Router# copy running. 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. Step 5: Enabling SSO reboots the controllers to negotiate the HA role as per the configuration performed. mode sso. 61 /24. RPR redundancy mode is used. Catalyst 4500/4500-X series switches' VSS does not support route processor redundancy (RPR) 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. Switchover Process Restrictions † If any changes to the fabric configuration happen simultaneously with an RP switchover, the chassis is reset and all line cards are reset. 7) Initiate the reset system self make sure that to verify all the AP's Up and Primary working fine. SSO-The show module command displays Hot. 56. The DHCP high availability features are enabled by default when the redundancy mode of operation is set to SSO. 2(20)EWA and later releases. The processing of mirroring this information between route processors is known as checkpointing. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. There is no way i can change it to redundancy mode SSO. While implementing Nonstop Forwarding (NSF) technology in systems using SSO. 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. Redundancy may not work due to differences between the Cisco. 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. When a redundant supervisor engine runs in SSO mode, the redundant supervisor engine. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. 6) once you accessible check the Redundancy summary. Example: Device (config-red)# mode sso: Configures SSO. Example: Device(config-red)# mode sso: Configures stateful switchover. Router# configure terminal. I will show you how to make a wireless-controller-cluster. = 0 Last switchover reason = active unit removed Hardware Mode = Duplex Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode =. 63 /22. 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. “Configuring NSF with SSO Supervisor Engine Redundancy”). end. Step 5: end. 2(20)EWA and later releases. Step 4. 150. Refer to the Catalyst 4500 Series Switch Cisco IOS Command Reference and related publications. 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. 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. Sets the redundancy configuration mode to SSO on both the active and standby RP. Switch(config-red)# end. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. SSO is supported in Cisco IOS Release 12. 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. Only the top two ports are. For Enterprise Services or IP Base mode, use ISSU to upgrade software for both RPR and SSO redundant mode. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to privileged EXEC mode. Switch(config-red)# mode sso. Enters redundancy configuration mode. Image Version = Cisco IOS Software, Catalyst L3 Switch Software (CAT9K_IOSXE),Experimental Version 16. 0. redundancy Router(config)# redundancy. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. 在本示例中，高可用性 (HA)状态切换 (SSO)配置在运行相同Cisco IOS软件版本的两个9800-CL实例之间，这些实例已配置有独立的WMI，且可在以下位置访问 GUI: 第一个地址为IP地址10. Step 3: end Example: Switch (config-red)# end Returns to EXEC mode. RPR+-The show module command displays Warm. Step 6. Description. Maintenance Mode = Disabled. Redundancy Mode (Configured) = sso Redundancy State = sso Maintenance Mode = Disabled Manual Swact = enabled Communications = Up client count = 115Enters global configuration mode. If peer unit's management and/or redundancy management entries are present as mobility members please remove them before enabling redundancy. 2(20)EWA and later releases. 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 # 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 =. 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. If you perform an online insertion and removal (OIR) of the module, the switch resets during the. On the Cisco 8500 Series Catalyst Edge Platform, Stateful Switchover (SSO) can be used to enable a second IOS process. The feature is enabled by default when the redundancy mode of operation is set to SSO. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. n+1 redundant Mode—n number of power supply modules are active (n can be one to seven pput ower supply modules). 4 allows the access point (AP) to establish a CAPWAP tunnel with the Active WLC and share a mirror copy of the AP database with the Standby WLC. Local State = ACTIVE. Step 5. x. 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. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. Usage Guidelines. 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. Step 4. 2(20)EWA and later releases. NSF Operation. 48. 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. show redundancy states. 2(20)EWA and later releases. Step 4: mode SSO Example: Router(config)# mode SSO: Configures SSO. mode sso. When two versions of Cisco IOS images are involved, the command sets supported by two images might differ. mode sso. What is redundancy mode? 3. config redundancy 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. Router# copy running. You can use the switch switch-number role command to set the active and standby switch in 1:1 stack mode. 48. Configuring Cisco NSF with SSO • FindingFeatureInformation,page1 • PrerequisitesforNSFwithSSO,page1 • RestrictionsforNSFwithSSO,page2. The. Step 5. Router(config)# mode sso. Example: Device(config-red)# mode sso: Enables the redundancy mode of operation to 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 =. Router# configure terminal. HA_CONFIG_SYNC-6-BULK_CFGSYNC_SUCCEED: Bulk Sync succeeded Switchover Process Restrictions. Configuration Examples for DHCP High. The processing of mirroring this information between route processors is known as checkpointing. AP SSO set within the Cisco Unified Wireless Network software release v7. If a switch is configured for SSO mode, then stand-by supervisor engine stops at " FIB table synchronization". Step 4. end. Note Enabling SSO initiates a controller reboot. Cisco 3504 WLCs. To disable Cisco StackWise Virtual, use the no form of this command. Step 3 Router# show running-config Verifies that SSO is enabled. 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 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. Step 5. Router(config)# mode sso. The redundancy explained in this article is 1:1, which means that one of the units operates in Active state while the other operates in Hot Standby state. The mode sso command can be entered only from within redundancy configuration mode. Router# copy running-config startup-config %HA-5-MODE:Operating mode is sso, configured mode is sso. Enters redundancy configuration 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. We will definitely upgrade are fus code. ”. Cisco NSF helps to suppress routing flaps in SSO-enabled devices, thus reducing network instability. Table 13-5 Redundancy Modes, Platform Support, and. The default mode for the Cisco 12000 series routers is RPR. Step 6. 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. Cisco 5520 wireless LAN controller has a failover RP Port. 10. Step 3. Example: Device(config-red)# mode sso: Enables the redundancy mode of operation to SSO. Copy the New Image to be Upgraded / Downgraded ISSU Workflows - Actual Upgrade One Step Work Flow Three Step Work Flow Post ISSU Checklist Action. Communications = Up . configure redundancy mode sso. Redundancy may not work due to differences between the Cisco IOS releases. Switch# show running-config. From Cisco IOS XE Amsterdam 17. Exits redundancy configuration mode and returns the switch to privileged EXEC mode. auto-sync startup-config. 1. WLC のステータスや設定を確認する. Step 4. SSO provides RP redundancy by establishing one of the RPs as the active processor and the other RP as the standby processor. Learn more about how Cisco is using Inclusive Language. 2. Enters redundancy configuration mode. † Software upgrade. 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. Redundancy may not work due to differences between the Cisco IOS releases. スタック構成をしているものは電源を片方の電源を抜くとトラップはとぶのですが. Step 5. From both WLC GUIs or CLIs, one can perform simple connectivity tests,. Step 7: end. Introduction; Whats New in Cisco IOS XE Dublin 17. Step 2: mode sso. Step 2: mode sso Example: Switch (config-red)# mode sso Configures SSO. This step is complete when the chassis configuration is synchronized, as indicated by the Bulk sync succeeded message. The Cisco RF Gateway 10 Supervisor Engine 7-E uplink ports are not recommended for data or management traffic in Supervisor Redundancy Mode. x. 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. Cisco recommends that you are familiar with stacking, stackwise-virtual (SVL), and "bundle" Vs "install" boot mode related concepts on Catalyst 9K switches. 48. If the HA unit is not an HA sku, then you need a minimum of 50 ap license. Connect with console to it and check which state it is in. Step 5: redundancy. Chapter 5 Configuring Supervisor Engine Redundancy Using RPR and SSO About Supervisor Engine Redundancy SSO supports stateful switchover of the following Layer 2 features. 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 3:. Information About Redundancy. Exits configuration mode and returns to the. . 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. Redundancy Mode (Operational) = sso Redundancy Mode (Configured) = sso Redundancy State = sso Maintenance Mode = Disabled Manual Swact = enabled Communications = Up. 2. mode sso. 1. %HA-5-MODE:Operating mode is sso, configured mode is sso. 131. 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. 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。. Maintenance Mode = Disabled. Maintenance Mode = Disabled. mode sso. These sections describe supervisor engine redundancy using NSF with SSO: About Cisco IOS NSF-Aware and NSF-Capable Support; NSF with SSO Supervisor Engine Redundancy Overview. Both RPs are running the same Cisco. 2SXF OL-3999-08 8. Router (config-red)# 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. Check if Switches are in SSO Mode 5. 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. In software, supervisor engine redundancy is enabled by running the redundant supervisor engine in route processor redundancy (RPR) or stateful switchover (SSO) operating mode. Router(config)# mode sso. The problem is a version mismatch. SSO is supported in Cisco IOS Release 12. Step 4: mode SSO Example: Router(config)# mode SSO Configures SSO. On primary controller, disable SSO using the command: Config redundancy mode disable The Active and Standby WLCs. +1 is the power supply module reserved for redundancy. Step 4. 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. • 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. The NSF capability on Cisco Catalyst 9300 Series Switches can. Sets the redundancy configuration mode to SSO on both the active and standby RP. 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. Router(config)# redundancy. Step 2 Router(config-red)# mode sso Configures 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. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to privileged EXEC mode. You can configure an n+1 redundant mode. SSO also synchronizes critical state information. 5) Bring up only one Gig interface and try to access it. HTH,. Complete these steps in order to check the redundancy status: a. 2(20)EWA and later releases. The software upgrade procedure supported by supervisor engine redundancy allows you to reload the Cisco IOS software image on the redundant supervisor engine, and once complete, reload the active supervisor engine. (Cisco Controller) >show redundancy summary Redundancy Mode = SSO ENABLED Local State = ACTIVE Peer State = UNKNOWN - Communication Down. 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. Redundancy configuration (config-red)This command supports Route Processor Redundancy (RPR) with the Cisco uBR10012 router. It is setup in the below settings but I am not running a pair of these switches. 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. 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. The Supervisor 7-E card has four uplink ports on its front panel. 2(20)EWA 以降のリリースでサポートされます。. To enable Cisco StackWise Virtual on a switch, use the stackwise-virtual command in the global configuration mode. in my case it was secondary. Redundancy Mode = SSO ENABLED. The mode sso command can be entered only from within redundancy configuration mode. Step 5: end. This feature is not supported on the C9500-12Q, C9500-16X, C9500-24Q, C9500-40X models of the Cisco Catalyst 9500 Series Switches. Example: Router(config)# end. The mode sso command can be entered only from within redundancy configuration 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. ) To minimize down time during software changes on the supervisor engine, load the new image onEnters redundancy configuration mode. One switch is running 3. Switchover Time. And it has to be Layer 2 between the 2 RPs, so either directy connected or through a VLAN. auto-sync running-config. Step 2: mode sso Example: Switch (config-red)# mode sso Configures SSO. Example: Device(config-red)# exit: Exits redundancy. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. 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. Step 8: exit. 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 noneUse the power redundancy-mode {combined. 2(20)EWA and later releases. We have two Cisco WLC 8540 in HA pair. Operating Redundancy Mode = RPR. End with CNTL/Z. SSO Dual-Route Processors and Cisco Nonstop Forwarding. Router(config-red)# mode 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. SSO is supported in Cisco IOS Release 12. Step 5. What is stateful switch over? Stateful Switchover (SSO) is a redundancy feature that allows a Cisco device with two route processors to synchronise router configuration and control plane state information. x [S2C-build-v16x_throttle-4064-/. The mode sso command can be entered only from within redundancy configuration mode. End with CNTL/Z. configure interface address redundancy-management 10. Step 5: exit. insrc-redundant. Note Enabling SSO initiates a controller reboot. client count = 149 client_notification_TMR = 30000 milliseconds. 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. When a standby supervisor engine runs in SSO mode, the standby supervisor engine starts up in a fully-initialized state and synchronizes with the persistent configuration and the running configuration of the active supervisor engine. SSO is supported in Cisco IOS Release 12. This mode does not provide power redundancy. 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. 第一個IP地址10. Sets the redundancy configuration mode to SSO on both the active and standby RP. Redundancy Mode = SSO ENABLED. +1 is the power supply module reserved for redundancy. 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. Check if There is Sufficient Available Memory on Flash 4. Router# copy running-config. 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. SSO is supported in Cisco IOS Release 12. Example: Router(config-red-app-grp)#name cube-ha. Enters global configuration mode. 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. Step 2. 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. If any of those mismatched commands are executed on the active switch, the standby. When this command is entered, the redundant supervisor engine is reloaded and begins to work in SSO mode. Use the power redundancy-mode {combined. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. In this step, the VSS standby chassis reboots, reloads with the new image, and initializes as the VSS standby chassis in SSO redundancy mode, running the new image. The stack operates in the 1:1 stack mode with the specified active or standby after reboot. Enters redundancy configuration mode. Usage Guidelines. SSO HSRP. 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. 2(20)EWA and later releases. 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. Enters redundancy configuration mode. Switch(config-red)# end. 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 switches in the stack to support SSO mode. Exits redundancy configuration mode and returns the switch to privileged EXEC mode. Enters redundancy configuration mode. 90. End with CNTL/Z. = Non-redundant Redundancy Mode (Configured) = sso Redundancy State = Non. When this command is entered, the redundant supervisor engine is reloaded and begins to work in SSO mode. Copy the New Image to be Upgraded / Downgraded ISSU Workflows - Actual Upgrade One Step Work Flow Three Step Work Flow Post ISSU Checklist Action. Save the configuration on the controller. end. Standby failures = 0. Step 4. Example: Device(config-red)# exit: Exits redundancy. Communications = Up. The processing of mirroring this information between route processors is known as checkpointing. The software will prompt to reboot the Standby Supervisor (in slot 5) - confirm to reboot - exit configuration mode and save the configuration. 2(20)EWA and later releases. Enters redundancy configuration mode. When this command is entered, the standby supervisor module is reloaded and begins to work in SSO mode. Step 3. SSO HSRP alters the behavior of HSRP when a device with redundant Route Processors (RPs) is configured for stateful switchover (SSO) redundancy mode. mode 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. High Availability SSO Deployment Guide for Cisco Catalyst 9800 Series Wireless Controllers, Cisco IOS XE Amsterdam 17. Enter configuration commands, one per line. Router(config-red)# end. Router(config-red)# end. Verifies that SSO is enabled. SSO-The show module command displays Hot. Usage Guidelines. Router(config)# redundancy. 39. Step 4: mode sso. 0 を. Step 6. Enter application redundancy mode. Example: Device(config-red)# end: Exits redundancy configuration mode and. 255. The following are the ways in which Cisco StackWise Virtual's. For Enterprise Services or IP Base mode, use ISSU to upgrade software for both RPR and SSO redundant mode. Wrong handling can happen and. 3 allows the AP to establish CAPWAP tunnel with Active WLC and share mirror copy of AP database with Standby WLC. The mode sso command can be entered only from within redundancy configuration mode. Sets the redundancy configuration mode to SSO on both the active and standby RP. ATM SSO is not configurable and runs by default on networking devices configured with ATM and Redundancy Mode SSO. In this article, we take a look at how to configure High Availability Stateful Switchover (HA SSO) on the Cisco 9800 WLCs running IOS-XE using Redundancy Management Interfaces (RMI) in addition to the Redundancy Ports (RP). configure interface address management 10. HSRP is SSO aware on interfaces that are configured for HSRP and the standby RP is automatically reset. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. Step 5. 0. Follow these guidelines when configuring your system to SSO mode: You must use identical Cisco IOS images on the to support SSO mode. 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 =. Router(config-red)# end. The configuration on the active controller is synched to the standby controller via the redundant port. SSO functions in networking devices (usually edge devices) that support dual RPs. 1 onwards, the method to configure the gateway IP. 3 and 7. Active WLC 上で SSO の mode を disable にする. SSO HSRP alters the behavior of HSRP when a device with redundant Route Processors (RPs) is configured for stateful switchover (SSO) redundancy mode. If the. Router# show running-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. 0. (Operational) = sso Redundancy Mode (Configured) = sso Redundancy State = sso Maintenance Mode = Disabled Manual Swact = enabled Communications = Up client count = 115 client_notification_TMR = 30000 milliseconds RF debug mask = 0x0 Device# show. When an RP is active and the other RP is standby, SSO enables the standby RP to take over if the active RP fails. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. Step 4: mode sso. Step 5. NSF and SSO must be configured before attempting an ISSU.