168. Example: Router(config)# redundancy Router(config-red)# Enters redundancy configuration mode. Local State = ACTIVE. Example: Device(config-red)# mode sso: Configures stateful switchover. 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. Redundancy may not work due to differences between the Cisco IOS. 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. 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. Step 7: end. x. Redundancy may not work due to differences between the Cisco. SSO is supported in Cisco IOS Release 12. Step 5: exit. Check the Boot Mode 3. SSO pair connected to upstream HSRP active and standby and RP connected via upstream set Now, let’s focus on Cisco SSO Configuration and learn how to configure SSO on Cisco routers. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. SSO pair connected to upstream VSS pair with RP connected via the upstream set of switches in order to detect gateway down scenario. 12. Step 6. They will reboot again. Enters redundancy configuration mode. SSO is supported in Cisco IOS Release 12. Example: Device(config-red)# end: Exits redundancy configuration mode and. Step 5:. The time required by the device to switch over from the active RP to the standby RP varies by platform: Although the newly active processor takes over almost immediately following a switchover, the time required for the device to begin operating again in full redundancy (SSO) mode can be several minutes, depending on the platform. 1. 3SE (Catalyst 3850 Switches) 8 OL-30686-01. With NSF/SSO, peer networking devices do not experience routing flaps. Redundant System Information :-----Available system uptime = 1 year, 49 weeks, 6 days, 20 hours, 30 minutes Switchovers system experienced = 2 Standby failures = 6 Last switchover reason = active unit removed. 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. The processing of mirroring this information between route processors is known as checkpointing. end. Example: Router(red-config)# exit: Exits to global configuration mode. Step 5. 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. +1 is the power supply module reserved for redundancy. With NSF/SSO, peer networking devices do not experience routing flaps. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to privileged EXEC mode. With RPR, the backup supervisor engine is partially initialized and must reload. If SSO mode cannot be established between the active and standby switches because of an incompatibility in the configuration file, a mismatched command list (MCL) is generated at the active switch and a reload into route processor redundancy (RPR) mode is forced for the standby switch. Device(config-red)# mode sso: Configures stateful switchover. I am seeing the SSO is established. I have 2x 5508 in SSO mode. How To Configure Route Processor Redundancy. It designates one of the RPs as the active RP and the other as the standby. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. Router(config-red)# mode sso. Switch # 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 =. Cisco Employee. Redundancy may not work due to differences between the Cisco IOS releases. 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. Example: Router(config-red)# mode sso. If active supervisor fails, then standby sup will perform following in sequence: Layer3 protocol initialized, routing tables. Redundancy configuration (config-red)This command supports Route Processor Redundancy (RPR) with the Cisco uBR10012 router. mode sso. If it is in ROMMON, try boot with manual "boot" command. I performed a failover test (by executing command "redundancy force-switchover" and after the standby controller rebooted, HA seems to no longer be working: From active controller. This example shows how to set the redundancy mode to SSO: Device (config)# redundancy Device (config-red)# mode sso Device (config. 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. 1 Disabling SSO on HA Pair 1 On primary controller, disable SSO using the command: config. There are three modes in redundancy for the standby supervisor when native Cisco IOS Software is used: RPR-The show module command displays Cold. 3. 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. 7) Initiate the reset system self make sure that to verify all the AP's Up and Primary working fine. +1 is the power supply module reserved for redundancy. Cisco 3504 Controllers. Step 6. Router(config-red)# end. When this command is entered, the standby supervisor module is reloaded and begins to work in SSO mode. Last switchover reason = user_forced. 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. In software, supervisor engine redundancy is enabled by running the redundant supervisor engine in route processor redundancy (RPR) or stateful switchover (SSO) operating mode. 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 reset. Router(config-red)# end. Note After configuring SSO mode, the standby RP will automatically reset. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. [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. The mode sso command can be entered only from within redundancy configuration mode. Check if Switches are in SSO Mode 5. High availability SSO is setup and is working good. The feature is enabled by default when the redundancy mode of operation is set to SSO. And it has to be Layer 2 between the 2 RPs, so either directy connected or through a VLAN. After changing the license boot level in sso, you only need to restart the standby engine. Step 5. ※ このドキュメントでは AireOS 8. Is there anything I can do to force it out of maintenance mode? show redundancy summary Redundancy Mode = SSO ENABLED Local State = MAINTENANCE Peer State = UNKNOWN - Communication Down Unit = Secondary Redundancy State = Non Redundant Maintenance Mode = Enabled Maintenance cause= Secondary unit has. Step 2. 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. 2(20)EWA and later releases. Note After configuring SSO mode, the standby RP will automatically reset. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to privileged EXEC mode. Cisco 3504 WLCs. SSO HSRP. exit Router(config)# exit. Exits configuration mode and returns to the. 61 /22. What can be the reason. Enters redundancy configuration mode. Convert RPR to SSO mode, this will force a reboot on standby supervisor. Complete these steps in order to check the redundancy status: a. . Configuring Cisco NSF with SSO • FindingFeatureInformation,page1 • PrerequisitesforNSFwithSSO,page1 • RestrictionsforNSFwithSSO,page2. 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. 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. HANDY#show redundancy Redundant System Information : ----- Available system uptime = 1 hour, 50 minutes Switchovers system experienced = 2 Standby failures = 0 Last switchover reason = active unit removed Hardware Mode = Duplex Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode =. Step 3: end Example: Switch (config-red)# end Returns to EXEC mode. SSO is supported in Cisco IOS Release 12. Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode = Disabled Communications = Up. 6. Step 5. 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. Switch# show running-config. Enters redundancy configuration mode. 3. 9800 WLC-1# show redundancy Redundant System Information : ----- Available system uptime = 1 hour, 35 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. Step 5. Reason: Software version. 0. From both WLC GUIs or CLIs, one can perform simple connectivity tests,. 0 を. 2(20)EWA and later releases. The active pseudowire. Step 6. sso not available as redundancy mode option Go to solution Scott Chauncey Beginner Options 11-01-2012 01:23 PM - edited 03-07-2019 09:48 AM Any idea why rpr. 2. SSO Operation SSO is supported in Cisco IOS Release 12. Step 3. Step 5: Enabling SSO reboots the controllers to negotiate the HA role as per the configuration performed. Once the WLCs are back up then go ahead and reconfigure the HA AP-SSO on the Controller by issuing the following command: Controller>config redundancy mode sso. (Cisco Controller) >show redundancy summary Redundancy Mode = SSO ENABLED Local State = ACTIVE Peer State = UNKNOWN - Communication Down. In an HA environment using FlexConnect locally switched clients, the client information might not show the username. Specify a standby slot, by entering the power redundancy-mode redundant n+1 standby-PSslot command. client count = 149 client_notification_TMR = 30000 milliseconds. Enters configuration mode. Enters redundancy configuration mode. Step 4. Example: Device(config-red)# mode sso: Enables the redundancy mode of operation to SSO. The following guidelines and restrictions apply to supervisor engine redundancy: •If SSO mode cannot be established between the active and standby supervisor engines because of an incompatibility in the configuration file, a mismatched command list (MCL) is generated at the active supervisor engine and a reload into RPR. 131. Step 2. This feature also functions in an nonstop forwarding (NSF) and stateful switchover (SSO) environment. Redundancy may not work due to differences between the Cisco. Heres the redundancy cfg: redundancy. mode SSO Router(config)# mode SSO. The mode sso command can be entered only from within redundancy configuration mode. Hope that helps! -Bradley Selzer. 2(20)EWA and later releases. On the Cisco 8500 Series Catalyst Edge Platform, Stateful Switchover (SSO) can be used to enable a second IOS process. When a redundant supervisor engine runs in SSO mode, the redundant supervisor engine. 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. 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. A critical component of SSO and Cisco HA technology is the cluster control manager (CCM) that manages session re-creation on the standby processor. 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 =. After rebooting the primary controller changed into Maintanence 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. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. 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. The mode sso command can be entered only from within redundancy configuration mode. NSF is supported by the BGP, OSPF, and EIGRP routing protocols and is supported by Cisco Express Forwarding (CEF) for forwarding. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. For Enterprise Services or IP Base mode, use ISSU to upgrade software for both RPR and SSO redundant 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. The ISSU feature allows deployment of new features, hardware, services, and maintenance fixes in a procedure that is seamless to end users. Router# copy running. End with CNTL/Z. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. restart the Wireless controller in maintenance mode. 0 10. Step 5: redundancy. Cisco NSF works with the SSO feature. . This feature is supported on all WLC models supporting HA SSO feature: Cisco 8500 Series WLCs . 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. Redundancy may not work due to differences between the Cisco IOS. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. 0SG and later releases. 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. 1. Switchover Time. 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. 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. x. Note After configuring SSO mode, the standby RP will automatically reset. 2. SSO-The show module command displays Hot. The mode sso command can be entered only from within redundancy configuration mode. Step 6. mode SSO 5. 2(20)EWA and later releases. LACP and PAGP is not supported in HA mode in releases until, and including, Cisco IOS XE Gibraltar 16. auto-sync standard. Step 6. Switch # 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 = Down. mode sso. Enters redundancy configuration mode. Step 5. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. Router(config)# mode sso. Hardware Mode = Duplex Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode = Disabled Communications = Up Current Processor Information :-----Active Location = slot 5 Current Software state = ACTIVE Uptime in current state = 6 days, 5 hours, 28 minutes Image Version = Cisco IOS Software, Catalyst L3 Switch Software Cisco NSF は、SSO 対応のデバイスにおけるルーティング フラップを抑止することによって、ネットワークの安定性を保ちます。 Cisco NSF と SSO により、スイッチオーバー後にルーティング プロトコル情報が復元される間も、既知のルートでデータ パケットの. Enters redundancy configuration mode. 133，称为WLC2。. After this the WLC will reboot and come back as Primary and Standby WLC again. What is redundancy mode? 3. 2. HSRP is SSO aware on interfaces that are configured for HSRP and the standby RP is automatically reset. In this CCNP ENCOR lesson, we will focus on this redundancy mechanism. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. 0. The device supports fault resistance by allowing a standby switch to take over if the active device becomes unavailable. Router(config-red)# mode sso. Step 3. end. To enable Cisco StackWise Virtual on a switch, use the stackwise-virtual command in the global configuration mode. Step 6. Example: Device(config-red)# mode sso: Configures stateful switchover. 2016-10-12 10:10 AM 2017-09-01 03:01 AM 更新. Current Processor Information :-----Active Location = slot 1/3 Current Software state = ACTIVE Uptime in current state = 23 hours, 58 minutes Image Version = Cisco IOS Software, s2t54 Software (s2t54. You can configure the Stateful Interchassis Redundancy feature to determine the active device from a group of devices, based on a number of failover conditions. The mode sso command can be entered only from within redundancy configuration mode. Note Enabling SSO initiates a controller reboot. 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. Router# show running-config. Step 4: show running-config Example: Enters redundancy configuration mode. SSO is supported in Cisco IOS Release 12. Redundancy may not work due to differences between the Cisco IOS releases. Check the Current ISSU and Install States 7. For Enterprise Services or IP Base mode, use ISSU to upgrade software for both RPR and SSO redundant mode. Cisco建议您熟悉Catalyst 9K交换机上的堆叠、堆叠式虚拟(SVL)和“捆绑包”与“安装”引导模式相关概念。. Cisco 3504 Controllers. 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. Cisco 5500 Series WLCs . On the standby controller, re-enter the correct IP addresses corresponding to the management and dynamic interfaces. Maintenance Mode = Disabled. The state of these features is preserved between both the active and standby. Manual Swact = enabled . 255. SSO pair connected to upstream VSS pair with split links and RP connected back to back. Step 3. SRM is inherent with SSO, which brings up the standby route processor. 130，稱為WLC1; 第二個地址IP地址10. Example: Device#. 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. Service-Port: 192. The mode sso command can be entered only from within redundancy configuration mode. client_notification_TMR = 30000 milliseconds . Running the Supervisor card in RPR or SSO operating mode enables Supervisor 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. 101. 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. Router# copy running-config startup-config If SSO mode cannot be established between the active and standby switches because of an incompatibility in the configuration file, a mismatched command list (MCL) is generated at the active switch and a reload into route processor redundancy (RPR) mode is forced for the standby switch. 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. 61 /24. 2 255. Check if There is Sufficient Available Memory on Flash 4. 2(20)EWA and later releases. SSO is supported in Cisco IOS Release 12. The primary will reboot to enable sso and pull the config from the current active (secondary in this case) unit xml on boot. The two supervisors operate in an active/standby capacity in which only one of the supervisor modules is active at any. Hope that helps! -Bradley Selzer. 12. Enters redundancy configuration mode. The system has experienced 4 switchovers. ホット スタンバイ WLC の設定. Router(config-red)# end. Check if Switches are in SSO Mode 5. 0. Once config is bulk-synced the primary unit is now in HOT STANDBY. and the redundant supervisor engine boots into a partially-initialized state in RPR mode and a fully-initialized state in SSO mode. mode sso. Example: Device(config-red)# exit: Exits redundancy. ASR は2種類のRP redundancy modeがあります。 RPR Route Processor Redundancy とSSO Stateful Switchover になります。 RPR を使用すると、スタンバイ RP を設定することができます。RPR を設定する場合、 スタンバイ RP はブートアップ時に Cisco IOS ソフトウェアをロードし、スタンバイ モードで自身を初期化します. Redundancy Mode (Operational) = sso Redundancy Mode (Configured) = sso Consolidated Platform Configuration Guide, Cisco IOS XE 3. 90. Hi! A custommer of mine tried to configure HA AP-SSO with two 5508 controllers. 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. This chapter describes how to configure supervisor engine redundancy using Cisco nonstop forwarding (NSF) with stateful switchover (SSO). ”. Configures SSO. 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. 255. Exits redundancy configuration mode and returns the switch to privileged EXEC mode. Step 4. end. 1. Example: Device(config-red)# mode sso: Configures stateful switchover. Example: Device(config-red)# mode sso: Configures stateful switchover. The Cisco Nexus 9504, 9508,. config redundancy mode sso on primary. Step 4. Check if Auto-Boot is Enabled 6. config redundancy mode sso. main-cpu. On primary controller, disable SSO using the command: Config redundancy mode disable The Active and Standby WLCs. When the controller works as a host for spanning tree, ensure that you configure portfast trunk in the uplink switch using. SSO は、Cisco IOS Release 12. l’adresse IP 10. This feature is supported on all controller models supporting HA SSO feature: Cisco 8500 Series Controllers . Step 5. Router (config)# redundancy. configure redundancy mode ssoEnters redundancy configuration mode. Router (config-red)# end. Router(config-red)# end. Ensures that the PFC operating mode matches on both chassis, to ensure that the VSS comes up in SSO redundancy mode. Step 4. 1. I Think that the righ status of SSO Configuration must be like: Hardware Mode = Duplex. This command supports Route Processor Redundancy Plus (RPR+) with the Cisco uBR10012 router. Step 5. Redundancy may not work due to differences between the Cisco. 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. HA_CONFIG_SYNC-6-BULK_CFGSYNC_SUCCEED: Bulk Sync succeeded Switchover Process Restrictions. Example: Device (config-red)# mode sso: Configures SSO. From Cisco IOS XE Amsterdam 17. 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. Step 5. Example: Device (config-red)# endWith SSO redundancy, the StackWise Virtual standby switch is always ready to assume control if a fault occurs on the StackWise Virtual active switch. SSO HSRP alters the behavior of HSRP when a device with redundant Route Processors (RPs) is configured for stateful switchover (SSO) redundancy mode. 0. Chapter 5 Configuring Supervisor Engine Redundancy Using RPR and SSO About Supervisor Engine Redundancy SSO supports stateful switchover of the following Layer 2 features. Step 4. Enters global configuration mode. To disable Cisco StackWise Virtual, use the no form of this command. What is SSO switchover? 5. show redundancy >>>>>> check here for mode you have configured. running with image version 8. Switch(config-red)# end. Operating Redundancy Mode = RPR. Router# show redundancy Redundant System Information :-----Available system uptime = 38 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 Communications =. 3 255. Displays the operating redundancy mode. Usage Guidelines. # redundancy Switch(config-red)# mode sso Switch(config-red)# end Switch# show redundancy states my state = 13 -ACTIVE peer. = SSO Redundancy Mode (Configured) = SSO Redundancy State = Non Redundant Manual Swact = disabled (system is simplex (no peer unit)) Communications = Down Reason:. main. Step 3. 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. 2(20)EWA and later releases. Once you get them on the same version, you will be able to get to SSO. config redundancy mode sso. 0. end. 12. configure redundancy mode sso. SSO HSRP alters the behavior of HSRP when a device with redundant Route Processors (RPs) is configured for stateful switchover (SSO) redundancy mode. 4. Example: Device(config-red)# mode sso: Configures stateful switchover. 4. HSRP is SSO aware on interfaces that are configured for HSRP and the standby RP is automatically reset. 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 =. 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. Step 5: end.