Cisco Systems OL-17037-01 manual Configuring Failover Priority for Access Points, 1300

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Chapter 7 Controlling Lightweight Access Points

Configuring Failover Priority for Access Points

Information similar to the following appears for the show advanced timers command:

Authentication Response Timeout (seconds)

10

 

Rogue Entry Timeout (seconds)

1300

AP Heart Beat Timeout (seconds)

30

 

AP Discovery Timeout (seconds)

10

 

AP Local mode Fast Heartbeat (seconds)

10

(enable)

AP Hreap mode Fast Heartbeat (seconds)

disable

AP Primary Discovery Timeout (seconds)

120

 

 

 

 

Configuring Failover Priority for Access Points

Each controller has a defined number of communication ports for access points. When multiple controllers with unused access point ports are deployed on the same network and one controller fails, the dropped access points automatically poll for unused controller ports and associate with them.

In controller software releases prior to 5.1, the backup controllers accept association requests in the order the requests are received until all the ports are in use. As a result, the probability of an access point finding an open port on a backup controller is determined by where in the association request queue it is after the controller failure.

In controller software release 5.1 or later, you can configure your wireless network so that the backup controller recognizes a join request from a higher-priority access point and if necessary disassociates a lower-priority access point as a means to provide an available port.

Note Failover priority is not in effect during the regular operation of your wireless network. It takes effect only if there are more association requests after a controller failure than there are available backup controller ports.

To configure this feature, you must enable failover priority on your network and assign priorities to the individual access points. You can do so using the controller GUI or CLI.

By default, all access points are set to priority level 1, which is the lowest priority level. Therefore, you need to assign a priority level only to those access points that warrant a higher priority.

Using the GUI to Configure Failover Priority for Access Points

Using the controller GUI, follow these steps to configure failover priority for access points that join the controller.

Step 1 Click Wireless > Access Points > Global Configuration to open the Global Configuration page (see Figure 7-16).

 

Cisco Wireless LAN Controller Configuration Guide

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OL-17037-01

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Contents Controlling Lightweight Access Points Guidelines for Using Capwap Access Point Communication ProtocolsController Discovery Process Page Config network master-base enable Verifying that Access Points Join the ControllerConfig network master-base disable Viewing Capwap MTU Information Configuring Global Credentials for Access PointsDebugging Capwap Global Configuration All APs Details for Credentials Show ap config general CiscoAP Save configShow ap summary Configuring Authentication for Access Points Lwapp ap dot1x username username password passwordUsing the GUI to Configure Authentication for Access Points ControllerCisco Wireless LAN Controller Configuration Guide Using the CLI to Configure Authentication for Access Points Config ap dot1xuser add username user password password allConfig ap dot1xuser disable all CiscoAP AP Dot1x User Mode field shows CustomizedEmbedded Access Points Configuring the Switch for AuthenticationDns-server ipaddress Default-router ipaddress Ip dhcp pool poolnameAutonomous Access Points Converted to Lightweight Mode Reverting from Lightweight Mode to Autonomous Mode Using a Controller to Return to a Previous ReleaseAuthorizing Access Points Using SSCs Authorizing Access PointsAuthorizing Access Points Using MICs Authorizing Access Points Using LSCs Using the GUI to Configure LSCConfig certificate lsc ca-cert add delete Config certificate lsc enable disableConfig certificate lsc ca-server http//urlport/path Config certificate lsc other-params keysizeConfig certificate lsc ap-provision revert-cert retries Config certificate lsc ap-provision auth-list add APmacaddrShow certificate lsc summary Using the GUI to Authorize Access Points Show certificate lsc ap-provisionConfig auth-list add mic ssc lsc apmac apkey Using the CLI to Authorize Access PointsConfig auth-list ap-policy mic ssc lsc enable disable Show auth-listUsing Dhcp Option 43 and Dhcp Option Troubleshooting the Access Point Join ProcessControlling Lightweight Access Points Show ap config global Configuring the Syslog Server for Access PointsViewing Access Point Join Information Show ap join stats summary allJoined Converted Access Points Send Radio Core Dumps to Controller Debug ap enable disable command cmd CiscoAPUsing the GUI to Upload Radio Core Dumps Using the CLI to Retrieve Radio Core DumpsShow ap crash-file Using the CLI to Upload Radio Core Dumps Transfer upload startUploading Memory Core Dumps from Converted Access Points Using the GUI to Upload Access Point Core DumpsDisplay of MAC Addresses for Converted Access Points Using the CLI to Upload Access Point Core DumpsSupporting Oversized Access Point Images Config ap reset-button enable disable ap-nameallCisco Workgroup Bridges WGB ExampleGuidelines for Using WGBs Configure terminal Using the GUI to View the Status of Workgroup Bridges Sample WGB ConfigurationShow dot11 association 11 Clients Detail 12 WGB Wired Clients Debug dhcp message enable Debug dhcp packet enable Using the CLI to View the Status of Workgroup BridgesUsing the CLI to Debug WGB Issues Debug dot11 mobile enable Debug dot11 state enableConfiguring Backup Controllers Using the GUI to Configure Backup Controllers 14 Global Configuration15 All APs Details for High Availability Using the CLI to Configure Backup Controllers Config advanced timers ap-discovery-timeout interval Config advanced timers auth-timeout intervalConfiguring Failover Priority for Access Points 130016 Global Configuration Using the CLI to View Failover Priority Settings EnabledConfiguring Country Codes Guidelines for Configuring Multiple Country CodesUsing the GUI to Configure Country Codes 19 All APs Details for Advanced Show country supported Using the CLI to Configure Country CodesShow country Show country channels Config 802.11a enable network config 802.11b enable network Controlling Lightweight Access Points Guidelines for Migration Migrating Access Points to the -U Regulatory DomainConfig country J3 Show ap migrateConfig ap migrate j52w52 all apname Using the W56 Band in Japan Dynamic Frequency SelectionOptimizing Rfid Tracking on Access Points Using the GUI to Optimize Rfid Tracking on Access Points20 802.11b/g/n Cisco APs Configure Config ap monitor-mode tracking-opt CiscoAP Using the CLI to Optimize Rfid Tracking on Access PointsConfig 802.11b enable CiscoAP Config advanced probe limit numprobes interval Configuring Probe Request ForwardingConfig advanced probe filter enable disable Show ap monitor-mode summaryInventory Performing a Link Test 22 All APs Details for InventoryUsing the GUI to Perform a Link Test Link Test Configuring Link Latency Using the CLI to Perform a Link TestUsing the GUI to Configure Link Latency 25 All APs Details for AdvancedUsing the CLI to Configure Link Latency Config ap link-latency enable disable CiscoAP allConfiguring Power over Ethernet Config ap link-latency reset CiscoAPUsing the GUI to Configure Power over Ethernet EPoE Power EPoE Mode 15.4 W Optimized 20 WCisco Wireless LAN Controller Configuration Guide Config ap power injector enable CiscoAP all installed Using the CLI to Configure Power over EthernetConfig ap power injector enable CiscoAP all override Debug ap command led flash seconds CiscoAP Configuring Flashing LEDsUsing the GUI to View Clients Viewing ClientsControlling Lightweight Access Points Viewing Clients 28 Search Clients 29 Clients Detail Using the CLI to View Clients AP MACS69 OL-17037-01