Usage Guidelines. Configured Redundancy Mode = SSO. Step 5. Redundancy Mode (Configured) = sso Redundancy State = sso Maintenance Mode = Disabled Manual Swact = enabled Communications = Up client count = 115Enters global configuration mode. 12. 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#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 =. client count = 109 . The NSF/SSO—L2VPN Pseudowire Redundancy feature enables you to set up your network to detect a failure in the network and reroute the L2 service to another endpoint that can continue to provide service. Step 4. I try to setup HA with SSO with 2x WLC 5520 version 8. Cisco 3504 WLCs. Switch# show redundancy states. show redundancy >>>>>> check here for mode you have configured. This mode does not provide power redundancy. Note Enabling SSO initiates a controller reboot. The active pseudowire. Example: Device(config-red)# mode sso: Configures stateful switchover. I will show you how to make a wireless-controller-cluster. 2(20)EWA and later releases. The Cisco Nexus 9504, 9508, 9516,. 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. The processing of mirroring this information between route processors is known as checkpointing. 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. According to cisco: SSO is the IOS High Availability feature that allows one RSP on a 7500 to immediately take over for the other RSP in the event of an RSP failure. This chapter describes how to configure supervisor engine redundancy using Cisco nonstop forwarding (NSF) with stateful switchover (SSO). 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. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. Enters redundancy configuration mode. 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 =. Step 5. If you perform an online insertion and removal (OIR) of the module, the switch resets during the. 6. 12. Router(config-red)# end. A redundancy VLAN is connected to the redundant port on Cisco WiSM2 through the backplane. SSO HSRP alters the behavior of HSRP when a device with redundant Route Processors (RPs) is configured for stateful switchover (SSO) redundancy mode. 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. 0. When this command is entered, the redundant supervisor engine is reloaded and begins to work in SSO mode. Maintenance Mode = Disabled . restart the Wireless controller in maintenance mode. Example: Router(config)# exit Example: Router # Enters redundancy configuration mode. Supervisor Module Redundancy. Configuration on. 2(20)EWA and later releases. 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 to support SSO mode. Usage Guidelines. = Non-redundant Redundancy Mode (Configured) = sso Redundancy State = Non Redundant. The redundancy port in standalone controllers and the redundancy VLAN in Cisco WiSM2 are assigned. For Enterprise Services or IP Base mode, use ISSU to upgrade software for both RPR and SSO redundant mode. Step 6: mode sso. Step 4. WLC のステータスや設定を確認する. Router(config-red)# mode sso. Step 5. To do this, we will use “redundancy” command under global configuration mode and after that we will select mode with “mode sso” command. client_notification_TMR = 30000 milliseconds . end. The First Sign Of Life (FSOL) triggers that are supported on SSO include DHCP proxy (where the iWAG acts as the DHCP proxy server) and DHCP. 1 onwards, the method to configure the gateway IP. 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. Example: Device(config-red)# exit: Exits redundancy. 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. 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. Description. 0. SSO HSRP. configure interface address redundancy-management 10. 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. 131. " Configuring the Redundancy Mode. Note Enabling SSO initiates a controller reboot. Enter application redundancy mode. 1. 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. (Optional) Ensure network. 130，稱為WLC1; 第二個地址IP地址10. . 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 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. Device(config-red)# mode sso: Configures stateful switchover. We were testing a WLC HA Pair failure scenario wherein we removed the RP port connection from Active WLC. Step 4. 0. This example shows how to set the redundancy mode to SSO: Device (config)# redundancy Device (config-red)# mode sso Device (config. In an HA environment using FlexConnect locally switched clients, the client information might not show the username. Save the configuration on the controller. Step 2: mode sso Example: Switch (config-red)# mode sso Configures SSO. The mode sso command can be entered only from within redundancy configuration mode. 2(20)EWA and later releases. We will definitely upgrade are fus code. Step 5: end. Reason: Software version. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. (CSCec05612)Catalyst 6500 Series Switch Cisco IOS Software Configuration Guide, Release 12. 2(20)EWA and later releases. Step 1. Enters redundancy configuration mode. Redundancy Mode = SSO ENABLED. redundancy 4. With RPR, the backup supervisor engine is partially initialized and. When you configure the controller for HA SSO, the Cisco 600 Series OfficeExtend Access Points are not supported. Switch(config-red)# end. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. This feature is supported on all controller models supporting HA SSO feature: Cisco 8500 Series Controllers . Step 4: mode sso. ホット スタンバイ WLC の設定. Stateful Switchover enabled routers will always checkpoint line card. Step 2. 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. 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 the redundant supervisor engine is inserted, the active supervisor engine detects its presence, and the redundant supervisor engine boots into a partially-initialized state in RPR mode and a fully-initialized state in SSO mode. After rebooting the primary controller changed into Maintanence Mode. This feature is supported on all controller models supporting HA SSO feature: Cisco 8500 Series Controllers . config redundancy mode sso. The problem is a version mismatch. Redundancy Mode = SSO ENABLED. Redundancy may not work due to differences between the Cisco IOS releases. EMD EARLY DEPLO. If it is in ROMMON, try boot with manual "boot" command. 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. Configuration Examples for DHCP High. Image Version = Cisco IOS Software, Catalyst L3 Switch Software (CAT9K_IOSXE), Experimental Version 16. In case of n+1 redundancy, access points are configured with primary, secondary, and tertiary controllers. Enters redundancy configuration mode. redundancy Router(config)# 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. Sets the redundancy configuration mode to SSO on both the active and standby RP. Step 3. Route Processor Redundancy (RPR) refers to the provision of support for the redundancy feature. LACP and PAGP is not supported in HA mode in releases until, and including, Cisco IOS XE Gibraltar 16. For Enterprise Services or IP Base mode, use ISSU to upgrade software for both RPR and SSO redundant mode. End with CNTL/Z. Step 5: exit. 90. To set the redundancy mode to stateful switchover (SSO), use the mode sso command in redundancy configuration mode. Step 4 Router# show redundancy states Displays the operating redundancy mode. On the Cisco 8500 Series Catalyst Edge Platform, Stateful Switchover (SSO) can be used to enable a second IOS process. 2. 10. 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. Image Version = Cisco IOS Software, Catalyst L3 Switch Software (CAT9K_IOSXE),Experimental Version 16. mode sso. Enters redundancy configuration mode. Example: Router(red-config)# mode sso: Sets the redundancy configuration mode to SSO. Step 2. (NSF) with a stateful switchover (SSO) when a supervisor-level failure occurs. Step 5. If you perform an online insertion and removal (OIR) of the module, the switch resets during the. SSO HSRP alters the behavior of HSRP when a device with redundant Route Processors (RPs) is configured for stateful switchover (SSO) redundancy mode. Verifies that SSO is enabled. Configures SSO. The configuration on the active controller is synched to the standby controller via the redundant port. Enters redundancy configuration mode. If the command is not found in. Router# copy running-config. Enter config redundancy mode SSO command to enable SSO. Router# copy running-config. 2(20)EWA and later releases. 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. 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. 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. end. 61 /24. Usage Guidelines. Step 6. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. x. 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. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. 168. Exits redundancy configuration mode and returns the switch to privileged EXEC mode. 0. 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. Introduction; Whats New in Cisco IOS XE Dublin 17. 4. mode sso. Displays the operating. Information About Redundancy. 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. 2(20)EWA 以降のリリースでサポートされます。. One switch is running 3. Communications = Up. SSO is supported in Cisco IOS Release 12. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. 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. 170 West Tasman Drive. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. If a VSS does not meet the requirements for SSO redundancy, it will be incapable of establishing a relationship with the peer switch. The following are the ways in which Cisco StackWise Virtual's. Specify a standby slot, by entering the power redundancy-mode redundant n+1 standby-PSslot command. Redundancy Mode (Operational) = sso Redundancy Mode (Configured) = sso Consolidated Platform Configuration Guide, Cisco IOS XE 3. For Enterprise Services or IP Base mode, use ISSU to upgrade software for both RPR and SSO redundant mode. Here is the output from the standby while booting up:. What is RPR redundancy?. RTR02-Sec#sh redundancy. 48. . Learn more about how Cisco is using Inclusive Language. CiscoStackWiseVirtualRedundancy 15 SSORedundancy 15 NonstopForwarding 16 MultichassisEtherChannels 16 MECMinimumLatencyLoadBalancing 16 MECFailureScenarios 17. SSO pair connected to upstream VSS pair with split links and RP connected back to back. Router# copy running-config startup-config %HA-5-MODE:Operating mode is sso, configured mode is sso. Maintenance Mode = Disabled. 3. Step 4. If active supervisor fails, then standby sup will perform following in sequence: Layer3 protocol initialized, routing tables. Step 5. 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 Route Processor Redundancy SSO Mode configure terminal redundancy mode sso main-cpu standby. It designates one of the RPs as the active RP and the other as the standby. configure redundancy mode sso. Usage Guidelines. Standby failures = 0. 255. Exits redundancy configuration mode and returns the switch to privileged EXEC mode. We have an SSO HA implementation with 2x 5520 (both AIR-CT5520-K9), software version 8. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. Step 5. Step 4. 0. This chapter consists of these sections:. config redundancy mode sso on primary. Since we couldnt afford downtime I rebooted standby controller that was in maintenance mode and it was able to boot in sso redundant mode. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. The stack operates in the 1:1 stack mode with the specified active or standby after reboot. Redundancy may not work due to differences between the Cisco. their Capwap tunnel, APs and clients get disconnected. Router(config-red)# end. 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. Redundant System Information :----- Available system uptime = 44 weeks, 2 days, 6 hours, 12 minutes. HA_CONFIG_SYNC-6-BULK_CFGSYNC_SUCCEED: Bulk Sync succeeded Switchover Process Restrictions. “Configuring NSF with SSO Supervisor Engine Redundancy”). Book Contents Book Contents. The mode sso command can be entered only from within redundancy configuration mode. Cisco StackWise Virtual operates stateful switchover (SSO) between the active and standby switches. Step 5 . Both RPs are running the same Cisco. 1. Catalyst 4500/4500-X series switches' VSS does not support route processor redundancy (RPR) mode. SSO HSRP. end. 102. 3. What can be the reason. main-cpu. redundancy Router(config)# redundancy. SSO Operation. SSO HSRP alters the behavior of HSRP when a device with redundant Route Processors (RPs) is configured for stateful switchover (SSO) redundancy mode. Enters redundancy configuration mode. IP-adres 10. In the RPR mode, one of the supervisor engines is active and operational, while the second supervisor engine is in the standby mode. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. Table 13-5 details the redundancy modes you can configure on supported switch platforms. Usage Guidelines. Exits redundancy configuration mode and returns the switch to privileged EXEC mode. Step 5. If you perform an online insertion and removal (OIR) of the module, the switch resets during the. 0. (Optional) Backup the Startup Config and Running Config files of the controllers. In dit voorbeeld is de stateful switchover (SSO) met hoge beschikbaarheid (HA) geconfigureerd tussen twee 9800-CL-instanties, die dezelfde Cisco IOS-softwareversie uitvoeren, die geconfigureerd zijn met gescheiden WMI's en met GUI die toegankelijk is op. reload Table 7-3 Software Redundancy Options for Cisco ASR 1002 and 1004 Routers Router Default HA Setting Options with 2 GB or DRAM Options with 4 GB or DRAM Cisco ASR 1002 Router None None None, RPR, SSO Cisco ASR 1004 Router None None None, RPR, SSO3) Issue the reset system. Redundancy may not work due to differences between the Cisco IOS. 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. Active WLC 上で SSO の mode を disable にする. Step 5. Connected to network with 4x10G links. show redundancy states. SSO-The show module command displays Hot. It is not recomended to configure RA (Registration Authority) as it is not validated. Example: Router(config)# end. Step 4: mode SSO Example: Router(config)# mode SSO Configures SSO. Hardware redundancy on the Cisco ASR 1000 Series Routers gives users the following benefits: A failover option—If a processor fails, the standby processor immediately becomes the active processor with little or no delay. show redundancy states. Initiate a switchover using the command redundancy force-switchover. In Cisco Wireless LAN Controllers, high availability is achieved with redundancy. Enter configuration commands, one per line. 48. 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. You can configure an n+1 redundant mode. It is setup in the below settings but I am not running a pair of these switches. Example: Device(config-red)# mode sso: Configures stateful switchover. Note After configuring SSO mode, the standby RP will automatically reset. (Cisco Controller) >show redundancy summary. If controller1 is configured with 9. Redundancy may not work due to differences between the Cisco IOS. Usage Guidelines. Step 4. Image Version = Cisco IOS Software, Catalyst L3 Switch Software (CAT9K_IOSXE), Experimental Version 16. Example: Device(config-red)# mode sso: Configures stateful switchover. 08. 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. Example: Device(config-red)# mode sso: Configures stateful switchover. mode sso. Step 2: mode sso Example: Switch (config-red)# mode sso Configures SSO. Step 5: exit. 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. 6. 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。. Sets the redundancy configuration mode to SSO on both the active and standby RP. Displays the operating redundancy mode. In Cisco Wireless LAN Controllers, high availability is achieved with 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. If peer unit's management and/or redundancy management entries are present as mobility members please remove them before enabling redundancy. Hope that helps! -Bradley Selzer. Example: Router(config-red-app-grp)#name cube-ha. SRM is inherent with SSO, which brings up the standby route processor. 150. Step 5: exit. 除了這些IP地址外. For more information, see Chapter 1, “Route Processor Redundancy (RPR). 3 255. Step 5. Exits redundancy configuration mode and returns the switch to privileged EXEC mode. Configures SSO. Cisco 3504 Controllers. Router# configure terminal Router(config)# redundancy Router(config)# mode SSO Router(config)# exit Router# reload Stateful Switchover. Catalyst 4500 series switches allow a standby supervisor engine to take over if the active supervisor engine fails. San Jose, California 95134-1706. Enters redundancy configuration mode. 2(20)EWA and later releases. Redundancy may not work due to differences between the Cisco IOS releases. 130，称为WLC1; 第二个地址为IP地址10. 130 pour le. auto-sync startup-config. Check if Auto-Boot is Enabled 6. auto-sync running-config. Cisco IOS XE Bengaluru 17. 5 and the other is running 3. The DHCP high availability features are enabled by default when the redundancy mode of operation is set to SSO. The DHCP high availability features are enabled by default when the redundancy mode of operation is set to SSO. Step 5. Redundancy may not work due to differences between the Cisco IOS. Redundancy may not work due to differences between the Cisco. By default, the system synchronizes all system files, which is the typical setting for most applications. When this command is entered, the redundant supervisor engine is reloaded and begins to work in SSO mode. Router# configure terminal. Figure 2. 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. Router(config)# mode sso. Configures SSO. Enters redundancy configuration mode. 1. The sku on the box for the HA should have this part number: air-ct5508-ha-k9. 6. Step 2: mode sso . I Think that the righ status of SSO Configuration must be like: Hardware Mode = Duplex. Service-Port: 192. Step 6. Cisco NSF works with the SSO feature. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. The first two octets are always 169. Step 4: mode SSO Example: Router(config)# mode SSO: Configures SSO. 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). Example: Device(config-red)# end: Exits redundancy configuration mode and returns to privileged EXEC mode. VRRP and SSO can coexist but both features work independently. Step 5: exit. SSO is supported in Cisco IOS Release 12. Step 2. Step 3:. 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 =. 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. . HA_CONFIG_SYNC-6-BULK_CFGSYNC_SUCCEED: Bulk Sync succeeded Switchover Process Restrictions. SSO is supported in Cisco IOS Release 12. 48. When this command is entered, the redundant supervisor engine is reloaded and begins to work in SSO mode. When this command is entered, the standby supervisor module is reloaded and begins to work in SSO mode. The following is a sample output of the show redundancy rpr command run on the Cisco StackWise Virtual active supervisor:SSO is supported in Cisco IOS Release 12. On primary controller, disable SSO using the command: Config redundancy mode disable The Active and Standby WLCs. Enabling SSO reboots the controllers to negotiate the HA role as per the configuration performed. Enters redundancy configuration mode. Step 5. Router(config)# mode sso. 2(20)EWA and later releases. 90. redundancy 4. Step 3. If any of those mismatched commands are executed on the active switch, the standby. Configurations. ”. Convert RPR to SSO mode, this will force a reboot on standby supervisor. mode sso. What is redundancy mode? 3. Supervisor Module Redundancy. 0 を. Exits redundancy configuration mode and returns the switch to privileged EXEC mode. The SSO feature takes advantage of RP redundancy by establishing one of the RPs as the active RP while the other RP is designated as the standby RP, and then synchronizing critical state. The redundancy port and the redundancy VLAN in Cisco WiSM2 are assigned an automatically generated IP address in which the last two octets are obtained from the last two octets of the RMI. 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. 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. When this command is entered, the redundant supervisor engine is reloaded and begins to work in SSO mode. Step 5. 5) Bring up only one Gig interface and try to access it. Enter configuration commands, one per line. Step 2: mode sso.