replace the primary wlc in ha setup

As part of this feature, a mechanism is provided to convey the status of Bulk Sync (both AP and client sync) when standby WLC comes up. Step 4. Use the CLI: config ap image predownload primary all. Figure 17 Redundancy GW-Reachability Statistics, Figure 18 Redundancy Config-Sync Statistics. Copy the target image into your TFTP directory and go to the Web UI on your wireless LAN Controller. If you do not do this it cannot be changed after pairing. In this example, WLC 1 is configured as Primary and WLC 2 is configured as Secondary. This document introduces the Cisco 5520 Wireless LAN Controller (WLC), and provides general guidelines for its deployment. At this stage both the controllers are paired up in HA setup. Should i be afraid that the old AP's connected wont be supported on the newest IOS release? Enter yes in order to enable HA, which is followed by the configuration of the Primary/Secondary Unit and the Redundancy Management and Peer Management IP Address. It is important to use different sets of switches for the RP port connectivity and the management port traffic. Complete these steps in order to check the redundancy status: For Management - SNMP MIB is part of - MIB CISCO-LWAPP-HA-MIB.my is updated to capture the statistics discussed below. The WLC in the Standby state does not need to be configured independently as the entire configuration (Bulk Configuration while boot up and Incremental Configuration in runtime) will be synced from the Active WLC to the Standby WLC via a Redundant Port. This command should be executed from the Active WLC. Select the method of creating a USB flash drive, and then click Next. Once config is bulk-synced the primary unit is now in HOT STANDBY. The new architecture for HA is for box-to-box redundancy. High availability (HA) in WLC 7.3 Release - An Introduction 1. Here are my notes from the procedure: Thanks for the very detailed steps and the capture of the observations. On primary controller, disable SSO using the command: The Active and Standby WLCs reboot once this command is executed. Using this command will reboot both devices. This command will trigger a manual switchover where the Active WLC will reboot and the Standby WLC will take over the network. The service port state will be synced from the Active WLC to the Standby WLC. Configure Catalyst 9800 Wireless Controllers in High Availability (HA Step1: Configure both WLC's and just make sure the hostname and IP address used for management and the dynamic interfaces are different. 8. 8. I have two WLC 5508 controllers running in SSO HA Pair. As part of this enhancement, Static CAC method bandwidth allocation parameters for Voice and Video and Call Statistics are synced to the Standby WLC, so that soon after a switchover, respective information is available on the new active controller that will be used for call admission control. Mismatch may result in Maintenance Mode. The documentation set for this product strives to use bias-free language. Only on failure of both Active and Standby WLCs in the HA setup will the APs fall back to Secondary and further to Tertiary WLCs. This information is displayed when the user queries for the Peer statistics on the active WLC. Updated: November 11, 2022 Bias-Free Language Meet Cisco Product overview And Cisco Embedding Wireless Controller (EWC) turn Catalyst Access Total is a software-based controller integrated into Cisco Catalyzers 9100 Access Points. The target image will be shown as the default image and will be loaded on the next reload. Cisco 5508 WLC HA Datacenter Migration Notes - Blogger By going to Monitor TAB on the controller and then choosing Redundancy, you can Monitor Statistics. This results in the reset of the Standby WLC first, followed by the reset of the Active WLC. To avoid such conditions triggering false-positives, the new design ensures not to take switchover decisions purely based on ICMP ping losses. During the next reboot after role determination, it will validate the configuration again, report no XML mismatch, and process further in order to establish itself as the Standby WLC. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Same can be achieved through the CLI command: 1. High Availability (SSO) Deployment Guide 5508 - Academia.edu 2. Check the WLAN summary and Interface summary on standby WLC from console connection. Note: 5508, 7500, 8510 and WiSM-2 are supported up to release 8.5. Once SSO is enabled, it will reboot the WLCs. Note: Observe that the prompt in this example changed from 5508-Standby to 5508. Upgrade the WLC in HA Setup Upgrade Procedure in HA Setup Important Guidelines before Initiating a WLC Upgrade in HA Setup Download/Upload Facts in HA Setup Failover Process in the HA Setup Steps to Simulate Box Failover HA Facts Maintenance Mode SSO Deployment with Legacy Primary/Secondary/Tertiary HA SSO Deployment in Mobility Setup Clear configuration on the Active WLC will also initiate clear configuration on the Standby WLC. When both anchor and foreign controllers are running version 7.5 or higher, roamed clients are not impacted and the peer sends back the AP list, shun list, and Infrastructure MFP keys to the new active controller upon receiving a switchover message.In a mobility group that has a mix of WLCs running versions lower than 7.5 which supports HA (7.3 and 7.4) and WLCs running versions 7.5 or higher, when a switchover occurs, the roamed clients will be cleaned up on both the anchor and foreign WLCs. - If the new WLC has a lower AP count than the previous, the 90-day counter is not reset. In High Availability setup, APs CAPWAP state in maintained on Active as well as Standby controller (only for APs which are in Run state) i.e. This avoids the extra step of comparison and reboot since no other modules are initialized yet, resulting in faster pair up of Active and Standby WLCs. The following new CLI command is added to configure the number of redundancy keep-alive retries in the range of 3 to 10. How To Upgrade WLC In HA Setup - Cisco Community Save the configuration on the controller. Navigate to the download page located at Commands -> Download File and download the image to the active controller. New Commands on Active WLC to display peer process System, CPU and memory statistics are as follows: MIB CISCO-LWAPP-HA-MIB.my is updated to capture these statistics. How To Install Windows 11 In Legacy BIOS Mode On Your PC Upgrading WLC 5508 HA setup : r/networking - Reddit Back-to-back Redundancy Port (RP) connectivity between the two WLCs, Redundancy Management Interface (RMI) connectivity to check peer and management gateway reachability. Question 8. Configure the WLC with the same subnet management IP addresses as the previous WLC. The active controller will still reboot before going to MTC mode. Observe the AP UP Time and Association UP Time on Active WLC. Enter the IP Address for both interfaces, and click Apply. It is recommended that you use DHCP address assignment for the service port in the HA setup. Cisco Wireless LAN Controller Redundancy Solutions: High Availability Observe the AP Uptime and Association UP Time on Standby WLC will be in sync with active WLC. If WLC cannot discover its peer within this time it will transition its state to maintenance mode. With new the WLC coming up, HA SKU at the time of paring will get the AP Count: 1. The default Keepalive timer is 100 milliseconds. Like on other WLC, WLC 3504 supports both AP SSO and Client SSO. You can monitor the progress with the command show ap image all. Once configured, click Apply. Once the Active WLC MAC address is synced as the Mobility MAC address, the same MAC is used in mobility configuration on all the controllers in the mobility setup. Cisco Wireless LAN Controller (WLC) Configuration Best Practices In order to keep the mobility network stable without any manual intervention and in the event of failure or switchover, the back-and-forth concept of Mobility MAC has been introduced. 3. Just come across this problem and I have already found the solution. The administrator fetches the status and health information of Active and Standby WLCs separately to monitor and maintain the controllers on a continuous basis with the help of management infrastructure and various user interfaces. This is the same topology as was supported in controller release 7.3. The sleeping client database was not synced to the standby controller, which caused the sleeping clients to re-authenticate after a switchover occurred. AP SSO is supported on 5500/7500/8500 and WiSM-2 WLCs. 2. 10. 11. 4. Bulk configuration during boot up and incremental configuration are synced from the Active WLC to the Standby WLC using the Redundant Port. It also needs to be configured so that 9.6.61.23 is the Redundancy Management IP Address of WLC 2 and 9.6.61.21 is the Redundancy Management IP Address of WLC 1. Ha Sso Deployment Guide Thank you for sharing your experience with us after the move. With new WLC coming up, HA SKU at the time of paring will get the AP Count: If the new WLC has a higher AP count than the previous, the 90-day counter is reset. Each WLC has its own unique MAC address, which is used in mobility configuration with an individual controller management IP address. Refer to Cisco Technical Tips Conventions for more information on document conventions. If the WLC mobility peer version is older than 7.3, which does not support HA, this problem does not exist. 5. Keepalive and Peer Discovery timers should be left with default timer values for better performance. In this case, the client on the Active WLC will be de-authenticated and join back on the new Active WLC. Preferred MTU on Redundancy Link is 1500 or above. Turn off secondary. This guide provides information on the theory of operation and configuration for the Cisco Unified Wireless LAN Controller (WLC) as it pertains to supporting stateful switchover of access points and clients (AP and Client SSO). To address the variable network latencies in different customer deployment scenarios, keep-alive and peer-search parameters are made configurable. This document article focuses on HA SSO in versions 16.x. Failure to do so results in an active-active scenario if the L2 switch reloads, causing the APs to lose connectivity, leading to downtime to clients. 2. AP-count license information will be pushed from Active to Standby. This generates an event in msglog / syslog and message snippet is as follows: This message can be viewed on the Standby WLC by executing the CLI show msglog . It will not disconnect connected APs. Step 3. Also, once the Peer WLC transitions to the Standby Hot state, -Standby keyword is automatically appended to the Standby WLCs prompt name. In this example, WLC 1 is in an Active state and serving the network, and WLC 2 is in a Standby state monitoring the Active WLC. All download file types like Image, Configuration, Web-Authentication bundle, and Signature Files will be downloaded on the Active WLC first and then pushed automatically to the Standby WLC. Do they get transferred back from the secondary to the primary? HA between two WLCs can also be enabled from the configuration wizard. 2. Enabling SSO will reboot the WLCs in order to negotiate the HA role as per the configuration performed. By the modified logic, upon 6 consecutive ping drops, an ARP request is sent to the GW IP address. In the HA setup, the AP's CAPWAP state is maintained on the Active WLC as well as the Standby WLC (only for APs which are in a Run state). Currently, the controller does not provide any indication for the completion of Bulk Sync configuration once it is initiated. The Bulk Sync can be verified only by user observation and by manually checking the number of clients synced to the standby WLC. A successful response to this request is considered as the GW being reachable. In this example, WLC 1 is an Active WLC, WLC 2 is in a Standby state, and the AP database is maintained on both the WLCs. If the new WLC has a lower AP count than the previous, the 90-day counter is not reset. From this point onwards, GUI/Telnet/SSH for WLC 2 on the management interface will not work, as all the configurations and management should be done from the Active WLC. Is that correct? The Active/Standby WLC is decided based on HA SKU (Manufacturing Ordered UDI) from release 7.3 onwards. Initially WLC configured, as Secondary will report XML mismatch and will download the configuration from Active and reboot again. Also, in order to configure the route on the Standby WLC for out-of-band management on the service port, issue the configure redundancy peer-route add command from the Active WLC. Release 7.3 only supports AP SSO that will ensure that the AP sessions are intact after switchover. With versions 7.5 and above, AP/Client SSO supports synchronization of L3 MGID between active and standby controllers. It is important to make sure that physical connections are up between both the controllers (that is, both the WLCs are connected back to back via the Redundant Port using an Ethernet cable) and the uplink is also connected to the infrastructure switch and the gateway is reachable from both the WLCs before SSO is enabled. Step 2. As part of this enhancement, the maximum number of Keepalives between active and standby controllers to trigger a failover is now configurable. In AP SSO deployment controller running higher permanent count licenses should be configured as primary unit. PMIPv6, NBAR, SIP static CAC tree are not synced, need to be re-learned after SSO. Make sure to check your mobility group as the new pair will use the MAC address from the replacement primary and not the active secondary. Will i just upload the FUS and IOS to the primary WLC, and start the upgrade? In this mode WLC cannot communicate to infra network and will not participate in HA process. WLC 1: Make sure Local state should be Active and Unit should be Primary on WLC 1 after switchover: Observe the switchover history. Maintenance Mode is discussed later in this document. In release 8.0 and later, Internal DHCP Server is configured on HA enabled controllers and this data is synced to the standby WLC so that soon after a switchover, the Internal DHCP Server on the new active controller starts serving clients. In order to lower AP count after switchover, the WLC offset timer will continue and nagging messages will be displayed after time expiry. Raghavendra Dhanapuram's Post - LinkedIn If there is no response to the ICMP message, the Standby WLC gets aggressive and immediately sends another Keepalive message to the Standby WLC and expects an acknowledgment in 25% less time (that is, 75 msec or 25% less of 100 msec). Primary and secondary Stateful HA is licensed and settings are synchronized.Export the current firewall settings by navigating to System | Settings and then click on the export settings button, which will be needed in the event of replacing a Primary . The RTT should be 80% of the Keepalive timer which is configurable in the range 100-400 milliseconds. 9. Primary WLC connected to one 6500 and the Stand-by WLC to the other 6500. Sleeping client information is not synced to the standby controller. Note: In the above equation, 3 is the Keepalive retry count, 100 is the Keepalive timer, and 60 is3*10 + 3*10 (3 RMI pings to peer + 3 pings to gateway). CIMC Upgrade - WLC in HA | mrn-cciew Client SSO does not support seamless transitions for clients that are in the process of associating/joining the controller. HA SKU is a new SKU with a Zero AP Count License. This CLI command will only work if the WLC which is intended to work as Standby has some number of permanent license count. After HA is enabled, if the static IP is configured for service port, WLC loses the service port IP and it has to be configured again. This command will trigger manual switchover where Active controller will reboot and Standby controller will take over the network. This MAC address is synced from the Active WLC and should be used in mobility configuration. configure interface address management 9.5.56.2 255.255.255.0 9.5.56.1, configure interface address redundancy-management 9.5.56.10 peer-redundancy-management 9.5.56.11, configure interface address management 9.5.56.3 255.255.255.0 9.5.56.1, configure interface address redundancy-management 9.5.56.11 peer-redundancy-management 9.5.56.10. Shutdown the AP-manager of the first WLC so AP reboot and associate with the second WLC 3. The standby controller, when it comes back after the reboot, has the same IP address on interfaces as the primary controller and all the ports disabled. A WLC with HA SKU UDI will always be the Standby WLC for the first time when it boots and pairs up with a WLC running a permanent count license.
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replace the primary wlc in ha setup 2023