Posts with #cisco wireless - cisco wireless ap tag
In a Cisco Mobility Express network, Access Point (AP) running the wireless controller function is designated as the Master AP. The other Access Points which are managed by this Master APare referred as Subordinate APs.
NOTE: In this article, Mobility Express refers to the Cisco 1800 series Access Point which supports the controller functionality. It is referred to as Master AP.
The Master AP has two roles:
1. It functions and operates as a wireless LAN controller to manage and control the Subordinate APs. The Subordinate APs operates as lightweight access points to serve clients.
2. Master AP operates as an Access Point to serve clients
Supported Cisco Aironet Access Points
Access Points which support the Mobility Express controller function capability are listed in the following table:
Table3: Access Points supporting Mobility Access (Master APs)
Access Points supported as Master AP
Supported Model Numbers
Cisco Aironet 1850 Series
Cisco Aironet 1830 Series
1. The model numbers that contain-UX support the universal regulatory domain.
2. The model numbers that contain -x- is a placeholder for the actual letter indicating the model's regulatory domain.
The Access Points which operate as subordinate APs are listed in the following table:
Table 4: Access Points supported as Subordinates
Access Points supported as Subordinate APs
Supported Model Numbers
Cisco Aironet 700i Series
• AIR-CAP702I- x-K9
Cisco Aironet 700w Series
• AIR-CAP702W- x-K9
Cisco Aironet 1600 Series
Cisco Aironet 1700 Series
• AIR-CAP1702I- x-K9
Cisco Aironet 1800 Series
Cisco Aironet 2600 Series
Cisco Aironet 2700 Series
Cisco Aironet 3600 Series
Cisco Aironet 3700 Series
How to Deploy Your Mobility Express?
In three easy steps, set up an enterprise-class WLAN in a small or medium-sized business. Or get industry-leading functionality, including guest access and RF parameter optimization, with our advanced settings. The choice is yours.
- Set up: Wirelessly connect to the Aironet 802.11ac Wave 2 access point using any laptop, smartphone, or tablet.
- Configure: From a web browser or Cisco wireless app, use the setup wizard to enable multiple APs simultaneously.
- Operate: Wirelessly access the management dashboard to operate, monitor, and troubleshoot your network.
More Detailed STEPS & Examples of Cisco Mobility Express Guide
The Cisco 2800 and 3800 Series Access Points target customers requiring support for mission-critical and best in class applications.
The 2800/3800 embodies ClientLink 4.0, an innovative antenna technology comprising four transmit radios and four receive radios called 4x4 in a Multiple Input Multiple Output (MIMO) configuration and supporting three spatial streams (3SS), together referenced as 4x4:3. Using this type of antenna system along with additional Modulation Coding Scheme (MCS) rates supporting up to 256 QAM and up to 160 MHz channel bonding, rates of up to 5 Gbps can be supported.
ClientLink 4.0 uses these features along with an additional antenna (N+1) to allow for beam-forming for all 802.11a/g/n/ac and now ac Wave-2 clients including those supporting 3 spatial streams.
MultiGigabit Ethernet, also known as MGig or NBaseT, provides multiple gigabit uplink speeds of 2.5 Gbps and 5 Gbps in addition to 100-Mbps and 1-Gbps speeds. All speeds are supported on Category 5e cabling for an industry first, as well as 10GBASE-T cabling. This is huge achievement which can result in significant cost savings for large campus network. No longer are you constrained to 1Gbps, nor do you have to worry about running new cabling in order to support the new speeds.
Cisco Catalyst Multigigabit technology solves these challenges on their newer Catalyst 3850, 4500E and 3560-CX switches, with the 3800 Series access point taking full advantage of the single-wire MGig connection. This is an incredibly important consideration for 802.11ac Wave 2 implementations, and should be reviewed before any deployment.
Peter Jones, Principle Engineer with Cisco and NBASE-T Alliance chair, gave an impressive presentation at TFDX earlier this year, detailing the technical achievements engineered to overcome this obstacle of capacity.
Expansion Module Slot
The 3800 Series AP sports a module port for future expandability. Physical modules can be fitted for value-adds like advanced security or hyperlocation technologies.
Designed for small and medium-sized networks, the1850 Series delivers the performance you need for the ongoing proliferation of Wave 2 (the latest Wi-Fi technology you should try) as well as support for older Wi-Fi devices.
With 802.11ac Wave 2, the Aironet 1850 Series provides a data rate of up to 1.7 Gbps on the 5-GHz radio, more than triple the rates offered by today’s high-end 802.11n access points. It also enables a total aggregate dual-radio data rate of 2.0 Gbps, providing the necessary foundation for enterprise and service provider networks to stay ahead of the performance and bandwidth expectations and needs of their wireless users.
Gigabit Wi-Fi Has Fully Arrived with the Aironet 1850 Series Access Points
How It Works
Compare 1850 Series Models
You should hear of the Fat, Thin, and Fit APs. What are they?
The terms thin and fat have been applied to WLAN access points (APs) in many different ways.
- Some vendors use thin AP to refer to entry-level/residential-grade products with few advanced features, in comparison to fat APs rich with enterprise network features like VLAN tagging and SNMP-based management.
- Some use thin AP to refer to products that can't be configured or used on their own, but instead are part of a WLAN switching system that governs both setup and operation. In this case, a fat AP is any stand-alone AP, no matter how extensive that AP's feature set.
- Some use thin AP to refer to products that offload selected tasks to an upstream server -- for example, communicating with 802.1X Authentication Servers, generating encryption keys, acting as a VPN gateway, or re-routing traffic for cross-network mobility. In comparison, any of these tasks could be performed directly on a fat AP, without relying on an upstream server.
In the autonomous architecture, the WTPs (Wireless Termination Point) completely implement and terminate the 802.11 function so that frames on the wired LAN are 802.3 frames. Each WTP can be independently managed as a separate network entity on the network. The access point in such a network is often called a Fat AP.
FAT APs in Autonomous WLAN Network Architecture
During the initial stages of WLAN deployment, most APs were autonomous APs, and manageable as independent entities in the network. During the past few years, centralized architectures (discussed next) with ACs and WTPs have gained popularity. The primary advantage of the centralized architecture is that it provides network administrators with a structured and hierarchical mode of control for multiple WTPs in the enterprise.
The centralized architecture is a hierarchical architecture that involves a WLAN controller that is responsible for configuration, control, and management of several WTPs. The WLAN controller is also known as the Access Controller (AC). The 802.11 function is split between the WTP and the AC. Because the WTPs in this model have a reduced function as compared to the autonomous architecture, they are also known as Thin APs. Some of the functions on the APs are variable, as discussed in the following section.
Thin APs in Centralized WLAN Network Architecture
In the distributed architecture, the various WTPs can form distributed networks with other WTPs through wired or wireless connections. A mesh network of WTPs is one example of such an architecture. The WTPs in the mesh can be linked with 802.11 links or wired 802.3 links. This architecture is often used in municipal networks and other deployments where an outdoor component is involved. This article does not address the distributed architecture.
WTP Functions Fat, Thin, and Fit APs
To understand the autonomous and centralized architecture, it is useful to look at the functions performed by the APs. We start with the Fat APs, which form the core of the autonomous architecture, followed by the Thin APs, which were specified as part of the WLAN switch- or controller-based centralized architecture. The article will then outline the functions of a new variant called the Fit AP, an optimized version of the AP for centralized architectures.
Fat Access Points
Figure1 shows an example of an autonomous network with a fat access point. The AP is an addressable node in the network with its own IP address on its interfaces. It can forward traffic between the wired and wireless interfaces. It can also have more than one wired interface and can forward traffic between the wired interfaces similar to a Layer 2 or Layer 3 switch. Connectivity to the wired enterprise can be through a Layer 2 or Layer 3 network.
It is important to understand that there is no backhauling of traffic from the Fat AP to another device through tunnels. This aspect is important and is addressed when discussing the other AP types. In addition, Fat APs can provide router-like functions such as the Dynamic Host Configuration Protocol (DHCP) server capabilities.
Management of the AP is done through a protocol such as the Simple Network Management Protocol (SNMP) or the Hypertext Transfer Protocol (HTTP) for Web-based management and a Command-Line Interface (CLI). To manage multiple APs, the network manager has to connect to each AP through one of these management schemes. Each AP shows up on the network map as a separate node. Any aggregation of the nodes for management and control has to be done at the Network Management System (NMS) level, which involves development of an NMS application.
Fat APs also have enhanced capabilities such as Access Control Lists (ACLs), which permit filtering of traffic for specific WLAN clients. Another significant capability of these devices is configuration and enforcement of Quality of Service (QoS)-related functions. For example, traffic from specific mobile stations might need to have a higher priority than others. Or, you might need to insert and enforce IEEE 802.1p priority or Differentiated Services Code Point (DSCP) for traffic from mobile stations. In summary, these APs act like a switch or router in that they provide many of the functions of such devices.
The downside of such APs is complexity. Fat APs tend to be built on powerful hardware and require complex software. These devices are expensive to install and maintain because of the complexity. Nevertheless, the devices have uses in smaller network installations.
Some Fat AP installations still use a controller at the back end for control and management functions. These controllers lead to a slightly scaled-down version of the Fat AP, called, not surprisingly, a Fit AP, discussed later.
Thin Access Points
As their name indicates, Thin APs are intended to reduce the complexity of APs. An important motivation for this reduction is the location of APs. In several enterprises, APs are plenum-mounted (and thus in hard-to-reach areas) so that they can provide optimum radio connectivity for end stations. In environments like warehouses, this is even more evident. For such reasons, network managers prefer to install APs just once and not have to perform complex maintenance on them.
Thin APs are often known as intelligent antennas, in that their primary function is to receive and transmit wireless traffic. They backhaul the wireless frames to a controller where the frames are processed before being switched to the wired LAN (see the Figure ‘Thin APs in Centralized WLAN Network Architecture’).
The APs use a (typically secure) tunnel to backhaul the wireless traffic to the controller. In their most basic form, Thin APs do not even perform WLAN encryption such as Wired Equivalence Privacy (WEP) or WiFi Protected Access (WPA/WPA2). This encryption is done at the controller the APs just transmit or receive the encrypted wireless frames, thereby keeping the APs simple and avoiding the necessity to upgrade their hardware or software.
The introduction of WPA2 necessitated encryption on the controller. Although WPA was hardware-compatible with WEP and required only a firmware upgrade, WPA2 was not backward-compatible. Instead of replacing APs across the enterprise, network managers could just backhaul the wireless traffic to the controller where the WPA2 decryption was done, and the frames were sent on the wired LAN.
The protocol between the AP and the controller for carrying the control and data traffic was proprietary. Also, there is no capability to manage the AP as a single entity on the Layer 2/3 network it can be managed only through the controller, to which the NMS can communicate through HTTP, SNMP, or CLI/Telnet. A controller can manage and control multiple APs, implying that the controller should be based on powerful hardware and often be able to perform switching and routing functions. Another important requirement is that the connectivity and tunnel between the AP and the AC should ensure low delay for packets between those two entities.
With Thin APs, QoS enforcement and ACL-based filtering are handled at the controller not a problem because all the frames from the AP have to pass through the controller anyway. Centralized control functions for ACLs and QoS are not new they were implemented in networks with Fat APs too. Such installations have controllers that act as the gateway for managing traffic from APs to the wired network. However, the controller function takes on a new dimension with Thin APs, especially with respect to the data plane and forwarding functions. The controller function subsequently was integrated into Ethernet switches that connected the wireless and wired LANs the motivation for the family of devices known as WLAN switches.
The Wireless MAC architecture in this scenario is known as the Remote MAC architecture. The entire set of 802.11 MAC functions is offloaded to the WLAN controller, including the delay-sensitive MAC functions.
Fit Access Points
Fit APs are gaining in popularity in that they try to take advantage of the best of both worlds that is, the Fat APs and the Thin APs. A Fit AP provides the wireless encryption while using the AC for the actual key exchange. This approach is used for newer APs that use the latest wireless chipsets supporting WPA2. The management and policy functions reside on the controller that connects to multiple APs through tunnels.
Also, Fit APs provide additional functions such as DHCP relay for the station to obtain an IP address through DHCP. In addition, Fit APs can perform functions such as VLAN tagging based on the Service Set Identifier (SSID) that the client uses to associate with the AP (when the AP supports multiple SSIDs).
Two types of MAC implementations are possible with Fit APs, known as the Local MAC and the Split MAC architectures. Local MAC is where all the wireless MAC functions are performed at the AP. The complete 802.11 MAC functions, including management and control frame processing, are resident on the APs. These functions include time-sensitive functions (also known as Real Time MAC functions).
The Split MAC architecture divides the implementation of the MAC functions between the AP and the controller. The real-time MAC functions include functions such as beacon generation, probe transmission and response, control frame processing (for example Request to Send and Clear to Send RTS and CTS), retransmission, and so on. The non-real time functions include authentication and deauthentication; association and reassociation; bridging between Ethernet and Wireless LAN; fragmentation; and so on.
Vendors differ in the type of functions that are split between the AP and the controller, and in some cases, even about what constitutes real time. One common implementation of a Fit AP involves local MAC at the AP and control and management functions at the AP.
Reference from http://www.cisco.com/c/en/us/about/press/internet-protocol-journal/back-issues/table-contents-13/wireless-lan-switches.html
In this article we will share 10 facts of Cisco wireless that you should know. Cisco Wireless related facts may make you shout out: “Really?”
If you have any suggestions for additions, please share with us or go to the original page to have a discussion.
Top 10 Cisco Wireless “Good to Know”
1) Controller interface vlan tagging, native vlan 1
Cisco Switches by default do not tag the native vlan. Also by default, the native vlan is 1, therefore vlan 1 is untagged.
When establishing a trunk to a Cisco Wireless LAN Controller, it's important to be aware of how tagged vs untagged are identified.
(4400-A) >show interface summary
Interface Name Port Vlan Id IP Address Type Ap Mgr Guest
--------------- ---- ---------- -------------- ----- ------ -----
ap-manager 1 untagged 188.8.131.52 Static Yes No
management 1 untagged 184.108.40.206 Static No No
When going through a WLC's initial startup wizard, if untagged for the Management Interface’s vlan is desired, enter '0' (zero) when prompted for the management interface's vlan, as this is equivalent to 'untagged':
Welcome to the Cisco Wizard Configuration Tool
Use the '-' character to backup
Would you like to terminate autoinstall? [yes]:
Management Interface VLAN Identifier (0 = untagged): 0
2) AP Image Names: w7 vs w8
ap image names:
w7 = standalone
w8 = lightweight
Lightweight/controller based/capwap/lwapp image:
Cisco IOS Software, C1130 Software (C1130-K9W8-M), Version 12.4(23c)JZ, RELEASE SOFTWARE (fc1) c1130-k9w8-mx.124-23c.JZ
Cisco IOS Software, C1140 Software (C1140-K9W7-M), Version 12.4(21a)JY, RELEASE SOFTWARE (fc1)c1140-k9w7-mx.124-21a.JY
3) AP Part Numbers: LAP vs AP
Most Cisco Access Points are available with two part numbers.
LAPxxx = shipped new from manufacturing with lightweight image
APxxx = shipped new from manufacturing with autonomous image
Same physical hardware.
Same physical ap's, the first is shipped with a lightweight image, the second with an IOS image:
Most AP's can be converted between both modes.
4) Wireless LAN Controller DHCP Handling
Wireless Lan Controllers perform 'dhcp proxy' by default. The ‘Dhcp Server’ IP Address configured on controller interfaces acts the same way as an 'ip helper' statement on a Cisco router.
With this configuration in place, an IP Helper statement on the wireless clients’ default gateway router is not necessary.
DHCP Proxy can be configured via the WLC’s GUI in 6.x and 7.x code (Controller -> Advanced -> DHCP).
Earlier code requires CLI access for configuration:
(WLC) >show dhcp proxy
DHCP Proxy Behaviour: enabled
(WLC) >config dhcp proxy disable
(WLC) >show dhcp proxy
DHCP Proxy Behaviour: disabled
5) Lightweight AP modes: Local vs H-Reap (FlexConnect)
Local mode Access Point: tunnels all traffic to controller, controller responsible for tagging packets and putting them on the wired network, AP's switchport configured in access mode/non trunk.
H-Reap mode Access Point: ap's function similarly to standalone ap's, tag their own traffic, AP's switchport configured as trunk. Vlan tagging requires configuration on each H-Reap mode AP (Via the controller’s Gui).
*H-Reap was renamed to 'FlexConnect' in 7.2 code.
6) Legacy Access Points End of Support
1500 Series, LAP-1505, LAP-1510: Last supported in 4.2.M controller code.
1000 Series, AP1010, AP1020, AP1030: Last supported in 4.2 controller code.
1120/1230 Series, 1121, 1230, etc. Last supported in 7.0 code.
1130, 1240, 1520. Last supported in 8.0 code (no support in 8.1 and later).
Software Release Support for Access Points
These Access Points will not join a controller running code later than supported.
7) AP console settings
•8 data bits
•1 stop bit
*********No hardware flow control******
These are the same settings for other Cisco devices. It is essential that AP's console session have flow control disabled. Most other Cisco devices will tolerate this setting if not disabled, but AP's will not. The result is typically no display and/or keyboard response.
8) WLC Dynamic Interfaces, Does it Route?
Those familiar with Cisco routing and switching may get the impression that Wireless Lan Controllers have routing capability. This may seem apparent due to the fact that multiple dynamic interfaces with ip addresses may be configured. WLC's do not route.
The ip addresses assigned to the dynamic interfaces are not used for client traffic passing through the controller.
Dynamic interfaces' IP addresses primary functions are:
+ Referenced as Giaddr for DHCP Proxy (relay)
+ Multicast. For wireless multicast receivers connected to local mode ap's, if the controller has IGMP snooping enabled, it will proxy/spoof IGMP reports to the wired network using the client's corresponding dynamic interface IP address. If IGMP snooping on the controller is disabled, client IGMP reports are forwarded unmodified to the wired network.
+The IP address is checked when you do an intercontroller roam, so that the WLC knows if you did a L2 or L3 roam, and whether to anchor your traffic or to pass the MSCB entry to the new WLC.
By default, multicast traffic is not forwarded by Wireless Lan Controllers for local mode ap's.
A common source of confusion is that Autonomous Mode AP's will forward multicast just as they would unicast, so no configuration is required. In the instance of Autonomous AP's being converted to Controller Based/Lightweight, multicast will no longer work until configured on the controller.
Since Controller based H-Reap mode ap's forward their own traffic, multicast will behave as if the AP were a standalone AP, and no controller configuration is required.
10) Anchored Wlans. Where does authentication occur?
For Layer 3 authentication, e.g. Web Auth, authentication handling occurs on the Anchor Controller.
For Layer 2 authentication, e.g. 802.1x, authentication handling occurs on the Foreign controller.
A: Regarding point 8 about the dynamic interfaces configured on the WLC, it is perhaps worth adding that they can act as source addresses when clients try to obtain an ip address via DHCP. This document explains more: http://www.cisco.com/en/US/tech/tk722/tk809/technologies_configuration_example09186a00805e7a24.shtml
B: You may want to add what else the dynamic-interface IP comes to play for. The IP address is checked when you do an intercontroller roam, so that the WLC knows if you did a L2 or L3 roam, and whether to anchor your traffic or to pass the MSCB entry to the new WLC.
C: A note on the AP support - I believe that some APs will join WLCs with code 8.1 but new features won't be supported such as AVC on local FlexConnect due to hardware limitations.
Note The Cisco 1040 Series, 1140 Series, and 1260 Series access points have feature parity with Cisco Wireless Release 8.0. Features introduced in Cisco Wireless Release 8.1 and later are not supported on these access points.
More Topics Related to Cisco Wireless you can read here: http://blog.router-switch.com/category/technology/wireless/
Cisco HDX Manages Performance on Crowded Wi-Fi Networks Wi-Fi traffic is everywhere.
More users-employees, customers, and guests alike - are connecting to the network. Most of these users carry multiple Wi-Fi devices and many devices support only wireless connectivity. All this leads to lots of very dense Wi-Fi traffic in the air.
And with the introduction of 802.11ac Wave 2 technology, networks are only going to get more crowded. That’s why Cisco has enhanced its High Density Experience (HDX) suite of solutions, which automatically manages the airwaves and improves Wi-Fi performance.
Now, available on Cisco’s Indoor Access Points the Cisco Aironet 3800 and 2800 Series and the Cisco’s Outdoor Access Points the Cisco Aironet 1570 and 1560 Series Outdoor Access Point,
HDX is regularly updated with new features that alleviate high-density network strain and improve user experiences as 802.11ac and other trends load the airwaves with more traffic.
Managing Your Airwaves
• Alleviate network strain when large volumes of client devices contend for access point connectivity
• Improve Wi-Fi throughput and spectrum efficiency
• Prevent unnecessary Wi-Fi disconnections
• Enable access points to quickly change channels to mitigate interference or narrow bandwidth instead of abandoning the entire channel
• Allocate air time to specific user groups
Simplifying and Automating RF Tasks Below are some of the more recent HDX feature enhancements:
• Enhanced Optimized Roaming: If performance degrades as Wi-Fi users move, this feature intelligently steers clients to an access point with a stronger signal - without interrupting the connection.
• CleanAir for 160-MHz Channels: Proactive protection against RF interference with spectrum scanning, source identification, and remediation that now works across 160-MHz channel widths.
• ClientLink: Cisco’s patented beamforming technology that improves performance of 802.11ac clients as well as 802.11a/g/n legacy clients.
• Dynamic Bandwidth Selection (with FlexDFS): Continually analyzes and selects the best channel width for use in current conditions. If radar is detected on part, but not all, of the frequency, the access point can narrow the serving channel from 160 to 80 to 40 or 20 MHz, rather than moving entirely to a new frequency, enhancing spectrum efficiency.
• Event-Driven Radio Resource Management (ED-RRM): Rapidly changes channels to avoid interference, doing in seconds what previously could take minutes. IT can also set thresholds to determine when traffic automatically moves to a clear or less busy channel.
• HDX Air Time Fairness (ATF): Simplifies Wi-Fi traffic management by enabling network administrators to allocate specific percentages of airtime to heterogeneous groups of clients or customers.
More about the Cisco HDX Solution
HDX is a broad and comprehensive suite of solutions delivered in the Cisco Aironet 2700 and 3700 Series access points, consisting of both hardware and custom application-specific integrated circuits (ASICs) and software elements to provide optimal performance in high-density WLAN environments.
Cisco developed HDX to address the increasing proliferation of both wireless networks and wireless devices (such as smartphones, tablets, and PCs) carried by individual users - creating increased traffic. HDX directly addresses the expectations of both network administrators and mobile device users that WLANs will continue
to “just work” despite increasingly demanding scenarios.
In brief, when designing HDX, Cisco carefully considered the ramifications of increases in:
● Access point density (public and residential)
● Co-channel and adjacent channel interference
● Inter-access point contention
● Intra-access point contention (due to more clients and increased upstream)
● Client density
● Variation in client types
Therefore, HDX is essential for WLANs operating in environments that are characterized by any of the following:
● Many clients connected to a single access point
● Many colocated access points deployed as a single WLAN with partial to full channel (frequency) overlap
● Many independent yet neighboring WLANs needing to coexist in the same spectrum
● Increased loading due to more upstream and downstream video traffic: more FaceTime and Skype traffic (bidirectional interactive apps, unified communications), more mobile app downloads, more uploading of personal content (photos, cloud/sync functions, etc.)
HDX Features Provided in the Cisco Aironet 2700 and 3700 Series
The primary features of HDX are:
● Cisco CleanAir 80 MHz
● Cisco ClientLink 3.0
● Optimized Roaming enhanced with BSS Transition Management
● Turbo performance
● Enhancement: Dynamic Bandwidth Selection (with Flexible Dynamic Frequency Selection (FlexDFS))
● Enhancement: Wi-Fi triggered Event-Driven Radio Resource Management (ED-RRM)
● Enhancement: Air Time Fairness
● RF noise reduction (available in future versions)
Each of these features is detailed in the sections that follow.
Cisco is the only equipment vendor to have the complete suite of features that make up HDX. Furthermore, it is the only equipment vendor to have a purpose-built access point with hardware acceleration that supports HDX and that is designed specifically for the high-performance challenges of 802.11ac.
To learn more about the Cisco HDX solution, visit
More Related Cisco Wireless Topics
You can relax when you have Cisco Aironet 3800 Series Access Points deployed and running.
Why? Cisco Aironet 3800 Series Access Points and Cisco Aironet 2800 Series Access Points support 802.11ac Wave 2, increasing bandwidth for more devices. Cisco goes beyond the industry standard to provide advanced innovation that self-optimizes your network in unpredicted times of high density, with a feature called Cisco Flexible Radio Assignment.
In addition to the device deluge, there are times when a lot of people moving in and out of your network can complicate a high-density network environment. A manual approach to recalibrating your wireless network every time there is an unexpected usage change isn’t practical. Flexible Radio Assignment automatically adapts to these temporary high-density environment changes.
Flexible Radio Assignment is a Cisco innovation designed to provide a better mobile user experience for high-density networks by automatically detecting when a large number of devices are connected to a network. Once the detection is made, Flexible Radio Assignment changes its dual radios in the access point from 2.4 GHz/5 GHz to 5 GHz/5 GHz to serve more clients. The access point performs this function while still monitoring the network for security threats and RF interference that may affect performance.
Flexible Radio Assignment has three different modes of operation:
• Default operating mode, which serves clients on both 2.4 GHz and 5 GHz
• Dual 5-GHz mode, which serves clients on both 5-GHz radios
• Wireless security monitoring, which scans both 2.4 GHz and 5 GHz for security threats while also serving 5-GHz clients
How do these features work in an everyday setting?
The best way to describe this feature is by returning to the original scenario of a large number of office workers expecting to hear a speech from the boss.
As the first group of workers trickles into the conference room, the Cisco Aironet 3800 Series Access Points automatically determine that there is ample 2.4-GHz and 5-GHz wireless coverage. During the minutes before the meeting, these access points use the wireless security-monitoring mode in the 2.4-GHz radio to continually scan both bands for RF interference or security threats. Cisco CleanAir Technology eliminates any detected interference while rogue detection and containment and wireless intrusion prevention systems (wIPS) rectify security threats.
As the meeting looms closer and the high-density scenario is realized, Flexible Radio Assignment adapts in real time, and the Cisco access point radios provide the precise amount of 2.4-GHz and 5-GHz coverage. Some access points will convert both radios to the 5-GHz band to serve the additional clients and provide better coverage and performance during the high-density event.
This availability of the larger band is extremely helpful, as a majority of the audience is following the video feed of the conference over their wireless devices too.
Following the meeting, the access points return to default operating mode, offering 2.4-GHz/5-GHz coverage while other access points transition to wireless security monitoring mode.
The most amazing thing about this scenario is that, as the network administrator, you didn’t have to do anything to facilitate the extra bandwidth. The Cisco Aironet access point is intelligent enough to do the entire thing itself. This allows you to concentrate on more pressing issues.
Flexible Radio Assignment isn’t strictly for workplace environments.
It can be used in nearly any instance where a large group of people gather. Whether it’s in an educational setting, a hotel lobby, or a hospital, Flexible Radio Assignment is a boon to any wireless network.
From bring your own device (BYOD) to Internet-of-Things (IoT) devices, the proliferation of wireless items brings a new host of challenges as bandwidth-intense applications grow. Flexible Radio Assignment rises to these challenges and augments your wireless network to do more without making your job difficult.
Now if only the Flexible Radio Assignment could give Bob from accounting some new jokes.
Everyone says I love 802.11ac Wave 2. The Impact of 802.11ac Wave 2 is World Wide, Why? We also talked about the 802.11ac Wave 2 and 802.11ac Wave 2 Access Points a lot.
Yes, make no mistake the affect of the 802.11ac Wave 2 standard is going to be global and won’t just affect specific business areas.
One key part of Wave 2 802.11ac technology that helps keep your organization ahead of the capacity crunch is multi-user MIMO (MU-MIMO).
(MU-MIMO allows an access point to transmit to multiple clients at the same time, instead of sending data to a single client at a time. These parallel transmissions improve RF efficiency when client devices also support 802.11ac Wave 2.)
With Muti-User MIMO (MU-MIMO), 802.11ac Wave 2 clients are on and off the network so fast allowing for more legacy clients to be served. Plus 802.11ac Wave 2-enabled smart phones, laptops and tablets, will jump on the 5Ghz band leaving the 2.4GHz bands for older devices.
With the higher speeds of 802.11ac Wave 2, it takes a lot less time to transmit data than it did with previous Wi-Fi standards. This preserves battery life on Wave 2 clients. That means in the long run, updating your wireless network to 802.11ac Wave 2 standards will provide a better user experience for your users.
Now, let’s look at why 802.11ac Wave 2’s Impact is World Wide.
Schools need to support 802.11ac Wave 2 because more and more students are bringing devices to class. And it’s not to sneak a peek at the latest Taylor Swift video; educators are using tablets and other mobile devices as part of the education process. While additional devices and apps that will consume bandwidth are a big reason for the upgrade, it’s not the only thing. Schools need an 802.11ac Wave 2 network that can:
• Support up-to-the minute notification on mobile devices.
• Detect externally launched attacks and insider threats.
• Automatically adapts to environment changes for optimal performance.
Whether you’re a small coffee shop or a large department store, it’s not just your workers that need exemplary Wi-Fi, customers demand this service too. Cisco Aironet Access Points are great tools to gather data in order to understand customer traffic patterns and behaviors, prioritizing your business-driving apps and better protecting the privacy of your business. Your customers need to be able to jump on a network too and:
• Connect to a custom guest access network (which can be used as another advertising venue).
• Be able to find the things that they want, quicker.
• Adapt to flash crowds during sales events.
In the old days, putting out an array of stale donuts in the morning and offering travelers a bed for the night was the peak of hospitality luxury. Those days are long gone as guests are now a bit savvier than they once were and expect a multitude of high-end services. One of these services is a robust wireless network. If you’re in the hospitality game, you need an 802.11ac Wave 2 compliant network because:
• It delivers mobile check-in, key lock and room control
• It quickly deploys wireless access for conventions and social gatherings
• It adapts to crowd surges during high volume of registration
Where Does Cisco Fit In?
That third bullet brings me to one of the most amazing things about the Cisco Aironet Access Points, and that are the innovations that only Cisco delivers:
• Flexible Radio Assignment automatically adjusts radio bands to better serve the environment. A Cisco Aironet Access Point deployed in a hotel lobby can handle a crowd of people armed with mobile devices frantically looking to get settled in their rooms. Flexible Radio Assignment automatically triggers the access point to shift from the dual radios operation at 2.4GHz and 5GHz to both radios offering 5GHz.
• Cisco CleanAir remediates device impacting interference
• Optimized Roaming intelligently connects the proper access point as people move
• Multi-Gigabit Uplinks provides faster wired network offload on existing Ethernet
Your Cisco 802.11ac Wave 2 access points aren’t static. They offer investment protection via the ability to expand along with your organization with three ports located on the Cisco Access Point. A smart antenna port allows you to add either another antenna be it of the Stadium Panel, Directional or Location variety. A built-in module port is perfect for connecting hardware such as a video surveillance device. While a USB port allows you to add a Bluetooth capabiities.
Preparing for 802.11ac Wave 2 is not a one-sized-fits-all solution. Cisco has a wide access point portfolio that offers different solutions to fit different situations. The Cisco Aironet 1830 and 1850 Series Access Points are perfect fits for small to medium-sized businesses. These devices offer the functions and features of an enterprise-level access point and they are the lowest cost 802.11ac Wave 2 AP on the market today.
For mission-critical organizations, look no further that Cisco Aironet 2800 Series Access Point. More robust than the Cisco Aironet 1830 and 1850 Access Points, the 2800 Series is built for large sized organizations. Rounding out the portfolio is the Best-in-Class solution: the Cisco Aironet 3800 Access Point. This product is targeted specifically for larger areas such as stadiums and arenas.
In this article we will talk about the Antennas for Cisco Aironet Wi-Fi Access Points.
We know that Cisco Aironet 802.11n access points include the Cisco Aironet 1260 Series, 1600e Series, 2600e, 3500e Series, 3600e Series, and 1550 Series. These access points require the use of external antennas to make them fully functioning units. Cisco has developed antennas specifically designed for use with 802.11n access points to optimize performance.
Options for Every RF Environment
You can order Cisco Aironet 802.11n and 802.11ac access points with built-in antennas or with RF ports for connecting to external antennas. External antennas can improve your wireless coverage and data rates in certain situations. For example, building materials, floor layouts, distances, and usage patterns sometimes require concentrating radio signals in particular directions or at certain angles to get the fastest data throughput.
An extensive family of single-and dual-band antennas and mounting options for use with Cisco Aironet 802.11n and 802.11ac access points helps you optimize wireless performance in each unique situation (Table: Types of Available Wi-Fi AP Antennas* and Typical Uses). Indoors. Outdoors. Around corners. In open areas. Down hallways and mine shafts. And in places where aesthetics are important.
Types of Available Wi-Fi AP Antennas* and Typical Uses (See the Top Figure)
• Improve wireless data throughput
• Match radio signal strength to desired coverage patterns and building layouts
• Manage performance of dualband implementations (5 GHz and 2.4 GHz) with full MIMO support
• Get the most out of your 802.11n and 802.11ac access point investments
Why Choose Cisco for your Wi-Fi AP antenna needs?
There are many good reasons for turning to Cisco for your Wi-Fi AP antenna needs:
• Cisco antennas go through complete electrical, mechanical, and environmental testing.
• All Cisco wireless network features are tested with Cisco antennas to help ensure consistent, repeatable performance. Examples of these wireless features are the Cisco radio resource management (RRM), Cisco CleanAir, rogue access point detection, and location services.
• Cisco antenna patterns are integrated with Cisco management and location systems. That means your Cisco Prime Infrastructure and Mobility Service Engine (MSE) will display accurate signal coverage maps and correctly locate clients and unauthorized devices. That’s not possible with third-party antennas.
• You get the full support of the Cisco Technical Assistance Center (TAC) when you use Cisco antennas.
More Related Cisco Aironet Wi-Fi Access Points:
FCC 14-30 is a hot topic these weeks. In early June 2016, the FCC published FCC 14-30 Order, which now allows the use of three additional channels (120, 124, and 128) as well as other power adjustment and updated DFS regulations. Cisco’s compliance with new rules requires the assignment of hardware to a regulatory domain, indicating which rules the device complies.
In the following part, let’s read the reviews written by Jim Florwick (a member of the Technical Marketing Engineering team for Cisco's Wireless Business Unit). He talked about Why “It’s Okay to Mix Cisco Access Points”
Don’t Sweat the Small Stuff: It’s Okay to Mix Cisco Access Points
The new –B regulatory domain was designed to take the place of –A so that access points will be compliant with the FCC 14-30 Order. Per the FCC order, access points shipped before June 1, 2016 are grandfathered to adhere to –A requirements. Access points shipped after the June 1 date must meet the –B requirements. This includes changes in DFS detection requirements, which must re-certify according to the new rules.
I’ve been hearing from a lot of customers who don’t want to mix the two regulatory domains in their networks. But there simply is no reason not to do so.
There are a few nice things in a –B access point that aren’t available in an –A access point. Things that we all want: more 5 GHz channels and more power in U-NII 1. However, other than those minor changes, the –B and –A access points are the same. There are absolutely no operational issues in running both –A and –B on the same controller or controllers.
For example, let’s say you’re adding some access points or building out a new area – and you mix –A and –B access points, what will happen in terms of operations?
If the new channels aren’t added to the DCA list—and by default, they are not—they will not be assigned to any of the –B capable access points. If the new channels are added to the DCA list, it will only be assigned to the –B access points. This won’t be a problem as the clients will still use 120, 124, 128 where it’s available.
I have been in this industry for a long time and I’m not aware of any clients that support U-NII 1, 2, 3 that have failed in these channels. If, for some reason this does happen, simply remove the channels. No harm, no foul.
That leaves different allowed transmit (TX) power. There will be no issues here either – since TPC still works the same as it always has. The Cisco access point product line still operates with a mix of allowed powers in the 5 GHz UNII bands under the –A rules. The Neighbor Discovery Protocol is normalized for this reason and Radio Resource Management (RRM) works just fine. There are no known issues with mixing –B and –A radios in the same air on the same controller. If a user wants to stay consistent about power implications, simply set TPC Max to enforce max power to –A globally and in RF Profiles when in use.
In the last sentence I talked about consistency, and there are a lot of customers—myself included—that just don’t like the idea of a mixing anything. I go so far as to stay away from milkshakes and just eat ice cream cones, when I want a cool treat. But the reality is this is not like mixing Cisco Aironet 1130 and Aironet 3700 Access Points in the same room. Once your –A and –B access points are plugged in and running no one would ever know that a mix existed.
We don’t have operational hiccups absorbing this change like some of our other competitors. At Cisco, we’ve been running mixed environments in Alpha production networks since the Cisco AP 1810 was in development—and that’s a fair amount of time to find irregularities and observe errors. Cisco Mobility Express is built on a –B access point, and supports the –A access points. These devices have been tested over thousands of hours and work as expected.
There is really no reason other than just the perception of a mix to be worried. With that being said, I’m heading down to the ice cream shop and enjoying a frosty milkshake. I hear that they’re really great!
…The original article from http://blogs.cisco.com/wireless/dont-sweat-the-small-stuff-its-okay-to-mix-cisco-access-points
More Cisco Wireless Topics you can read here: http://blog.router-switch.com/category/technology/wireless/