Connect with console to it and check which state it is in. Follow these guidelines when configuring your system to SSO mode: You must use identical Cisco IOS images on the supervisor modules to support SSO mode. If it is in ROMMON, try boot with manual "boot" command. HSRP is SSO aware on interfaces that are configured for HSRP and the standby RP is automatically reset. This chapter consists of these sections:. In this CCNP ENCOR lesson, we will focus on this redundancy mechanism. = 0 Last switchover reason = active unit removed Hardware Mode = Duplex Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode =. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. 0. Check if There is Sufficient Available Memory on Flash 4. Note • The two Gigabit Ethernet interfaces on the redundant supervisor engine are always active unless you enter the fabric switching-mode allow dcef-only command. Note Enabling SSO initiates a controller reboot. 2(20)EWA and later releases. From both WLC GUIs or CLIs, one can perform simple connectivity tests,. You can use the switch switch-number role command to set the active and standby switch in 1:1 stack mode. With RPR+, the redundant supervisor engine is fully initialized and configured, which shortens the. Step 5: end. 2. The switch is supports route processor redundancy (RPR). 2. (RTU Evaluation License by now) - Network Connection beween the WLC5520: LAG. Step 5. It is not recomended to configure RA (Registration Authority) as it is not validated. Step 2 Router(config-red)# mode sso Configures SSO. (See the “Performing a Software Upgrade” section on page 8-12. Step 5. For Enterprise Services or IP Base mode, use ISSU to upgrade software for both RPR and SSO redundant mode. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. 3. Router (config-red)# mode sso. In software, supervisor engine redundancy is enabled by running the redundant supervisor engine in route processor redundancy (RPR) or stateful switchover (SSO) operating. 133，稱為WLC2。. Step 4. Combined. mode sso. Further, if the active RP fails, no change occurs to the HSRP group itself and traffic continues to be forwarded through the current active gateway device. 2(20)EWA and later releases. running with image version 8. SSO is supported in Cisco IOS Release 12. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. Enters redundancy configuration mode. Step 4. HA_CONFIG_SYNC-6-BULK_CFGSYNC_SUCCEED: Bulk Sync succeeded Switchover Process Restrictions. To reload the standby switch if a parser return code (PRC) failure occurs during configuration synchronization, use the policy config-sync reload command in redundancy configuration. Maintenance Mode = Disabled. 3 allows the AP to establish CAPWAP tunnel with Active WLC and share mirror copy of AP database with Standby WLC. NSF and SSO must be configured before attempting an ISSU. The software upgrade procedure supported by supervisor engine redundancy allows you to reload the Cisco IOS software image on the redundant supervisor engine, and once complete, reload the active supervisor engine. Check the Current ISSU and Install States 7. Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode = Disabled Communications = Up Current Processor Information :----- Active Location = slot 1/2 Current Software state = ACTIVE Uptime in current state = 36 minutes Image Version = Cisco IOS Software, s2t54 Software (s2t54-ADVENTERPRISEK9-M),SSO is supported in Cisco IOS Release 12. Redundancy may not work due to differences between the Cisco IOS releases. Usage Guidelines. Redundancy may not work due to differences between the Cisco IOS. In software, supervisor engine redundancy is enabled by running the redundant supervisor engine in route processor redundancy (RPR) or stateful switchover (SSO) operating mode. Follow these guidelines when configuring your system to SSO mode: You must use identical Cisco IOS images on the switches in the stack to support SSO mode. Step 5:. Step 4: mode sso. End with CNTL/Z. 10. Step 4. 61 /22. When a redundant supervisor engine runs in SSO mode, the redundant supervisor engine starts up in a fully-initialized state and synchronizes with the persistent configuration and the running configuration of the active supervisor engine. The software upgrade procedure supported by supervisor engine redundancy allows you to reload the Cisco IOS software image on the redundant supervisor engine, and once complete, reload the active supervisor engine. Step 3. Hardware Mode = Simplex. Configuraties. What can be the reason. Router(config-red)# mode sso. 2 (11)BC3. Device # show redundancy Redundant System Information : ----- Available system uptime = 6 days, 9 hours, 23 minutes Switchovers system experienced = 0 Standby failures = 0 Last switchover reason = not known Hardware Mode = Simplex Configured Redundancy Mode = SSO Operating Redundancy Mode = SSO Maintenance Mode =. And the output of the "show redundancy" is: Hardware Mode = Duplex. Check the Current ISSU and Install States 7. Follow these guidelines when configuring your system to SSO mode: You must use identical Cisco IOS images on the supervisor modules to support SSO mode. Step 6. (Optional) Ensure network. 168. Note Enabling SSO initiates a controller reboot. We will definitely upgrade are fus code. Step 6. The configuration on the active controller is synched to the standby controller via the redundant port. To enter the redundancy main configuration submode and enable the standby switch, use the main-cpu command in redundancy configuration mode. When this command is entered, the redundant supervisor engine is reloaded and begins to work in SSO mode. If you perform an online insertion and removal (OIR) of the module, the switch resets during the. Enter configuration commands, one per line. Example: Device(config-red)# mode sso: Configures stateful switchover. Check if There is Sufficient Available Memory on Flash 4. 10. mode sso. Configures SSO. 0 10. The mode sso command can be entered only from within redundancy configuration mode. I am seeing the SSO is established. The DHCP high availability features are enabled by default when the redundancy mode of operation is set to SSO. Configures SSO. Redundancy may not work due to differences between the Cisco. After rebooting the primary controller changed into Maintanence Mode. Usage Guidelines. The mode sso command can be entered only from within redundancy configuration mode. Exits redundancy configuration mode and returns the switch to privileged EXEC mode. 2(20)EWA and later releases. Example: Device(config-red)# mode sso: Configures stateful switchover. Router(config-red)# end. Device # show redundancy Redundant System Information : ----- Available system uptime = 6 days, 9 hours, 23 minutes Switchovers system experienced = 0 Standby failures = 0 Last switchover reason = not known Hardware Mode = Simplex Configured Redundancy Mode = SSO Operating Redundancy Mode = SSO Maintenance Mode =. . end. Save the configuration on the controller. (CSCec05612)Catalyst 6500 Series Switch Cisco IOS Software Configuration Guide, Release 12. x. The ISSU feature allows deployment of new features, hardware, services, and maintenance fixes in a procedure that is seamless to end users. Step 5. Operating Redundancy Mode = sso. This feature also functions in an nonstop forwarding (NSF) and stateful switchover (SSO) environment. Hi! A custommer of mine tried to configure HA AP-SSO with two 5508 controllers. Step 5. Step 1. Hardware Mode = Duplex Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode =. x. Router# configure terminal Router(config)# redundancy Router(config-red)# mode sso Router(config-red)# exit Router# copy running-config startup-config ヒント Cisco Catalyst 6500 シリーズ スイッチの詳細（設定例およびトラブルシューティング情報を含む）については、次のページに示される. Cisco NSF with SSO allows for the forwarding of data packets to continue along known routes while the routing protocol information is being restored following a switchover. Sets the router in SSO redundancy mode. Note After configuring SSO mode, the standby RP will automatically reset. Redundancy Mode (Operational) = sso Redundancy Mode (Configured) = sso Split Mode = Disabled Manual Swact = Enabled Communications = Up client count = 29 client_notification_TMR = 30000 milliseconds keep_alive TMR = 9000 milliseconds keep_alive count = 1 keep_alive threshold = 18 RF debug mask = 0x0 Configuring BGP. Connected to network with 4x10G links. 2(20)EWA and later releases. Enter configuration commands, one per line. Step 3. Example: Device(config-red)# mode sso: Configures stateful switchover. There are three modes in redundancy for the standby supervisor when native Cisco IOS Software is used: RPR-The show module command displays Cold. Version 7. SSO HSRP. Step 5. cisco Systems, Inc. 3SE (Catalyst 3850 Switches) 8 OL-30686-01. The mode sso command can be entered only from within redundancy configuration mode. Step 4: mode sso. Step 5. SSO is supported in Cisco IOS Release 12. auto-sync standard. 102. What is stateful switch over? Stateful Switchover (SSO) is a redundancy feature that allows a Cisco device with two route processors to synchronise router configuration and control plane state information. “Configuring NSF with SSO Supervisor Engine Redundancy”). Check the Boot Mode 3. Router(config-red)# end. If the HA unit is not an HA sku, then you need a minimum of 50 ap license. Example: Device(config-red)# end: Exits redundancy configuration mode and. Operating Redundancy Mode = sso Maintenance Mode = Disabled Communications = Up Current Processor Information :-----Active Location = Switch 2 Current Software state =. Router(config-red)# end. Redundancy Mode (Operational) = Non-redundant Redundancy Mode (Configured) = sso Redundancy State = Non Redundant Maintenance Mode = Disabled Manual Swact = disabled (system is simplex (no peer unit)) Communications = Down Reason: Simplex mode client count = 103 client_notification_TMR = 30000 milliseconds RF debug mask = 0x0Go to solution. When this command is entered, the redundant supervisor engine is reloaded and begins to work in SSO mode. Enters redundancy configuration mode. Redundancy Mode (Configured) = sso Redundancy State = sso Maintenance Mode = Disabled Manual Swact = enabled Communications = Up client count = 115Operating Redundancy Mode = RPR. Step 4. スタック構成をしているものは電源を片方の電源を抜くとトラップはとぶのですが. Redundancy Mode (Configured) = sso . SSO HSRP alters the behavior of HSRP when a device with redundant Route Processors (RPs) is configured for stateful switchover (SSO) redundancy mode. Step 1. Management: 192. RPR+-The show module command displays Warm. Example: Device(config-red)# mode sso: Configures stateful switchover. their Capwap tunnel, APs and clients get disconnected. On the standby. Usage Guidelines. The SSO HSRP feature enables the Cisco IOS HSRP subsystem software to detect that a standby RP is installed and the system is configured in SSO redundancy mode. Router(config)# redundancy. 130，称为WLC1; 第二个地址为IP地址10. SSO is supported in Cisco IOS Release 12. Enters redundancy configuration mode. Example: Device (config-red)# mode sso: Configures SSO. Follow these guidelines when configuring your system to SSO mode: You must use identical Cisco IOS images on the switches in the stack to support SSO mode. Enter application redundancy mode. mode SSO Router(config)# mode SSO. mode sso. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. Redundancy may not work due to differences between the Cisco IOS releases. Initiate a switchover using the command redundancy force-switchover. My Secondary Switch is in disable state despite its in SSO mode. Example: Device(config-red)# mode sso: Enables the redundancy mode of operation to SSO. Check if Auto-Boot is Enabled 6. When this command is entered, the redundant supervisor engine is reloaded and begins to work in SSO mode. The routing protocols have been enhanced with NSF-capability and. Note After configuring SSO mode, the standby RP will automatically reset. SSO Operation. The software upgrade procedure supported by supervisor engine redundancy allows you to reload the Cisco IOS software image on the redundant supervisor engine, and once complete, reload the active supervisor engine once. Usage Guidelines. Step 4: mode sso. Example: Router(config)# redundancy Router(config-red)# Enters redundancy configuration mode. Cisco IOS XE Software, Version 17. Step 2. ”. The mode sso command can be entered only from within redundancy configuration mode. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. When two versions of Cisco IOS images are involved, the command sets supported by two images might differ. Communications = Up. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. Uptime in current state = 4 days, 21 hours, 27 minutesYes you need the RP in order to build SSO. 0. Enters redundancy configuration mode. Router(config)# redundancy. Router# show redundancy states. Enters redundancy configuration mode. For Enterprise Services or IP Base mode, use ISSU to upgrade software for both RPR and SSO redundant mode. In Cisco Wireless LAN Controllers, redundancy is achieved in two ways— n+1 and AP SSO redundancy. Device(config-red)# mode sso: Configures stateful switchover. Redundancy may not work due to differences between the Cisco IOS releases. SSO is supported in Cisco IOS Release 12. 90. mode sso. With NSF/SSO, peer networking devices do not experience routing flaps. Further, if the active RP fails, no change occurs to the HSRP group itself and traffic continues to be forwarded through the current active gateway device. Step 6. They will reboot again. Communications = Up . 0(22)S. Redundancy Mode Support in Cisco IOS Releases Platform Mode 12. mode sso. AP SSO set within the Cisco Unified Wireless Network software release v7. while restarting the secondary WLC that was in maintenance mode, check the "Bulksync status" of redundancy summary in primary WLC and wait for until it turn as. If the command is not found in. If a VSS does not meet the requirements for SSO redundancy, it will be incapable of establishing a relationship with the peer switch. Enters redundancy configuration mode. Follow these guidelines when configuring your system to SSO mode: You must use identical Cisco IOS images on the supervisor modules to support SSO mode. Follow these guidelines when configuring your system to SSO mode: You must use identical Cisco IOS images on the to support SSO mode. Step 3: end Example: Switch (config-red)# end Returns to EXEC mode. redundancy mode sso. Enters redundancy configuration mode. 2(20)EWA and later releases. The software upgrade procedure supported by supervisor engine redundancy allows you to reload the Cisco IOS software image on the redundant supervisor engine, and once complete, reload the active supervisor engine once. Cisco NSF works with the SSO feature. There are two options for Cisco Wireless Controller redundancy solutions, either Backup Controllers or High Availability, depending on the firmware version of WLC's, failover time requirement, and budget. For Enterprise Services or IP Base mode, use ISSU to upgrade software for both RPR and SSO redundant mode. Router(config)# mode sso. With RPR, the backup supervisor engine is partially initialized and must reload. The system has experienced 4 switchovers. 10. When an RP is active and the other RP is standby, SSO enables the standby RP to take over if the active RP fails. Device# show redundancy Redundant System Information : ----- Available system uptime = 6 days, 5 hours, 28 minutes Switchovers system experienced = 0 Standby failures = 0 Last switchover reason = none Hardware Mode = Duplex Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode = Disabled Communications = Up Current. mode sso. Router# show redundancy Redundant System Information :-----Available system uptime = 1 hour, 0 minutes Switchovers system experienced = 0 Standby failures = 1 Last switchover reason = none Hardware Mode = Duplex Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode = Disabled. Complete these steps in order to check the redundancy status: a. Router# copy running-config startup-config %HA-5-MODE:Operating mode is sso, configured mode is sso. (Cisco Controller) >show redundancy summary. Displays the operating redundancy mode. main. Switch(config)# redundancy Switch(config-red)# mode sso Switch(config-red)# end Switch# show redundancy Redundant System Information : -----Available system uptime = 2 days, 2 hours, 39 minutes Switchovers system experienced = 0. config redundancy mode sso on primary. Enters redundancy configuration mode. What is RPR redundancy?. Step 4. End with CNTL/Z. Cisco Stateful Switchover (SSO) is one of the redundancy mechanisms used in networking. Router# show redundancy Redundant System Information : ----- Available system uptime = 39 minutes Switchovers system experienced = 1 Standby failures = 0 Last switchover reason = user forced Hardware Mode = Duplex Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode = Disabled. #sh redundancy Redundant System Information :-----Available system uptime = 1 year, 7 weeks, 1 day, 2 hours, 8 minutes Switchovers system experienced = 0 Standby failures = 0 Last switchover reason = none. SSO pair connected to upstream HSRP active and standby and RP connected via upstream setNow, let’s focus on Cisco SSO Configuration and learn how to configure SSO on Cisco routers. 255. Communications = Up. auto-sync config-register. Communications = Up . Example: Router>enable Router#configure terminal Router(config)#redundancy Router(config-r)#mode none Router(config-red)#application redundancy Router(config-red-app)#group 1 Configure a name for the redundancy group. Router(config)# mode sso. 2016-10-12 10:10 AM 2017-09-01 03:01 AM 更新. Check if Switches are in SSO Mode 5. What is stateful switch over? Stateful Switchover (SSO) is a redundancy feature that allows a Cisco device with two route processors to synchronise router configuration and control plane state information. This example shows how to set the redundancy mode to SSO: Device (config)# redundancy Device (config-red)# mode sso Device (config. In Cisco Wireless LAN Controllers, high availability is achieved with redundancy. 3 and 7. Enter config redundancy mode SSO command to enable SSO. The processing of mirroring this information between route processors is known as checkpointing. 255. The problem is a version mismatch. debug redundancy {infra | facilitator. While implementing Nonstop Forwarding (NSF) technology in systems using SSO. Image Version = Cisco IOS Software, Catalyst L3 Switch Software (CAT9K_IOSXE), Experimental Version 16. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to privileged EXEC mode. Redundancy may not work due to differences between the Cisco. Permanent Virtual Circuits For ATM to support forwarding during and after switchover, ATM permanent virtual circuits (PVCs) must remain up not only within the networking device, but also within the ATM network. Redundancy Mode (Operational) = sso Redundancy Mode (Configured) = sso Consolidated Platform Configuration Guide, Cisco IOS XE 3. Enters redundancy configuration mode. 1. Step 6. = Non-redundant Redundancy Mode (Configured) = sso Redundancy State = Non. Step 5: exit. >> configure the IP of the redundancy management interface with: config interface address redundancy-management <new IP > <new IP for the peer redundancy management interface> This needs to be done on both of them using the console connection and then enable the SSO again as: >> config redundancy mode sso. Redundancy Mode (Operational) = sso . see. SSO-The show module command displays Hot. Step 4: mode SSO Example: Router(config)# mode SSO: Configures SSO. #sh redundancy Redundant System Information :-----Available system uptime = 6 days, 17 hours, 12 minutes Switchovers system experienced = 0 Standby failures = 0 Last switchover reason = none Hardware Mode = Simplex Configured Redundancy Mode = sso Operating Redundancy Mode = Non-redundant Maintenance Mode =. Step 2. The standby will sync its configuration from. It designates one of the RPs as the active RP and the other as the standby. Note • The two Gigabit Ethernet interfaces on the redundant supervisor engine are always active unless you enter the fabric switching-mode allow dcef-only command. Follow these guidelines when configuring your system to SSO mode: You must use identical Cisco IOS images on the switches in the stack to support SSO mode. Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode = Disabled Communications = Up Current Processor Information :----- Active Location = slot 1 Current Software state = ACTIVE Uptime in current state = 30 minutes Image Version = Cisco IOS Software [Fuji], Catalyst L3 Switch Software (CAT9K_IOSXE), Version 16. . Note Enabling SSO initiates a controller reboot. Example: Device(config-red)# mode sso: Enables the redundancy mode of operation to SSO. 130 pour le. In specific Cisco networking devices that support dual RPs, SSO takes advantage of RP redundancy to increase network availability. Step 4: mode sso. Reason: Software version. 2. Router# show running-config. For more information, see Chapter 1, “Route Processor Redundancy (RPR). Step 3: end. Example: Device (config-red)# mode sso: Configures SSO. Example: Device(config-red)# mode sso: Configures stateful switchover. Example: Device(config-red)# mode sso: Configures stateful switchover. 5. 1 Disabling SSO on HA Pair 1 On primary controller, disable SSO using the command: config. Step 5. Router# configure terminal. † If the switch is configured for SSO mode, and the active RP fails before the standby is ready toLACP and PAGP is not supported in HA mode in releases until, and including, Cisco IOS XE Gibraltar 16. Redundancy may not work due to differences between the Cisco IOS releases. Redundant System Information :----- Available system uptime = 44 weeks, 2 days, 6 hours, 12 minutes. core-7606-01#show redundancy . after reboot ASR can used single processer but, when I show redundancy configure still mode sso I used in config t and redundancy and default-exit and enter and save non reboot after then show config again config in redundacy mode none Bias-Free Language. For Enterprise Services or IP Base mode, use ISSU to upgrade software for both RPR and SSO redundant mode. mode sso. Since we couldnt afford downtime I rebooted standby controller that was in maintenance mode and it was able to boot in sso redundant mode. Step 6. and the redundant supervisor engine boots into a partially-initialized state in RPR mode and a fully-initialized state in SSO mode. The Supervisor 7-E card has four uplink ports on its front panel. Cisco NSF with SSO allows for the forwarding of data packets to continue along known routes while the routing protocol information is being restored following a switchover. The engine will synchronize the configuration and. For WLC 2, go to Console connection: Note Once SSO is enabled, the Standby WLC can be accessed via console connection or via SSH on the service port and on the redundant management interface. Step 3. Router# copy running-config. Dans cet exemple, la commutation avec état (SSO) haute disponibilité (HA) est configurée entre deux instances 9800-CL, qui exécutent la même version du logiciel Cisco IOS, qui ont été configurées avec des WMI séparés et avec une interface utilisateur graphique accessible à l'adresse. Cisco IOS Nonstop Forwarding (NSF) always runs with stateful switchover (SSO) and provides redundancy for Layer 3 traffic. SSO HSRP. This feature is not supported on the C9500-12Q, C9500-16X, C9500-24Q, C9500-40X models of the Cisco Catalyst 9500 Series Switches. Router> enable. Redundant System Information : Available system uptime = 53 minutes Switchovers system experienced = 0 Standby failures = 0 Last switchover reason = noneCisco Catalyst 9800 Series Wireless Controller Software Configuration Guide, Cisco IOS XE Cupertino 17. When this command is entered, the standby supervisor module is reloaded and begins to work in SSO mode. Step 4. Step 6. 2(20)EWA and later releases. Maintenance Mode = Disabled. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. 1. configure interface address redundancy-management 10. Cisco ASR1006 supports the stateful failover from an active Enhanced Services Processor (ESP) to a standby and from an active Route Processor to a standby on the same box. Step 4: mode sso. How To Configure Route Processor Redundancy. end. Step 4: show running-config Example:Router# show redundancy Operating mode is sso redundancy mode sso hw-module slot 6 image disk0:rsp-pv-mz hw-module slot 7 image disk0:rsp-pv-mz Active in slot 6 Standby in slot 7 The system total uptime since last reboot is 2 weeks, 23 hours 41 minutes. config redundancy mode sso. Step 5: Enabling SSO reboots the controllers to negotiate the HA role as per the configuration performed. 2. Step 5. Inbox redundancy with Stateful Switchover (SSO) mechanism provides redundancy within the same device. Here are the steps: Step 1 Clear the offending configuration (that caused an MCL) while the standby supervisor engine is in standby cold (RPR) state. 12. Cisco recommends that you are familiar with stacking, stackwise-virtual (SVL), and "bundle" Vs "install" boot mode related concepts on Catalyst 9K switches. Chapter 5 Configuring Supervisor Engine Redundancy Using RPR and SSO About Supervisor Engine Redundancy SSO supports stateful switchover of the following Layer 2 features. Router# configure terminal. Enters redundancy configuration mode. Step 5: end. Router# show redundancy Redundant System Information : ----- Available system uptime = 39 minutes Switchovers system experienced = 1 Standby failures = 0 Last switchover reason = user forced Hardware Mode = Duplex Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode = Disabled. Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode = Disabled Communications = Up. Note Enabling SSO initiates a controller reboot. Example: Router(config)# exit Example: Router # Enters redundancy configuration mode. Example: Device(config-red)# mode sso: Configures stateful switchover. # redundancy Switch(config-red)# mode sso Switch(config-red)# end Switch# show redundancy states my state = 13 -ACTIVE peer. Enters redundancy configuration mode. This feature is supported on all controller models supporting HA SSO feature: Cisco 8500 Series Controllers . When the controller works as a host for spanning tree, ensure that you configure portfast trunk in the uplink switch using. Step 4 Router# show redundancy states Displays the operating redundancy. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to privileged EXEC mode. 2(20)EWA and later releases. Redundancy may not work due to differences between the Cisco IOS releases. 6. Once you get them on the same version, you will be able to get to SSO. The default mode for the Cisco 12000 series routers is RPR. With RPR, the backup supervisor engine is partially initialized and. The default standby power supply slot is PS8. Step 3: end . Router# show redundancy Redundant System Information : ----- Available system uptime = 39 minutes Switchovers system experienced = 1 Standby failures = 0 Last switchover reason = user forced Hardware Mode = Duplex Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode = Disabled. 133，称为WLC2。. Remove SSO HA Configuration: 5. Step 4.