On Cisco Catalyst 9400 Series Switches, applications can be hosted only on active supervisors. After a switchover, the AppGigbitEthernet interface on the newly active supervisor becomes active and can be used for application hosting. Application Hosting on Cisco Catalyst 9410 Series Switches In Cisco IOS XE Bengaluru 17.5.1, application hosting is supported on Cisco Catalyst 9410 Series Switches. To enable the AppGigabitEthernet interface for application hosting, configure the enable command in interface configuration mode. The enable command is available only on Cisco Catalyst 9410 Series Switches.
Note When using slot 4 of the 48-port linecard for application hosting, the port must be in the default shutdown mode. If slot 4 of the 48-port linecard is active, application hosting is rejected. If the linecard port is disabled, slot 4 of the 48-port linecard is marked as inactive . If slot 4 of the 48-port linecard is populated, the port 4/0/48 will not come up. If linecard 4 is empty or if it is a 24-port linecard, no ports are disabled. To enable the port (4/0/48), disable application hosting by using the no iox command. No system messages are displayed on the console when the port is enabled or disabled.
During an In-Service Software Upgrade (ISSU), the linecard port is not automatically disabled, because the AppGigabitEthernet interface has to be enabled. Before a software downgrade, the AppGigabitEthernet interface must be disabled to disable the front-panel port. Online Insertion and Removal Table 2: Online Insertion and Removal (OIR) Scenarios Application Hosting Application Hosting on Cisco Catalyst 9410 Series Switches OIR Scenario Action The linecard on slot 4 is empty, and the AppGigabitEthernet interface is enabled. No port is disabled. The linecard on slot 4 is a 48-port linecard, and the AppGigabitEthernet interface is enabled. Port 48 on slot 4 is disabled.
After the port is disabled, no configuration is applied to the port. Port 48 is marked as inactive. The linecard on slot 4 is a 24-port linecard. No port on slot 4 is disabled. The linecard on slot 4 is a 48-port linecard that is replaced by a 24-port linecard, and the AppGigabitEthernet interface is enabled. No port on slot 4 is disabled. The linecard on slot 4 is a 24-port linecard that is replaced by a 48-port linecard, and the AppGigabitEthernet interface is enabled. Port 48 on slot 4 is disabled. During OIR, the standby Supervisor becomes the new active, and the front-panel port on the new active is used for app hosting. No state change will happen to port 48 on slot 4.
The standby Supervisor OIR has no effect on the active Supervisor front-panel port. Application Hosting 8