Dx-R Dual-Band Dipole Antenna...
  • Page 29 Figure 23: Specifications for the AIR-ANT2566P4W-R Dual-Band Patch Antenna Figure 24: Radiation Pattern for the AIR-ANT2566P4W-R Dual-Band Patch Antenna...
  • Page 31 Assuming that the antenna is mounted on a wall, the Azimuth (in Red) is the signal going forward from the antenna. The elevation, in Blue, is the “up/down” pattern. Figure 25: Specifications for the AIR-ANT2524V4C-R Dual-Band Omni Antenna Figure 26: Radiation Pattern for the AIR-ANT2524V4C-R Dual-Band Omni Antenna...
  • Page 32 Figure 27: Specifications for the AIR-ANT2544V4M-R Dual-Band Omni Antenna...
  • Page 33 Figure 28: Radiation Patterns for the AIR-ANT2544V4M-R Dual-Band Omni Antenna...
  • Page 34 For a granular pattern, see the individual specification sheet of the respective antennas. Note...

  • Page 35: General Considerations - Wlan Best Practice Guidelines

    • While site surveys are generally recommended, if the design is done at half power and Cisco RRM is in place, sometimes a limited site survey (coverage check) is adequate for smaller venues. If it is a very challenging environment such as train connectivity, Gas &...
  • Page 36 • Try to leverage 5 GHz for more and cleaner channels / spectrum. • Try to create 10 – 20% cell overlap for optimized roaming and location calculations / transactions. • Consider separate SSIDs for Corporate and Guest Access with Guest being Rate Limited. •...

  • Page 37: 802.11Ac Wave-2 Primer And The Ap 1850

    802.11ac specification starts to get traction, many newer client adapters will have more advanced chipsets and support 3SS and 4SS as a subset to 802.11ac. Additionally, the Cisco AP 1850 fully supports all the DFS frequencies for more usable channels in the 5 GHz range.

  • Page 38: Understanding Channel Plans And Bonded Channels

    Revised: January 25, 2017, Understanding Channel Plans and Bonded Channels Currently in the US, there are 25 (20 MHz) channels, 12 (40 MHz) channels, and 6 (80 MHz) channels. 802.11ac (Wave-2) supports 160 MHz channels but currently there are only two channels available. This is likely to get better, because the Federal Communications Commission and other regulatory bodies realize the need for more unlicensed spectrum and are actively working to free up more spectrum.
  • Page 39 • With the opening up of 5.35 – 5.47 GHz and 5.85 – 5.925 GHz, the number of channels increases to 34/16/8/3. • If the industry manages to take back the TDWR channels, the number increases to 37/18/9/4. So, as time progresses, you should see additional channels becoming available. Figure 32: Proposed Channel Plan for US Theater (Not Fully Committed as of this Writing) Summary •...

  • Page 40: Understanding Channels And How They Relate To The Client

    Revised: January 25, 2017, Understanding Channels and How They Relate to the Client Most clients (USB) that are emerging are 2 spatial stream, and by using 80 MHz bonding, you can achieve up to 866 Mbps. Figure 33: Example of a 2-ss Client Bonded at 80 MHz, on page 40 shows the Netgear A6200 client card.
  • Page 41 The software reports channel is 36 (this is where the channel bonding starts). On a spectrum analyzer, you Note can see that the actual channels in use are 36, 40, 44, and 48. Figure 34: Example of a Bonded 80 MHz Channel For clients to link at 80 MHz, you have to set the channel width to 80 MHz on the AP.

  • Page 42: 802.11Ac And Legacy Client Recommendations

    802.11ac devices. It is expected that integrated notebooks and tablets (those devices often supporting 2 and 3 spatial streams) will start to become a commonplace. Currently, Cisco’s test bed for interoperability has the following configuration types. Table 2: Interoperability Matrix...
  • Page 43 Dell 1501 (Broadcom BCM4313) v5.60.48.35/v5.60.350.11 Dell 1505/1510/Broadcom 4321MCAG/4322HM 5.60.18.8 Dell 1515 (Atheros) 8.0.0.239 Dell 1520/Broadcom 43224HMS 5.60.48.18 Dell 1530/Broadcom BCM4359 v5.100.235.12 Cisco CB21 v1.3.0.532 Atheros HB92/HB97 8.0.0.320 Atheros HB95 7.7.0.358 MacBook Pro (Broadcom) 5.10.91.26 MacBook Air OSX 10.8.5, BCM43xx 1.0 (6.30.223.154.45)
  • Page 44 Handheld Devices Version Symbol MC75 Windows Mobile 6.5 / 3.00.2.0.006R Table 5: Phones and Printers Tested for Interoperability Phones and Printers Version Cisco 7921G — Cisco 7925G 1.4.2.LOADS Ascom i75 1.8.0 Spectralink 8030 119.081/131.030/132.030 Vocera B1000A 4.1.0.2817 Vocera B2000 4.0.0.345 Apple iPhone 4 iOS 7.0.3 (11B511)

  • Page 45: 802.11Ac Devices On The Market

    Revised: January 25, 2017, 802.11ac Devices on the Market • Integrated Devices – Shipping • Apple - Macbook Air • Intel Dual Band Wireless - AC 7260 • Samsung S4 • HTC ONE • ZTE Grand Memo • USB Clients - Shipping •...

  • Page 46: Variables Impacting Performance

    Revised: January 25, 2017, Variables Impacting Performance Some early observations show that USB clients can appear to be a bit slow in performance depending on drivers, USB port versions, and so on. Also, it is observed that some clients have trouble in maintaining an 80 MHz bandwidth in the Dynamic Frequency Selection (DFS) bands.
  • Page 47 If you are doing a Rate versus Range demo, it is important to choose your channel carefully. Obviously, you need to ensure that the channel is clear. However, not all channels are created equal. Some channels have total output power restrictions. So, Cisco recommends UNII-3 or UNII-2, over UNII-1 for best performance.
  • Page 48 Revised: January 25, 2017,...

  • Page 49: A Quick Look At A Few Non-Optimal Installations

    A Quick Look at a Few Non-Optimal Installations This section lists some examples of installations that are not recommended. It is very difficult to provide good Wi-Fi service with a poor installation. Always try to avoid metal and clutter. Figure 36: Example of an AP Installation Near Metal and Clutter (Try to Avoid Metal and Clutter) Figure 37: Patch Antenna Against a Metal Fence...
  • Page 50 Figure 38: Example of an AP Installation Near Metal and Clutter (Try to Avoid Metal and Clutter) Figure 39: Example of a Poor Installation - Access Point Needs to be Level and Not Swing or Move About...
  • Page 51 When mounting devices, the AP should be level and secured so that it does not sway or move. Keep the AP away from metal objects and try to place it as close to the users as possible. Figure 40: Example of a Poor Installation – Access Point is too High and Buried in Conductive Foil...
  • Page 52 Remember, the best place for an AP is as close to the users as possible. Avoid metal or conductive objects in the near field (they cause the radio waves to become directional and increases nulls (dead spots)). If you must mount the AP in a high ceiling, look at directional antennas to direct (angle down) the signal to the intended target area and always mount dipoles in the correct orientation.
  • Page 53 When mounting antennas outside, always mount with the WIRES DOWN and never obstruct or put weather proofing material over the drain holes. Figure 42: Always Mount Antennas Outdoors with Leads DOWN (Indoors Does not Matter) Figure 43: If Antenna Connectors are Exposed to Weather – Coax-Seal Should be Used but if Present, Do Not Cover Antenna Drain Holes...

  • Page 55: New Features

    Wave-2 clients become more commonplace. To address this potential issue, we have implemented Link Aggregation into the Cisco AP 1850. Link Aggregation is the only method to gain higher throughput on AP 1850 as it does not support multi-gigabit technologies such as NBase-T.
  • Page 56 L4 source and destination ports. A sample configuration on the Cisco 3850 switch is shown below, where the AP 1850 is connected to G6/0/13 and G6/0/3 on the wired0(plink) and wired1 (Aux port) respectively.

  • Page 57: Usb Port

    If you configure the switch port to trunk, the AP 1850 will be in the native VLAN and the AUX port will also be in native by default. Traffic from the AUX port will not be sent to the WLC, and the AP 1850's built-in switch will drop the traffic in the native VLAN. Note This feature will not be implemented on the initial release of the code.

  • Page 58: Understanding Multi-User Mimo

    Revised: January 25, 2017, Understanding Multi-User MIMO With 802.11n, a device can transmit multiple spatial streams at once, but only directed to a single address. For individually addressed frames, only a single device (or user) gets data at a time. This is referred to as Single-User MIMO (SU-MIMO). With the advent of 802.11ac Wave-2, a new technology is defined, called Multi-User MIMO (MU-MIMO).
  • Page 59 In addition, when the AP sends data to user 2, it forms a beam towards user 2, and forms notches (nulls) towards users 1 and 3, as shown by the red curve. The yellow curve shows a similar beam towards user 3 and nulls towards users 1 and 2. In this way, each of users 1, 2, and 3 receives a strong copy of the desired data that is only slightly degraded by interference from data for the other users.
  • Page 60 transmission. The number of clients depends on the type of stream, for example one client can receive 1SS while another is receiving 2SS. • Wi-Fi alliance certification for Wave-2 includes MU-MIMO. • Take-away: MU-MIMO is designed to maximize downlink capacity by overlapping clients in space (multiplexing). Best performance occurs with high client counts and high AP densities.

  • Page 61: Checking The Access Point Leds

    Revised: January 25, 2017, Checking the Access Point LEDs Access Point Status LEDs Regarding LED status colors, it is expected that there will be small variations in color intensity and hue Note from unit to unit. This is within the normal range of the LED manufacturer’s specifications and is not a defect.

  • Page 62: Ethernet Port Leds

    Blinking red and off Environment variable failure Bad MAC address Ethernet failure during image recovery Boot environment failure No Cisco image file Boot failure Cisco IOS errors Software failure; try disconnecting and reconnecting unit power Cycling through red, green, amber, and General warning;...

  • Page 63: Q & A

    • Installations should be done based on lessons learned from the site survey. The better the survey the less likely any connectivity problems will occur. • Cisco has an advanced services team that can perform WLAN surveys or help with the wireless design if a partner is not available or able to do the same.

  • Page 64: References

    Optimizing Enterprise Video over Wireless LAN http://www.cisco.com/en/US/prod/collateral/wireless/ps6302/ps8322/ps10315/ps10325/white_paper_c11-577721.html Cisco 7925 IP Phone Deployment Guide http://www.cisco.com/en/US/docs/voice_ip_comm/cuipph/7925g/7_0/english/deployment/guide/7925dply.pdf Cisco Mobility Services Engine – WLAN Location Deployment Guide http://www.cisco.com/en/US/products/ps9742/products_tech_note09186a00809d1529.shtml WLAN Design Guide for High Density Client Environments in Higher Education http://www.cisco.com/en/US/prod/collateral/wireless/ps5678/ps10981/design_guide_c07-693245.pdf Mobility Design Guides http://www.cisco.com/en/US/netsol/ns820/networking_solutions_program_home.html...
  • Page 65 802.11ac Customer Use Cases http://www.cisco.com/en/US/prod/collateral/wireless/ps5678/ps13367/at_a_glance_c45-729588.pdf Adaptive Radio Modules http://www.cisco.com/en/US/prod/collateral/wireless/ps5678/ps11983/at_a_glance_c45-727334.pdf New Generation of Cisco Aironet Access Points http://www.cisco.com/en/US/prod/collateral/wireless/ps5678/ps10981/at_a_glance_c45-636090.pdf 802.11ac Wave-1 Module Datasheet http://www.cisco.com/en/US/prod/collateral/modules/ps12859/ps13128/data_sheet_c78-727794.html 802.11ac – The Fifth Generation Wi-Fi Technical Whitepaper http://www.cisco.com/en/US/prod/collateral/wireless/ps5678/ps11983/white_paper_c11-713103_ps12859_Products_White_ Paper.html...
  • Page 66 Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: www.cisco.com/go/trademarks . Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company.
  • Page 67 Cisco Systems, Inc. Cisco Systems (USA) Pte. Ltd. Cisco Systems International BV San Jose, CA 95134-1706 Singapore Amsterdam, The Netherlands Cisco has more than 200 offices worldwide. Addresses, phone numbers, and fax numbers are listed on the Cisco Website at www.cisco.com/go/offices.

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