Step 4. 11 peer-redundancy-management 10. 2(20)EWA and later releases. For Enterprise Services or IP Base mode, use ISSU to upgrade software for both RPR and SSO redundant mode. Step 6. End with CNTL/Z. redundancy mode sso. ※ このドキュメントでは AireOS 8. 2. (Operational) = sso Redundancy Mode. exit Router(config)# exit. Router# copy running. end. x. Check if There is Sufficient Available Memory on Flash 4. 39. (Optional) Ensure network connectivity. Check the Current ISSU and Install States 7. Step 4: mode sso. Step 4 Router# show redundancy states Displays the operating redundancy mode. 61 /24. Usage Guidelines. Example: Router(red-config)# mode sso: Sets the redundancy configuration mode to SSO. 2. Cisco IOS Nonstop Forwarding (NSF) always runs with stateful switchover (SSO) and provides redundancy for Layer 3 traffic. 0 を. Example: Router(config-red)# mode sso. With RPR, the backup supervisor engine is partially initialized and must reload. 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. Enters redundancy configuration mode. Redundancy may not work due to differences between the Cisco IOS releases. Router(config)# mode sso. 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. High availability SSO is setup and is working good. Example: Router(config)# router bgp 1000Example: Enabling 1:1 Redundancy Stack Mode; Example: Disabling 1:1 Redundancy; Example: Enabling 1:1 Redundancy Stack Mode. Example: Device (config-red)# mode sso: Configures SSO. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. When this command is entered, the redundant supervisor engine is reloaded and begins to work in SSO mode. 170 West Tasman Drive. 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. Syntax Description. For Enterprise Services or IP Base mode, use ISSU to upgrade software for both RPR and SSO redundant mode. Maintenance Mode = Disabled. see. redundancy Router(config)# redundancy. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to privileged EXEC mode. Step 4: mode sso. Usage Guidelines. 0. Manual Swact = enabled . Communications = Up. config redundancy mode sso. Maintenance Mode = Disabled. 12. 133 voor de tweede, WLC2 genoemd. It is setup in the below settings but I am not running a pair of these switches. config redundancy mode sso. 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. Copy the New Image to be Upgraded / Downgraded ISSU Workflows - Actual Upgrade One Step Work Flow Three Step Work Flow Post ISSU Checklist Action. Router# copy running. Example: Device(config-red)# mode sso: Enables the redundancy mode of operation to SSO. 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. When this command is entered, the standby switch is reloaded and begins to work in SSO 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. Once config is bulk-synced the primary unit is now in HOT STANDBY. SSO refers to the implementation of Cisco IOS software that allows applications and features to maintain a defined state between an active and standby Route Processor (RP). Standby として動作していた WLC のポートを変更するか、コンフィグの初期化する. you then add the SSO redundancy commands on the active supervisor and you can insert the prepared new supervisor. (Cisco Controller) >show redundancy summary. 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. Hardware Mode = Duplex. When this command is entered, the standby supervisor module is reloaded and begins to work in SSO mode. 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. Description. Enters redundancy configuration mode. Step 3:. For WLC 1, go to Monitor > Redundancy > Summary: b. Example: Device (config-red)# end Controller # 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 = Disabled Communications. Communications = Up. 9. configure interface address management 10. Router(config-red)# end. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. Image Version = Cisco IOS Software, Catalyst L3 Switch Software (CAT9K_IOSXE), Experimental Version 16. In Cisco Wireless LAN Controllers, high availability is achieved with redundancy. Step 4: mode sso. Router# configure terminal Router(config)# redundancy Router(config)# mode SSO Router(config)# exit. Follow these guidelines when configuring your system to SSO mode: You must use identical Cisco IOS images on the to support SSO mode. The Virtual Redundancy Routing Protocols (VRRP) is not SSO-aware, meaning state information is not maintained between the active and standby switches during normal operation. Step 3:. x. Usage Guidelines. EMD EARLY DEPLO. Note Enabling SSO initiates a controller reboot. (Cisco Controller) >show redundancy summary. 6. 255. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. SSO is supported in Cisco IOS Release 12. SSO HSRP alters the behavior of HSRP when a device with redundant Route Processors (RPs) is configured for stateful switchover (SSO) redundancy mode. Redundancy State = sso . mode sso. If the HA unit is not an HA sku, then you need a minimum of 50 ap license. Step 1. Displays the operating redundancy mode. Step 5: end. end. With NSF/SSO, peer networking devices do not experience routing flaps. When this command is entered, the redundant supervisor engine is reloaded and begins to work in SSO mode. Router(config-red)# end. end. # redundancy Switch(config-red)# mode sso Switch(config-red)# end Switch# show redundancy states my state = 13 -ACTIVE peer. config redundancy mode sso. Example: Device(config-red)# exit: Exits redundancy. 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. The Cisco Nexus 9504, 9508, 9516,. 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. For more information, see Chapter 1, “Route Processor Redundancy (RPR). Step 5: end. Step 7: end. [Redundancy Detail] ページが表示されます。 ステップ 10 [Monitor] > [Redundancy] > [Statistics] を選択し、HA ペアの冗長統計情報を表示します。 [Redundancy Statistics] ページが表示されます。 ステップ 11 : 次の手順に従って、ピア ネットワーク ルートを設定します。3. SSO is supported in Cisco IOS Release 12. 2(20)EWA and later releases. The mode sso command can be entered only from within redundancy configuration mode. (See the “Performing a Software Upgrade” section on page 8-12. 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. Check if Switches are in SSO Mode 5. A redundancy VLAN is connected to the redundant port on Cisco WiSM2 through the backplane. The mode sso command can be entered only from within redundancy configuration mode. Step 4. The default mode for the Cisco 7304 router and Cisco 10000 series routers is SSO. Information About Redundancy. In Cisco Wireless LAN Controllers, redundancy is achieved in two ways— n+1 and AP SSO redundancy. Step 5. 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. This example shows how to set the redundancy mode to SSO: Device(config)# redundancy Device(config-red)# mode sso Device(config-red)# policy config-sync prc reload. configure redundancy mode sso. Step 5. main. SSO は、Cisco IOS Release 12. The mode sso command can be entered only from within redundancy configuration mode. auto-sync startup-config. SSO is supported in Cisco IOS Release 12. Step 6. The processing of mirroring this information between route processors is known as checkpointing. 2. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. 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. end. The mode sso command can be entered only from within redundancy configuration mode. Example: Device#. Step 5: exit. SSO is supported in Cisco IOS Release 12. Note After configuring SSO mode, the standby RP will automatically reset. Switch(config-red)# mode sso. show redundancy states. Cat-6509#show redundancy Redundant System Information : ----- Available system uptime = 10 hours, 12 minutes Switchovers system experienced = 1 Standby failures = 1 Last switchover reason = user initiated Hardware Mode = Duplex Configured Redundancy Mode = sso Operating Redundancy Mode = sso!--- This verifies that software has set the. Router(config)# mode sso. Upgrade the current active Supervisor. Enter application redundancy mode. show redundancy >>>>>> check here for mode you have configured. Stateful Switchover is particularly useful in conjunction with Nonstop. Step 5. Usage Guidelines. restart the Wireless controller in maintenance mode. 6. For Enterprise Services or IP Base mode, use ISSU to upgrade software for both RPR and SSO redundant mode. client_notification_TMR = 30000 milliseconds . Cisco StackWise Virtual operates stateful switchover (SSO) between the active and standby switches. If a VSS does not meet the requirements for SSO redundancy, it will be incapable of establishing a relationship with the peer switch. Cisco recommends that you are familiar with stacking, stackwise-virtual (SVL), and "bundle" Vs "install" boot mode related concepts on Catalyst 9K switches. ”. The Broadband High Availability Stateful Switchover feature allows you to configure subscriber redundancy policies that tune the synchronization process. We were testing a WLC HA Pair failure scenario wherein we removed the RP port connection from Active WLC. Step 5: redundancy. Step 6. Operating Redundancy Mode = rpr. 12. 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 2: mode sso Example: Switch (config-red)# mode sso Configures SSO. 05-25-2012 08:56 AM - edited 03-07-2019 06:54 AM. ※ このドキュメントでは AireOS 8. The. SSO also synchronizes critical state information. 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 =. Combined. 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. Step 6. Exits redundancy configuration mode and returns the switch to privileged EXEC mode. End with CNTL/Z. What is redundancy mode SSO? 2. 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. Switch# show redundancy states. Supervisor Module Redundancy. 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. 2(20)EWA and later releases. Redundancy may not work due to differences between the Cisco IOS releases. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. 130，称为WLC1; 第二个地址为IP地址10. Redundancy may not work due to differences between the Cisco IOS releases. Step 5. 4. auto-sync standard. HA_CONFIG_SYNC-6-BULK_CFGSYNC_SUCCEED: Bulk Sync succeeded Switchover Process Restrictions. Enters global configuration mode. 39. Step 5. Cisco SSO (frequently used with NSF) minimizes the time a network is unavailable to its users following a switchover while continuing to forward IP packets. Check if Switches are in SSO Mode 5. Step 4: mode SSO Example: Router(config)# mode SSO Configures SSO. exit 6. redundancy mode sso ! ip cef distributed mpls ldp graceful-restart mpls label protocol ldp ip vrf vpn1 rd 100:1 route-target export 100:1 route-target import 100:1 no mpls aggregate-statistics ! interface Loopback0 ip address 10. Connect with console to it and check which state it is in. 255. 除了这些IP地址外，还. “Configuring NSF with SSO Supervisor Engine Redundancy”). The configuration on the active controller is synched to the standby controller via the redundant port. If controller1 is configured with 9. show redundancy states. Enter configuration commands, one per line. SSO pair connected to upstream VSS pair with RP connected via the upstream set of switches in order to detect gateway down scenario. Step 3: end Example: Switch (config-red)# end Returns to EXEC mode. Step 6. end. What is RPR redundancy?. The Supervisor 7-E card has four uplink ports on its front panel. The mode sso command can be entered only from within redundancy configuration mode. Enters redundancy configuration mode. This example shows how to set the redundancy mode to SSO: Device(config)# redundancy Device(config-red)# mode sso Device(config-red)# policy config-sync prc reload. Connect the network ports. 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. Enters redundancy configuration mode. The New High Availability feature i. 39. In the RPR mode, one of the supervisor engines is active and operational, while the second supervisor engine is in the standby mode. Figure 2. Device(config-red)# mode sso: Configures stateful switchover. Step 4. Usage Guidelines. The documentation set for this product strives to use bias-free language. Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode = Disabled Communications = Up. Configuring Route Processor Redundancy SSO Mode configure terminal redundancy mode sso main-cpu standby. core-7606-01#show redundancy . 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. On primary controller, disable SSO using the command: Config redundancy mode disable The Active and Standby WLCs. When this command is entered, the redundant supervisor engine is reloaded and begins to work in SSO mode. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. Step 4. To do this, we will use “redundancy” command under global configuration mode and after that we will select mode with “mode sso” command. First you can completely configure the first WLC as you wish. Last switchover reason = none. Reason: Software version. Cisco Public HA SSO behavior Redundancy Port (RP) BRKEWN-2846 19 Redundancy Port (RP) • Syncs configuration and AP/Client databases between Active and Standby • Monitors status of the chassis • Possible single point of. Step 3. 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. Router # Answer: In software, supervisor engine redundancy is enabled by running the redundant supervisor engine in route processor redundancy (RPR) or stateful switchover (SSO) operating mode. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. Router (config)# redundancy. Are these switches setup in this manner by default? Can the redundancy be disabled if I am not going to use redundancy? What are the commands to disable redundancy? switch 1 provision ws-c3850-48p. For Enterprise Services or IP Base mode, use ISSU to upgrade software for both RPR and SSO redundant mode. 6. Redundancy Mode (Configured) = sso . 4. Enters redundancy configuration mode. (Optional) Backup the Startup Config and Running Config files of the controllers. 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. 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. Configuring Cisco NSF with SSO • FindingFeatureInformation,page1 • PrerequisitesforNSFwithSSO,page1 • RestrictionsforNSFwithSSO,page2. SSO pair connected to upstream VSS pair with split links and RP connected back to back. Catalyst 4500 series switches allow a standby supervisor engine to take over if the active supervisor engine fails. Router(config)# mode sso. Example: Device(config-red)# mode sso: Configures stateful switchover. With RPR, the backup supervisor engine is partially initialized and. If the command is not found in the Catalyst 4500 Command Reference, it is located in the larger Cisco IOS library. All unsaved configuration will be saved. What can be the reason. Step 5. Step 6. Redundancy Mode (Configured) = sso Redundancy State = sso Maintenance Mode = Disabled Manual Swact = enabled Communications = Up client count = 115Enters global configuration mode. SSO pair connected to upstream VSS pair with split links and RP connected back to back. Redundancy-MGNT: 192. = sso Redundancy Mode (Configured) = sso Split Mode = Disabled Manual Swact = Enabled Communications = Up client count = 29 client_notification_TMR = 30000 milliseconds keep_alive TMR. Service-Port: 192. 2. The standby will sync its configuration from. If the router is configured for SSO mode, and the active RP fails before the standby is ready to switch over, the router will recover through a full system. Step 6. Switches can run multiple route processors (supervisors) in 3 modes: RPR (Route Processor Redundancy) RPR+ (Route Processor Redundancy plus) SSO (Stateful Switchover) While RPR was the 1 st one to be introduced, RPR+ came in later and the latest offering was SSO. 255 ! interface GigabitEthernet1/0/4 ip vrf forwarding vpn1 ip address 10. client count = 109 . End with CNTL/Z. Uptime in current state = 4 days, 21 hours, 27 minutesYes you need the RP in order to build SSO. Step 6 . Current Processor Information :----- Active Location = slot 1 Current Software state = ACTIVE. Redundancy may not work due to differences between the Cisco. Both controllers reboot and pair up in the SSO mode. Note After configuring SSO mode, the standby RP will automatically reset. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. 48. Enters redundancy configuration mode. With a Supervisor Engine 720, if all the installed switching modules have DFCs, enter the fabric switching-mode allow dcef-only command to disable the Ethernet ports on both supervisor engines, which ensures that all modules are operating in dCEF mode and simplifies switchover to the redundant supervisor engine. 56. Router# configure terminal. Step 4. To re-enable SSO, execute the command Config redundancy sso on the primary and secondary controllers. Reason: Software version. We have two Cisco WLC 8540 in HA pair. 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. configure redundancy unit secondary. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. 1. 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. end. 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. † 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. Router#show redundancy Redundant System Information : ----- Available system uptime = 6 days, 4 hours, 17 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 =. 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. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. License for 100 APs, 96 APs in use. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. Note After configuring SSO mode, the standby RP will automatically reset. Save the configuration on the controller. Both RPs must run the same Cisco IOS image. To reload a single supervisor in the Quad-Supervisor setup enter the hw-module switch switch-number subslot subslot-number oir power-cycle command in privileged. Check the Boot Mode 3. A router in SSO redundancy mode checkpoints Layer 2 protocol states and line card operation. @Ivan Shirshin wrote: Hi, It is likely standby sup is stuck in boot or ROMMON mode as it is showing Other status in the outputs above. 1. The mode sso command can be entered only from within redundancy configuration mode. HTH,. Configured Redundancy Mode = RPR. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. Complete these steps in order to check the redundancy status: a. Redundancy may not work due to differences between the Cisco IOS releases. SSO Operation. Exits redundancy configuration mode and returns the switch to privileged EXEC mode. 0. This feature is not supported on the C9500-12Q, C9500-16X, C9500-24Q, C9500-40X models of the Cisco Catalyst 9500 Series Switches. insrc-redundant. Step 2. It is setup in the below settings but I am not running a pair of these switches. Enters redundancy configuration mode. 0 !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. Maintenance Mode = Disabled. 48. Router(config-red)# mode 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. Version 7. Step 5. Standby failures = 3. 1 onwards, the method to configure the gateway IP. Redundancy Mode (Operational) = sso Redundancy Mode (Configured) = sso Consolidated Platform Configuration Guide, Cisco IOS XE 3. Usage Guidelines. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. Operating Redundancy Mode = RPR. their Capwap tunnel, APs and clients get disconnected. The problem is a version mismatch. Step 4: mode SSO Example: Router(config)# mode SSO: Configures SSO. Step 2: mode sso Example: Switch (config-red)# mode sso Configures SSO. 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. 48. Redundancy may not work due to differences between the Cisco. 2016-10-12 10:10 AM 2017-09-01 03:01 AM 更新. Enters redundancy configuration mode. This feature is supported on all controller models supporting HA SSO feature: Cisco 8500 Series Controllers . When this command is entered, the redundant supervisor engine is reloaded and begins to work in SSO mode. Catalyst 4500 series switches allow a standby supervisor engine to take over if the active supervisor engine fails. ) To minimize down time during software changes on the supervisor engine, load the new image onEnters redundancy configuration mode. 2(20)EWA and later releases. Enters configuration mode. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. AP SSO set within the Cisco Unified Wireless Network software release v7. Maintenance Mode = Disabled. Example: Router(red-config)# exit: Exits to global configuration mode. x. In Cisco Wireless LAN Controllers, redundancy is achieved in two ways— n+1 and AP SSO redundancy. 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. SSO HSRP alters the behavior of HSRP when a device with redundant Route Processors (RPs) is configured for stateful switchover (SSO) redundancy mode. Example: Device (config-red)# mode sso: Configures SSO. When an RP is active and the other RP is standby, SSO enables the standby RP to take over if the active RP fails. Redundancy may not work due to differences between the Cisco IOS releases. The mode sso command can be entered only from within redundancy configuration mode. Table 13-5 details the redundancy modes you can configure on supported switch platforms. If the. 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. When we simulate a problem by powering off the Active Controller, the standby controller will reboot, all of our APs loose. This example shows how to set the redundancy mode to SSO: Device (config)# redundancy Device (config-red)# mode sso Device (config. シングル構成しているのが片方電源を抜いてもトラップがとばないのです。在本示例中，高可用性 (HA)狀態切換 (SSO)配置在兩個9800-CL例項之間，這些例項運行相同的Cisco IOS軟體版 本，這些例項已配置有獨立的WMI，並且可以通過以下網址訪問的GUI. Example: Device(config-red)# mode sso: Configures stateful switchover. Step 2 Router(config-red)# mode sso Configures SSO. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. Configuration, forwarding, and state information are synchronized from the StackWise Virtual active switch to the redundant switch at startup, and whenever changes to the StackWise Virtual. 2(20)EWA and later releases. If any of those mismatched commands are executed on the active switch, the standby.