auto-sync config-register. 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. Note Enabling SSO initiates a controller reboot. 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. Switchover Time. Note After configuring SSO mode, the standby RP will automatically reset. How To Configure Route Processor Redundancy. 12. Both RPs must run the same Cisco IOS image. Returns to EXEC mode. Router# copy running-config startup-config %HA-5-MODE:Operating mode is sso, configured mode is sso. (Operational) = sso Redundancy Mode. SSO works with Cisco NSF, which helps reduce the switchover downtime on Layer 3. config redundancy mode sso. Step 6. If peer unit's management and/or redundancy management entries are present as mobility members please remove them before enabling redundancy. 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. Step 5: end. End with CNTL/Z. 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. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. Example: Device (config-red)# mode sso: Configures SSO. The mode sso command can be entered only from within redundancy configuration mode. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. 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. end. Management: 192. 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. We were testing a WLC HA Pair failure scenario wherein we removed the RP port connection from Active WLC. Follow these guidelines when configuring your system to SSO mode: You must use identical Cisco IOS images on the to support SSO mode. In the RPR mode, one of the supervisor engines is active and operational, while the second supervisor engine is in the standby mode. 5. Redundancy may not work due to differences between the Cisco IOS releases. Step 9: router bgp autonomous-system-number. If you perform an online insertion and removal (OIR) of the module, the switch resets during the. Router# show redundancy states. Connected to network with 4x10G links. Configuration Examples for DHCP High. Enters redundancy configuration mode. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. Example: Device(config-red)# mode sso: Configures stateful switchover. n+1 redundant Mode—n number of power supply modules are active (n can be one to seven pput ower supply modules). Router(config-red)# mode sso. Example: Device(config-red)# mode sso: Configures stateful switchover. Step 2. 254. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. Switch# show redundancy states. On the Cisco 8500 Series Catalyst Edge Platform, Stateful Switchover (SSO) can be used to enable a second IOS process. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. Both RPs are running the same Cisco. 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. Usage Guidelines. Refer to the Catalyst 4500 Series Switch Cisco IOS Command Reference and related publications. On the Cisco 8500 Series Catalyst Edge Platform, Stateful Switchover (SSO) can be used to enable a second IOS process. SSO is supported in Cisco IOS Release 12. 2(20)EWA and later releases. Usage Guidelines. 2(20)EWA and later releases. 2. The mode sso command can be entered only from within redundancy configuration mode. Redundancy Mode (Operational) = sso Redundancy Mode (Configured) = sso Split Mode = Disabled Manual Swact = Enabled Communications = Up client count = 29 client_notification_TMR = 30000 milliseconds keep_alive TMR = 9000 milliseconds keep_alive count = 1 keep_alive threshold = 18 RF debug mask = 0x0 Configuring BGP. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. To. 168. Step 4 Router# show redundancy states Displays the operating redundancy mode. Example: Device(config-red)# mode sso: Configures stateful switchover. 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. 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. 6. Usage Guidelines. Redundancy may not work due to differences between the Cisco. (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. 2. Follow these guidelines when configuring your system to SSO mode: You must use identical Cisco IOS images on the switches in the stack to support SSO mode. Step 3. 9. 6. Enter configuration commands, one per line. Example: Device(config-red)# mode sso: Configures stateful switchover. 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 =. 39. SSO is supported in Cisco IOS Release 12. 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. Configures SSO. Enters redundancy configuration mode. You can configure an n+1 redundant mode. Follow these guidelines when configuring your system to SSO mode: You must use identical Cisco IOS images on the supervisor modules to support SSO mode. Check if Switches are in SSO Mode 5. My Secondary Switch is in disable state despite its in SSO mode. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. 0 !Router# show redundancy Redundant System Information : ----- Available system uptime = 39 minutes Switchovers system experienced = 1 Standby failures = 0 Last switchover reason = user forced Hardware Mode = Duplex Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode = Disabled. SSO HSRP. Step 5. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. Note Enabling SSO initiates a controller reboot. When we simulate a problem by powering off the Active Controller, the standby controller will reboot, all of our APs loose. 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. Image Version = Cisco IOS Software, Catalyst L3 Switch Software (CAT9K_IOSXE),Experimental Version 16. Step 1. The DHCP high availability features are enabled by default when the redundancy mode of operation is set 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. 1. The switch is. You can use the switch switch-number role command to set the active and standby switch in 1:1 stack mode. It is setup in the below settings but I am not running a pair of these switches. Cisco Employee. 2(20)EWA 以降のリリースでサポートされます。. exit 6. 1. 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. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. The mode sso command can be entered only from within redundancy configuration mode. 2(20)EWA and later releases. 39. 2. The mode sso command can be entered only from within redundancy configuration mode. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. 0. Example: Device(config-red)# mode sso: Configures stateful switchover. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. This mode does not provide power redundancy. Cisco NSF helps to suppress routing flaps in SSO-enabled devices, thus reducing network instability. Step 1. The primary will reboot to enable sso and pull the config from the current active (secondary in this case) unit xml on boot. x [S2C-build-v16x_throttle-4064-/. Step 5: end. SSO refers to the implementation of Cisco IOS software that allows applications and features to maintain a defined state between an active and standby RP. 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 6. Step 4: mode sso. High Availability SSO Deployment Guide for Cisco Catalyst 9800 Series Wireless Controllers, Cisco IOS XE Amsterdam 17. In case of n+1 redundancy, access points are configured with primary, secondary, and tertiary controllers. 168. Usage Guidelines. Router(config)# mode sso. In this CCNP ENCOR lesson, we will focus on this redundancy mechanism. The switch is supports route processor redundancy (RPR). 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. 255. 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. Router(config)# mode sso. Dans cet exemple, la commutation avec état (SSO) haute disponibilité (HA) est configurée entre deux instances 9800-CL, qui exécutent la même version du logiciel Cisco IOS, qui ont été configurées avec des WMI séparés et avec une interface utilisateur graphique accessible à l'adresse. Enabling SSO reboots the controllers to negotiate the HA role as per the configuration performed. 48. SRM is inherent with SSO, which brings up the standby route processor. License for 100 APs, 96 APs in use. In software, supervisor engine redundancy is enabled by running the redundant supervisor engine in route processor redundancy (RPR) or stateful switchover (SSO) operating 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 =. Example: Device(config-red)# mode sso: Enables the redundancy mode of operation to SSO. Router(config)# mode sso. x. When a redundant supervisor engine runs in SSO mode, the redundant supervisor engine starts up in a fully-initialized state and synchronizes with the persistent configuration and the running configuration of the active supervisor engine. This feature is not supported on the C9500-12Q, C9500-16X, C9500-24Q, C9500-40X models of the Cisco Catalyst 9500 Series Switches. 12. Configured Redundancy Mode = sso. hw-switch switch 1 logging onboard message level 3. Step 5. Redundancy may not work due to differences between the Cisco IOS releases. Cisco StackWise Virtual Redundancy. Enters redundancy configuration mode. Enters redundancy configuration mode. 2(20)EWA and later releases. Redundancy may not work due to differences between the Cisco. 0. 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. Communications = Up. 6. Redundancy may not work due to differences between the Cisco IOS releases. 48. . Step 5:. auto-sync startup-config. Verifies that SSO is enabled. 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 this command is entered, the standby switch is reloaded and begins to work in SSO mode. 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. Router# configure terminal. The Cisco Nexus 9504, 9508, 9516,. 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 =. Enter configuration commands, one per line. Enters redundancy configuration mode. Note After configuring SSO mode, the standby RP will automatically reset. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. 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. 133，称为WLC2。. Step 5. end. In our example we are using the following IP addresses: WLC Active. Check the Current ISSU and Install States 7. The show redundancy and show issu state commands verify that redundancy mode is enabled and that SSO and NSF are configured. (RTU Evaluation License by now) - Network Connection beween the WLC5520: LAG. 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. 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. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. Sets the redundancy configuration mode to SSO on both the active and standby RP. 2. (NSF) with a stateful switchover (SSO) when a supervisor-level failure occurs. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. 1 onwards, the method to configure the gateway IP. 2(20)EWA and later releases. 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. in my case it was secondary. Usage Guidelines. SSO HSRP alters the behavior of HSRP when a device with redundant Route Processors (RPs) is configured for stateful switchover (SSO) redundancy mode. When a failover occurs, the standby device seamlessly takes over, starts performing traffic forwarding services, and maintains a dynamic routing table. Exits redundancy configuration mode and returns the switch to privileged EXEC mode. Step 4. exit Router(config)# exit. running with image version 8. Solved: Hi, I need help to get a HA SSO setup running. 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 Auto-Boot is Enabled 6. Step 2: mode sso Example: Switch (config-red)# mode sso Configures SSO. Step 4. Displays the operating. x（Catalyst 9200 スイッチ）コマンドリファレンス. Step 6. Step 5. When this command is entered, the redundant supervisor engine is reloaded and begins to work in SSO mode. Redundancy Mode (Operational) = sso Redundancy Mode (Configured) = sso Consolidated Platform Configuration Guide, Cisco IOS XE 3. 151. Router(config-red)# end. Enters redundancy configuration mode. The software upgrade procedure supported by supervisor engine redundancy allows you to reload the Cisco IOS software image on the redundant supervisor engine, and once complete, reload the active supervisor engine once. Example: Router(red-config)# exit: Exits to global configuration mode. Exits redundancy configuration mode and returns the switch to privileged EXEC mode. 2(20)EWA and later releases. Copy the New Image to be Upgraded / Downgraded ISSU Workflows - Actual Upgrade One Step Work Flow Three Step Work Flow Post ISSU Checklist Action. 133 voor de tweede, WLC2 genoemd. Router# copy running. Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode = Disabled Communications = Up Current Processor Information :-----Active Location = slot 1 Current Software state = ACTIVE Uptime in current state = 23 hours, 52 minutes Image Version = Cisco IOS Software [Fuji], Catalyst L3 Switch Software. = 0 Last switchover reason = active unit removed Hardware Mode = Duplex Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode =. Communications = Up . 10. Router (config-red)# mode sso. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. If you perform an online insertion and removal (OIR) of the module, the switch resets during the. Stateful Switchover is particularly useful in conjunction with Nonstop. 4. SSO is supported in Cisco IOS Release 12. 2. Enters redundancy configuration mode. IP-adres 10. Step 3:. 133，稱為WLC2。. Step 6: mode sso. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to privileged EXEC mode. 131. Router(config-red)# end. 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. 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. x. Switchovers system experienced = 5. If the command is not found in the Catalyst 4500 Command Reference, it is located in the larger Cisco IOS library. Cisco IOS XE Software, Version 17. show redundancy Redundant System Information :-----Available system uptime = 11 hours, 31 minutes Switchovers system experienced = 0 Standby failures = 0 Last switchover reason = none. Stateful Switchover is particularly useful in conjunction with Nonstop Forwarding. 12. 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. 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. 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. Enters global configuration mode. I am seeing the SSO is established. With RPR, the backup supervisor engine is partially initialized and must reload. 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. The mode sso command can be entered only from within redundancy configuration mode. A router in SSO redundancy mode checkpoints Layer 2 protocol states and line card operation. This mode utilizes two electrical grids, each one powering a half module within each power supply. 2SXF OL-3999-08 8. You can also manually initiate a switchover by entering the redundancy force switch-over command on the Cisco StackWise Virtual active supervisor in privileged EXEC mode. The software will prompt to reboot the Standby Supervisor (in slot 5) - confirm to reboot - exit configuration mode and save the configuration. Note Enabling SSO initiates a controller reboot. 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. mode SSO Router(config)# mode SSO. Step 4: mode sso. When a redundant supervisor engine runs in SSO mode, the redundant supervisor engine. Enters redundancy configuration mode. The software upgrade procedure supported by supervisor engine redundancy allows you to reload the Cisco IOS software image on the redundant supervisor engine, and once complete, reload the active supervisor engine. 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. The SSO/ISSU feature supports only the Cisco ASR 1000 Series Aggregation Services Routers intrachassis (RP-to-RP) SSO, but not the interchassis (Cisco ASR1K-to-Cisco ASR1K) SSO. x [S2C-build-v16x_throttle-4064-/. Note After configuring SSO mode, the standby RP will automatically reset. Hardware Mode = Duplex Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode =. Redundancy may not work due to differences between the Cisco IOS releases. Step 3. 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. Step 5. Check the Current ISSU and Install States 7. 0. To do this, we will use “redundancy” command under global configuration mode and after that we will select mode with “mode sso” command. Hi! A custommer of mine tried to configure HA AP-SSO with two 5508 controllers. The standby will sync its configuration from. Configuring Cisco NSF with SSO • FindingFeatureInformation,page1 • PrerequisitesforNSFwithSSO,page1 • RestrictionsforNSFwithSSO,page2. 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 =. If any of those mismatched commands are executed on the active switch, the standby. Cisco 5520 wireless LAN controller has a failover RP Port. 3 and 7. Cisco Employee. When this command is entered, the redundant supervisor engine is reloaded and begins to work in SSO mode. In an HA environment using FlexConnect locally switched clients, the client information might not show the username. This command has no. In software, supervisor engine redundancy is enabled by running the redundant supervisor engine in route processor redundancy (RPR) or stateful switchover (SSO) operating. 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. The two supervisors operate in an active/standby capacity in which only one of the supervisor modules is active at any. Last switchover reason = user_forced. The default mode for the Cisco uBR10012 universal broadband router is SSO. The following are the ways in which Cisco StackWise Virtual's. 1. 1. Enters redundancy configuration mode. Step 6. Enters redundancy configuration mode. Router# configure terminal. 0(22)S. Exits redundancy configuration mode and returns the switch to privileged EXEC mode. Communications = Up. their Capwap tunnel, APs and clients get disconnected. The default mode for the Cisco 7500 series routers is HSA. Configurations. Check if There is Sufficient Available Memory on Flash 4. SSO functions in networking devices (usually edge devices) that support dual RPs. 59. 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. SSO redundancy mode provides all the functionality of RPR+ mode in that IOS software is fully initialized on the both RSPs. Example: Device#. 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. config redundancy mode sso on primary. Maintenance Mode = Disabled. Step 3. main-cpu. SSO also synchronizes critical state information. show redundancy states. Example: Device(config-red)# mode sso: Configures stateful switchover. Example: Device(config-red)# mode sso: Configures stateful switchover. HSRP is SSO aware on interfaces that are configured for HSRP and the standby RP is automatically reset. For WLC 1, go to Monitor > Redundancy > Summary: b. configure redundancy mode ssoEnters redundancy configuration mode. Hope that helps! -Bradley Selzer. Enabling SSO reboots the controllers to negotiate the HA role as per the configuration performed. To enable Cisco StackWise Virtual on a switch, use the stackwise-virtual command in the global configuration mode. Cisco IOS XE Bengaluru 17. CiscoStackWiseVirtualRedundancy 15 SSORedundancy 15 NonstopForwarding 16 MultichassisEtherChannels 16 MECMinimumLatencyLoadBalancing 16 MECFailureScenarios 17. Hope that helps! -Bradley Selzer. My routers only show redundancy mode as none. SSO-The show module command displays Hot. Verifies that SSO is enabled. Router(config-red)# end. I Think that the righ status of SSO Configuration must be like: Hardware Mode = Duplex. Switch# show running-config. 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. Go to solution. Note Enabling SSO initiates a controller reboot. When this command is entered, the redundant supervisor engine is reloaded and begins to work in SSO mode. One switch is running 3. 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. mode sso. Usage Guidelines. First you can completely configure the first WLC as you wish. 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.