San Jose, California 95134-1706. Step 4. 10. Enters redundancy configuration mode. Switchover Time. † Software upgrade. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to privileged EXEC mode. License for 100 APs, 96 APs in use. SSO is supported in Cisco IOS Release 12. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to privileged EXEC mode. When you configure the controller for HA SSO, the Cisco 600 Series OfficeExtend Access Points are not supported. 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. The mode sso command can be entered only from within redundancy configuration mode. The mode sso command can be entered only from within redundancy configuration mode. Redundancy may not work due to differences between the Cisco. When this command is entered, the standby supervisor module is reloaded and begins to work in SSO mode. 1. The default mode for the Cisco 7500 series routers is HSA. Step 6. 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. 6) once you accessible check the Redundancy summary. Local State = MAINTENANCE. The following are the ways in which Cisco StackWise Virtual's. 1 onwards, the method to configure the gateway IP. What is SSO switchover? 5. 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. For Enterprise Services or IP Base mode, use ISSU to upgrade software for both RPR and SSO redundant mode. Configures SSO. 2(20)EWA and later releases. The Cisco RF Gateway 10 Supervisor Engine 7-E uplink ports are not recommended for data or management traffic in Supervisor Redundancy Mode. HA_CONFIG_SYNC-6-BULK_CFGSYNC_SUCCEED: Bulk Sync succeeded Switchover Process Restrictions. The mode sso command can be entered only from within redundancy configuration mode. 255. Step 2: mode sso Example: Switch (config-red)# mode sso Configures SSO. 1. Usage Guidelines. . Step 4. 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. 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. When this command is entered, the redundant supervisor engine is reloaded and begins to work in SSO mode. 39. VRRP and SSO can coexist but both features work independently. To enable Cisco StackWise Virtual on a switch, use the stackwise-virtual command in the global configuration mode. With NSF/SSO, peer networking devices do not experience routing flaps. SSO HSRP. SSO pair connected to upstream VSS pair with split links and RP connected back to back. 5. Step 6. SSO checkpointing is the process of mirroring information between RPs. Example: Device(config-red)# mode sso: Configures stateful switchover. +1 is the power supply module reserved for redundancy. 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. Step 4. 10. auto-sync standard. 6. 2(20)EWA and later releases. auto-sync bootvar. Example: Device(config-red)# mode sso: Configures stateful switchover. 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. Hardware Mode = Duplex Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode =. Sets the redundancy configuration mode to SSO on both the active and standby RP. Displays the operating redundancy mode. +1 is the power supply module reserved for redundancy. Step 4. Hope that helps! -Bradley Selzer. Router(config)# mode sso. configure redundancy unit secondary. Router# configure terminal. Step 4: mode SSO Example: Router(config)# mode SSO: Configures SSO. A router in SSO redundancy mode checkpoints Layer 2 protocol states and line card operation. If any of those mismatched commands are executed on the active switch, the standby. %HA-5-MODE:Operating mode is sso, configured mode is sso. Redundancy may not work due to differences between the Cisco IOS. With RPR, the backup supervisor engine is partially initialized and must reload. 3 allows the AP to establish CAPWAP tunnel with Active WLC and share mirror copy of AP database with Standby WLC. Step 4. 1. Note Enabling SSO initiates a controller reboot. [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. In software, supervisor engine redundancy is enabled by running the redundant supervisor engine in route processor redundancy (RPR) or stateful switchover (SSO) operating mode. Note Use the show redundancy and show issu state commands throughout the upgrade to verify the status of the upgrade. 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. Step 5. Complete these steps in order to check the redundancy status: a. For information about the in-chassis standby supervisors, enter the show redundancy rpr command in privileged EXEC mode on the Cisco StackWise Virtual active supervisor. Usage Guidelines. When this command is entered, the redundant supervisor engine is reloaded and begins to work in SSO mode. Step 3 Router# show running-config Verifies that SSO is enabled. #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. Redundancy may not work due to differences between the Cisco IOS. Step 4. 2016-10-12 10:10 AM 2017-09-01 03:01 AM 更新. mode SSO Router(config)# mode SSO. Note Enabling SSO initiates a controller reboot. Operating Redundancy Mode = sso Maintenance Mode = Disabled Communications = Up Current Processor Information :-----Active Location = Switch 2 Current Software state =. 0. 5. 12. 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. The primary will reboot to enable sso and pull the config from the current active (secondary in this case) unit xml on boot. Redundancy Mode (Operational) = sso Redundancy Mode (Configured) = sso Consolidated Platform Configuration Guide, Cisco IOS XE 3. Router# copy running. SSO is supported in Cisco IOS Release 12. end. end. 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. 2(20)EWA and later releases. RPR redundancy mode is used. 2SXF OL-3999-08 8. On the standby. 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. 255 ! interface GigabitEthernet1/0/4 ip vrf forwarding vpn1 ip address 10. The stack operates in the 1:1 stack mode with the specified active or standby after reboot. (NSF) with a stateful switchover (SSO) when a supervisor-level failure occurs. Step 1. Step 3. 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. On primary controller, disable SSO using the command: Config redundancy mode disable The Active and Standby WLCs. 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. This command has no. Step 3: end Example: Switch (config-red)# end Returns to EXEC mode. The mode sso command can be entered only from within redundancy configuration mode. Before you begin the ISSU process, verify the redundancy mode for the system. redundancy 4. The default mode for the Cisco 7304 router and Cisco 10000 series routers is SSO. From Cisco IOS XE Amsterdam 17. Step 5. 170 West Tasman Drive. With RPR, the backup supervisor engine is partially initialized and. Step 4. If the HA unit is not an HA sku, then you need a minimum of 50 ap license. Step 5. 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. mode sso. 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 4. I try to setup HA with SSO with 2x WLC 5520 version 8. First you can completely configure the first WLC as you wish. their Capwap tunnel, APs and clients get disconnected. Device(config-red)# mode sso: Configures stateful switchover. Example: Device(config-red)# mode sso: Enables the redundancy mode of operation to SSO. SSO is supported in Cisco IOS Release 12. hw-switch switch 1 logging onboard message level 3. For Enterprise Services or IP Base mode, use ISSU to upgrade software for both RPR and SSO redundant mode. Connect with console to it and check which state it is in. 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. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. 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, SSO2 つの Cisco Wireless Services Module 2（WiSM2）プラットフォーム間の HA を実現するには、コントローラを単一のシャーシに配置するか、仮想スイッチング システム（VSS）を使用してリダンダンシー VLAN を複数のシャーシ間に拡張することで、複数のシャーシに配置する必要があります。3. 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. Version 7. If you perform an online insertion and removal (OIR) of the module, the switch resets during the. The routing protocols have been enhanced with NSF-capability and. Step 8: exit. Note After configuring SSO mode, the standby RP will automatically reset. 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. 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. Step 5. Figure 2. End with CNTL/Z. SSO HSRP. 0. x [S2C-build-v16x_throttle-4064-/. 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. For Enterprise Services or IP Base mode, use ISSU to upgrade software for both RPR and SSO redundant mode. WLC のステータスや設定を確認する. Example: Device(config-red)# exit: Exits redundancy. x. Cisco 5520 wireless LAN controller has a failover RP Port. Note After configuring SSO mode, the standby RP will automatically reset. Router (config)# redundancy. Usage Guidelines. " Configuring the Redundancy Mode. This chapter describes how to configure supervisor engine redundancy using Cisco nonstop forwarding (NSF) with stateful switchover (SSO). 5. The problem is a version mismatch. Enters redundancy configuration mode. Step 6. SSO Dual-Route Processors and Cisco Nonstop Forwarding. Catalyst 4500 series switches allow a standby supervisor engine to take over if the active supervisor engine fails. Image Version = Cisco IOS Software, Catalyst L3 Switch Software (CAT9K_IOSXE), Experimental Version 16. For Enterprise Services or IP Base mode, use ISSU to upgrade software for both RPR and SSO redundant mode. Switch(config-red)# mode sso. HTH,. 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 2: mode sso. If a VSS does not meet the requirements for SSO redundancy, it will be incapable of establishing a relationship with the peer switch. 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. Exits redundancy configuration mode and returns the switch to privileged EXEC 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 3: end. mode 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. 1. 2 255. Configuration Examples for DHCP High Availability. 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. 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. 12. 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. If you perform an online insertion and removal (OIR) of the module, the switch resets during the. Information About Redundancy. = 0 Last switchover reason = active unit removed Hardware Mode = Duplex Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode =. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. 2. Step 4. Example: Router(config)# router bgp 1000Example: Enabling 1:1 Redundancy Stack Mode; Example: Disabling 1:1 Redundancy; Example: Enabling 1:1 Redundancy Stack Mode. . Step 5: exit. 0. 255. 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. Router(config-red)# end. Example: Router(red-config)# exit: Exits to global configuration mode. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. Check the Boot Mode 3. After this the WLC will reboot and come back as Primary and Standby WLC again. 2. Usage Guidelines. This chapter describes how to configure supervisor engine redundancy using Cisco nonstop forwarding (NSF) with stateful switchover (SSO). 3. 12. 168. C6807-XL#show redundancy Redundant System Information :----- Available system uptime = 21 hours, 41 minutes Switchovers system experienced = 0 Standby failures = 0 Last switchover reason = none Hardware Mode = Simplex Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode = Disabled. 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. For more information, see Chapter 1, “Route Processor Redundancy (RPR). 255. redundancy Router(config)# redundancy. Example: Device(config-red)# exit: Exits redundancy. restart the Wireless controller in maintenance mode. A critical component of SSO and Cisco HA technology is the cluster control manager (CCM) that manages session re-creation on the standby processor. Step 2 Router(config-red)# mode sso Configures SSO. Step 6. To set the redundancy mode to stateful switchover (SSO), use the mode sso command in redundancy configuration mode. Step 3. SSO is supported in Cisco IOS-XE Release 3. † 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. Once you get them on the same version, you will be able to get to SSO. SSO is supported in Cisco IOS Release 12. 6. Communications = Up. Router# configure terminal Router(config)# redundancy Router(config)# mode SSO Router(config)# exit. 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. 3. When a redundant supervisor engine runs in SSO mode, the redundant supervisor engine. 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. 102. Check if Auto-Boot is Enabled 6. • 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. n+1 redundant Mode—n number of power supply modules are active (n can be one to seven pput ower supply modules). Standby failures = 0. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. 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. 39. • 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. 48. %HA-5-MODE:Operating mode is sso, configured mode is 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. end. 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. exit 6. (Optional) Ensure network. Step 5:. The Cisco Nexus 9504, 9508,. >> 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. If the command is not found in. x. 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. What is redundancy mode SSO? 2. Check the Current ISSU and Install States 7. When we simulate a problem by powering off the Active Controller, the standby controller will reboot, all of our APs loose. 2(20)EWA and later releases. 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. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. 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. Example: Device(config-red)# mode sso: Configures stateful switchover. Check if There is Sufficient Available Memory on Flash 4. 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. Example: Device(config-red)# mode sso: Configures stateful switchover. 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 =. 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. end. Usage Guidelines. Step 3. 2. 11 peer-redundancy-management 10. Note Enabling SSO initiates a controller reboot. Step 6. HSRP is SSO aware on interfaces that are configured for HSRP and the standby RP is automatically reset. The. Exits redundancy configuration mode and returns the switch to privileged EXEC mode. Use the power redundancy-mode {combined. Enters redundancy configuration mode. Cisco StackWise Virtual operates stateful switchover (SSO) between the active and standby switches. Redundancy Mode Support in Cisco IOS Releases Platform Mode 12. 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. We have two Cisco WLC 8540 in HA pair. The two supervisors operate in an active/standby capacity in which only one of the supervisor modules is active at any. hw-switch switch 1 logging onboard message level 3 redundancy mode sso The new High Availability (HA) feature (that is, AP SSO) set within the Cisco Unified Wireless Network software release version 7. 1. x [S2C-build-v16x_throttle-4064-/. 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 works with the SSO feature. In software, supervisor engine redundancy is enabled by running the redundant supervisor engine in route processor redundancy (RPR) or stateful switchover (SSO) operating. SSO HSRP alters the behavior of HSRP when a device with redundant Route Processors (RPs) is configured for stateful switchover (SSO) redundancy mode. Router# show running-config. When you configure the controller for HA SSO, the Cisco 600 Series OfficeExtend Access Points are not supported. 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. The mode sso command can be entered only from within redundancy configuration mode. The mode sso command can be entered only from within redundancy configuration mode. 0 を. in my case it was secondary. RPR+-The show module command displays Warm. On the Cisco 8500 Series Catalyst Edge Platform, Stateful Switchover (SSO) can be used to enable a second IOS process. Configuration Examples for DHCP High. 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. Router(config-red)# mode sso. What is redundancy mode Cisco? 4. Step 4. 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. 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. Enters redundancy configuration mode. Maintenance Mode = Disabled. 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. 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. 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. Cisco IOS Software, Catalyst 4500 L3 Switch Software. Switch-1(config)# platform hardware vsl pfc mode non-xl (Optional) Sets the PFC operating mode to PFC4 on Chassis A. 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. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to privileged EXEC mode. 2(20)EWA and later releases. † Software. Hope that helps! -Bradley Selzer. Configured Redundancy Mode = SSO. 150. Wrong handling can happen and. mode sso. The mode sso command can be entered only from within redundancy configuration mode. ホット スタンバイ WLC の設定. 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. 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. Enters redundancy configuration mode. With NSF/SSO, peer networking devices do not experience routing flaps. (Cisco Controller) >show redundancy summary. 168. The switch is supports route processor redundancy (RPR). 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 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. Switch(config-red)# end. Information About Redundancy. Note After configuring SSO mode, the standby RP will automatically reset. Step 7: mode sso. 2016-10-12 10:10 AM 2017-09-01 03:01 AM 更新. Enter config redundancy mode SSO command to enable SSO. mode sso.