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. Step 5. 6. 12. Sets the router in SSO redundancy mode. Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode = Disabled Communications = Up Current Processor Information :----- Active Location = slot 1/2 Current Software state = ACTIVE Uptime in current state = 36 minutes Image Version = Cisco IOS Software, s2t54 Software (s2t54-ADVENTERPRISEK9-M),SSO is supported in Cisco IOS Release 12. 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. 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. Check the Current ISSU and Install States 7. Router# configure terminal Router(config)# redundancy Router(config)# mode SSO Router(config)# exit Router# reload Stateful Switchover. (NSF) with a stateful switchover (SSO) when a supervisor-level failure occurs. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. Example: Device(config-red)# mode sso: Configures stateful switchover. Example: Device(config-red)# end: Exits redundancy configuration mode and. Switchover Time. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to privileged EXEC mode. General Restrictions Two RPs must be installed in the chassis, each running the same version of the Cisco IOS software. When this command is entered, the standby supervisor module is reloaded and begins to work in SSO mode. 39. 1. Step 6. SSO is supported in Cisco IOS Release 12. Recovery Mode Yes Yes Default GW Check Yes Yes LACP, PAGP with SSO No Yes SMU for controller patching No Yes. 56. If a VSS does not meet the requirements for SSO redundancy, it will be incapable of establishing a relationship with the peer 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 =. Step 2: mode sso. Follow these guidelines when configuring your system to SSO mode: You must use identical Cisco IOS images on the switches in the stack to support SSO mode. Only the top two ports are. Step 5: exit. 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. auto-sync standard. mode sso. The ISSU feature allows deployment of new features, hardware, services, and maintenance fixes in a procedure that is seamless to end users. 0. Displays the operating redundancy mode. 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. 255. SSO Operation. x [S2C-build-v16x_throttle-4064-/. Step 5. 150. 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. 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. Redundancy may not work due to differences between the Cisco IOS releases. • 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. 254. Step 5: Enabling SSO reboots the controllers to negotiate the HA role as per the configuration performed. SSO is supported in Cisco IOS Release 12. Step 5. Router(config-red)# end. 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. Step 6. 39. Example: Device (config-red)# mode sso: Configures SSO. 2. 10. There is no way i can change it to redundancy mode SSO. My routers only show redundancy mode as none. For Enterprise Services or IP Base mode, use ISSU to upgrade software for both RPR and SSO redundant mode. 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. Step 5. Step 4. = Non-redundant Redundancy Mode (Configured) = sso Redundancy State = Non. To. Use the power redundancy-mode {combined. Router(config-red)# end. Catalyst 4500 series switches allow a standby supervisor engine to take over if the active supervisor engine fails. There are three modes in redundancy for the standby supervisor when native Cisco IOS Software is used: RPR-The show module command displays Cold. SSO functions in networking devices (usually edge devices) that support dual RPs. 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. The following example displays verification that the system is in SSO mode and that slot A—RP A is the active R, and slot B—RP B is the standby RP. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. Reason: Software version. Manual Swact = enabled . Enters redundancy configuration mode. Redundancy may not work due to differences between the Cisco IOS releases. Step 4. Router(config)# mode sso. mode SSO 5. 2. SSO is supported in Cisco IOS Release 12. Cisco NSF works with the SSO feature. Redundancy-MGNT: 192. Exits redundancy configuration mode and returns the switch to privileged EXEC mode. I try to setup HA with SSO with 2x WLC 5520 version 8. Configures SSO. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. see. 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. 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. Configuration Examples for DHCP High Availability. 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. By default, the system synchronizes all system files, which is the typical setting for most applications. Step 4: mode SSO Example: Router(config)# mode SSO: Configures SSO. . 2016-10-12 10:10 AM 2017-09-01 03:01 AM 更新. 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. Wrong handling can happen and. “Configuring NSF with SSO Supervisor Engine Redundancy”). 05 Model Number : C9606R Model Number : C9606R: CAT9600#sh redundancy Hardware Mode = Duplex Configured Redundancy Mode = sso Operating Redundancy Mode = sso Active Location = Switch 2 Current Software state = ACTIVE Standby Location = Switch 1 Current Software state = STANDBY HOT: CAT9600#show license summary With Stateful Switchover (SSO), Cisco IOS routers with dual RPs can synchronize router configuration and control plane state information. Note Recommended procedure for ROMMON upgrade of Supervisor in VSS Quad-Sup SSO (V4SO): Use the command upgrade rom-monitor to upgrade the ROMMON image, preference region/invalidate region on current active Supervisor. 5. Step 2. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. 11 peer-redundancy-management 10. Configures SSO. Example: Device(config-red)# mode sso: Configures stateful switchover. 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. This mode utilizes two electrical grids, each one powering a half module within each power supply. mode SSO Router(config)# mode SSO. Check if Auto-Boot is Enabled 6. If the command is not found in the Catalyst 4500 Command Reference, it is located in the larger Cisco IOS library. Exits redundancy configuration mode and returns the switch to privileged EXEC mode. in my case it was secondary. Step 4. Redundancy may not work due to differences between the Cisco. Table 13-5 details the redundancy modes you can configure on supported switch platforms. 0. When a failover occurs, the standby device seamlessly takes over, starts performing traffic forwarding services, and maintains a dynamic routing table. = SSO Redundancy Mode (Configured) = SSO Redundancy State = Non Redundant Manual Swact = disabled (system is simplex (no peer unit)) Communications = Down Reason:. 2(20)EWA and later releases. 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. 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. 0(22)S. Operating Redundancy Mode = sso Maintenance Mode = Disabled Communications = Up Current Processor Information :----- Active Location = slot 2. When a redundant supervisor engine runs in SSO mode, the redundant supervisor engine. 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. Step 6. 4. Once you get them on the same version, you will be able to get to SSO. When you configure the controller for HA SSO, the Cisco 600 Series OfficeExtend Access Points are not supported. insrc-redundant. 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. Redundancy Mode (Configured) = sso . First you can completely configure the first WLC as you wish. Switch(config-red)# end. Exits redundancy configuration mode and returns the switch to privileged EXEC 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. = Non-redundant Redundancy Mode (Configured) = sso Redundancy State = Non Redundant. Step 5:. configure redundancy mode ssoEnters redundancy configuration mode. Last switchover reason = none. SSO is supported in Cisco IOS Release 12. If the HA unit is not an HA sku, then you need a minimum of 50 ap license. Sets the redundancy configuration mode to SSO on both the active and standby RP. 2(20)EWA and later releases. main-cpu. 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 =. Switch# show running-config. Step 4: mode SSO Example: Router(config)# mode SSO Configures SSO. 9800 WLC-1# show redundancy Redundant System Information : ----- Available system uptime = 1 hour, 35 minutes Switchovers system experienced = 0 Standby failures = 0 Last switchover reason = none Hardware Mode = Duplex Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode = Disabled Communications = Up Current. Step 5: Enabling SSO reboots the. If you perform an online insertion and removal (OIR) of the module, the switch resets during the stateful switchover and the. 1 Disabling SSO on HA Pair 1 On primary controller, disable SSO using the command: config. Redundancy may not work due to differences between the Cisco IOS. 5 and the other is running 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. Usage Guidelines. Displays the operating. What is redundancy mode? 3. Introduction; Whats New in Cisco IOS XE Dublin 17. Configured Redundancy Mode = sso. End with CNTL/Z. And the output of the "show redundancy" is: Hardware Mode = Duplex. With NSF/SSO, peer networking devices do not experience routing flaps. In SSO mode . This feature also functions in an nonstop forwarding (NSF) and stateful switchover (SSO) environment. 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. Enters redundancy configuration mode. end. configure interface address redundancy-management 10. Device(config-red)# mode sso: Configures stateful switchover. When this command is entered, the redundant supervisor engine is reloaded and begins to work in SSO mode. Operating Redundancy Mode = RPR. When this command is entered, the standby switch is reloaded and begins to work in SSO mode. 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. Example: Router(red-config)# mode sso: Sets the redundancy configuration mode to SSO. config redundancy mode sso. 0. 3. 0. Step 2: mode sso. We will definitely upgrade are fus code. Step 3. When two versions of Cisco IOS images are involved, the command sets supported by two images might differ. The two supervisors operate in an active/standby capacity in which only one of the supervisor modules is active at any given time, while. Step 4: mode sso. The DHCP high availability features are enabled by default when the redundancy mode of operation is set to SSO. If it is in ROMMON, try boot with manual "boot" command. Maintenance Mode = Disabled. 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 4. 5) Bring up only one Gig interface and try to access it. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. ) To minimize down time during software changes on the supervisor engine, load the new image onEnters redundancy configuration mode. The default mode for the Cisco 7500 series routers is HSA. Switch(config-red)# mode sso. Sets the redundancy configuration mode to SSO on both the active and standby RP. HSRP is SSO aware on interfaces that are configured for HSRP and the standby RP is automatically reset. 3 and 7. Step 4. SSO is supported in Cisco IOS Release 12. 2(20)EWA 以降のリリースでサポートされます。. Enter configuration commands, one per line. Step 5. Enabling SSO reboots the controllers to negotiate the HA role as per the configuration performed. The SSO model monitors the health of the active controller via a redundant (HA) port. SSO is supported in Cisco IOS Release 12. 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. Both RPs are running the same Cisco. Cisco 3504 Controllers. Note After configuring SSO mode, the standby RP will automatically reset. Redundancy may not work due to differences between the Cisco IOS. 56. config redundancy mode sso. Wrong handling can happen and. 0. 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. 4. end. 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. The default mode for the Cisco uBR10012 universal broadband router is SSO. Follow these guidelines when configuring your system to SSO mode: You must use identical Cisco IOS images on the switches in the stack to support SSO mode. The show redundancy and show issu state commands verify that redundancy mode is enabled and that SSO and NSF are configured. SSO HSRP. This feature is not supported on the C9500-12Q, C9500-16X, C9500-24Q, C9500-40X models of the Cisco Catalyst 9500 Series Switches. Step 5: exit. 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 =. In case of n+1 redundancy, access points are configured with primary, secondary, and tertiary controllers. 1. 4. This chapter describes how to configure supervisor engine redundancy using Cisco nonstop forwarding (NSF) with stateful switchover (SSO). Enters redundancy configuration mode. Router(config-red)# end. On primary controller, disable SSO using the command: Config redundancy mode disable The Active and Standby WLCs. [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. 6. The new High Availability (HA) feature (that is, AP SSO) set within the Cisco Unified Wireless Network software release version 7. 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 mode does not provide power redundancy. Communications = Up . 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 this command is entered, the redundant supervisor engine is reloaded and begins to work in SSO mode. SSO HSRP. redundancy 4. Enters redundancy configuration mode. Note After configuring SSO mode, the standby RP will automatically reset. SSO HSRP alters the behavior of HSRP when a device with redundant Route Processors (RPs) is configured for stateful switchover (SSO) redundancy 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. Enter configuration commands, one per line. Step 3. When this command is entered, the redundant supervisor engine is reloaded and begins to work in SSO mode. SSO Dual-Route Processors and Cisco Nonstop Forwarding. 1. Connect with console to it and check which state it is in. Maintenance Mode = Disabled . 配置. Cisco Employee. 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. Step 2. Since we couldnt afford downtime I rebooted standby controller that was in maintenance mode and it was able to boot in sso redundant mode. Router(config)# mode sso. While implementing Nonstop Forwarding (NSF) technology in systems using SSO. redundancy. config redundancy mode sso. 1. 255 ! interface GigabitEthernet1/0/4 ip vrf forwarding vpn1 ip address 10. you then add the SSO redundancy commands on the active supervisor and you can insert the prepared new supervisor. 0. 3 and 7. Step 5. Example: Router(config)# end. Step 6. Redundancy Mode (Configured) = sso Redundancy State = sso Maintenance Mode = Disabled Manual Swact = enabled Communications = Up client count = 115Operating Redundancy Mode = RPR. 10. 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. Step 3. The default standby power supply slot is PS8. The Cisco Nexus 9504, 9508, 9516,. 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. auto-sync bootvar. 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. Redundancy may not work due to differences between the Cisco. Configured Redundancy. 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 4: mode sso. 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. Check the Boot Mode 3. end. 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. SSO HSRP alters the behavior of HSRP when a device with redundant Route Processors (RPs) is configured for stateful switchover (SSO) redundancy mode. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. Supervisor engine redundancy allows OIR of the redundant supervisor engine for maintenance. configure redundancy unit secondary. The mode sso command can be entered only from within redundancy configuration mode. Step 5. 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. Active WLC 上で SSO の mode を disable にする. 39. You usually will find the two redundancy terms together, as "SRM with SSO. Step 5. 150. Step 3. Example: Device(config-red)# exit: Exits redundancy. Cisco HA architecture is based on redundant Route Processors and the NSF and SSO features, such that ports stay active and calls do not drop, eliminating network disruption during upgrades. Step 6. 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 =. 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. SSO is supported in Cisco IOS Release 12. Step 4. 6. Check if Auto-Boot is Enabled 6. It is not necessary to configure the IP address for the redundancy VLAN because the IP address is automatically generated. 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. Redundancy Mode (Configured) = sso Redundancy State = sso Maintenance Mode = Disabled Manual Swact = enabled Communications = Up client count = 115Cisco 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. How To Configure Route Processor Redundancy. Stateful Switchover is particularly useful in conjunction with Nonstop Forwarding. 1 onwards, the method to configure the gateway IP. Step 5. 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. 4) Once WLC is back verify the Boot image version is matching with the Primary. mode sso. Step 2. Step 4. while restarting the secondary WLC that was in maintenance mode, check the "Bulksync status" of redundancy summary in primary WLC and wait for until it turn as. 2(20)EWA and later releases. Step 5. 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. x. Router(config)# mode sso. Communications = Up. and the redundant supervisor engine boots into a partially-initialized state in RPR mode and a fully-initialized state in SSO mode. Step 5. Router# copy running. Enters redundancy configuration mode. Example: Device(config-red)# end: Exits redundancy configuration mode and returns to. The feature is enabled by default when the redundancy mode of operation is set to 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. 90. 90. Note Enabling SSO initiates a controller reboot. It is setup in the below settings but I am not running a pair of these switches. Step 6 . SSO also synchronizes critical state information. Usage Guidelines. Combined. Book Contents Book Contents. If any of those mismatched commands are executed on the active switch, the standby. Step 2: mode sso . Router(config)# mode sso. Example: Router(config)# exit Example: Router # Enters redundancy configuration mode. Example: Device(config-red)# end: Exits redundancy configuration mode and. Step 5: redundancy.