The default behavior of the Avi Load Balancer is to implicitly monitor all configured default gateways. If many default gateways are configured, it can lead to multiple ICMP echo request-reply messages between the Avi Load Balancer and the default gateways. You can deactivate internal gateway monitors and change the default setting of internal gateway monitors through CLI commands.
Deactivating Internal Gateway Monitor
Login to the Avi Load Balancer CLI and use the disable_gateway_monitor command to deactivate the internal gateway monitor. In the following example, the internal gateway monitor for the cloud named Default-Cloud is deactivated.
[admin: controller]: > terminal unhide [admin: controller]: > [admin: controller]: > [admin: controller]: > configure vrfcontext global Multiple objects found for this query. [0]: vrfcontext-72421d6e-1665-43aa-ae1e-b7147c3bfe52#global in tenant admin, Cloud MyLinux [1]: vrfcontext-108b944e-c2f6-497b-a20c-6d302a84a046#global in tenant admin, Cloud Default-Cloud Select one: 1 Updating an existing object. Currently, the object is: -----------------------------------------------------------------+ Field Value -----------------------------------------------------------------+ uuid vrfcontext-108b944e-c2f6-497b-a20c-6d302a84a046 name global static_routes[1] prefix 10.70.45.195/32 next_hop 10.70.45.1 route_id 1 system_default True tenant_ref admin cloud_ref Default-Cloud -----------------------------------------------------------------+ [admin: controller]: vrfcontext> [admin: controller]: vrfcontext> internal_gateway_monitor [admin: controller]: vrfcontext:internal_gateway_monitor> disable_gateway_monitor [admin: controller]: vrfcontext:internal_gateway_monitor> save
Use show vrfcontext global command to confirm the changes after deactivating the internal gateway monitor. The value for the flag disable-gateway-monitor is now changed to true
[admin: controller]: vrfcontext> show vrf [admin: controller]: vrfcontext> where Tenant: admin --------------------------------------------------------------------------+ Field Value --------------------------------------------------------------------------+ uuid vrfcontext-108b944e-c2f6-497b-a20c-6d302a84a046 name global static_routes[1] prefix 10.70.45.195/32 next_hop 10.70.45.1 route_id 1 system_default True internal_gateway_monitor disable_gateway_monitor True tenant_ref admin cloud_ref Default-Cloud --------------------------------------------------------------------------+ [admin: controller: vrfcontext> save
Changing Default Setting of Internal Gateway Monitor
Use the command configure vrfcontext global to change the default setting of internal gateway monitor.
Using the CLI, you can change the default value for the following settings for the internal gateway monitor:
Gateway monitor interval
Gateway monitor failure threshold
Gateway monitor success threshold
[admin:controller]: > [admin:controller]: > configure vrfcontext global Multiple objects found for this query. [0]: vrfcontext-72421d6e-1665-43aa-ae1e-b7147c3bfe52#global in tenant admin, Cloud MyLinux [1]: vrfcontext-108b944e-c2f6-497b-a20c-6d302a84a046#global in tenant admin, Cloud Default-Cloud Select one: 1 Updating an existing object. Currently, the object is: ------------------------------------------------------------------------------------+ Field Value ------------------------------------------------------------------------------------+ uuid vrfcontext-108b944e-c2f6-497b-a20c-6d302a84a046 name global static_routes[1] prefix 10.70.45.195/32 next_hop 10.70.45.1 route_id 1 system_default True internal_gateway_monitor gateway_monitor_interval 1000 milliseconds gateway_monitor_failure_threshold 10 gateway_monitor_success_threshold 15 disable_gateway_monitor True tenant_ref admin cloud_ref Default-Cloud ------------------------------------------------------------------------------------+ [admin:controller]: vrfcontext> [admin:controller]: vrfcontext> internal_gateway_monitor [admin:controller]: vrfcontext:internal_gateway_monitor> gateway_monitor_interval 2000 Overwriting the previously entered value for gateway_monitor_interval [admin:controller]: vrfcontext:internal_gateway_monitor> gateway_monitor_failure_threshold 20 Overwriting the previously entered value for gateway_monitor_failure_threshold [admin:controller]: vrfcontext:internal_gateway_monitor> gateway_monitor_success_threshold 20 Overwriting the previously entered value for gateway_monitor_success_threshold [admin:controller]: vrfcontext:internal_gateway_monitor> [admin:controller]: vrfcontext:internal_gateway_monitor> [admin:controller]: vrfcontext:internal_gateway_monitor> where Tenant: admin ----------------------------------------------------+ Field Value ----------------------------------------------------+ gateway_monitor_interval 2000 milliseconds gateway_monitor_failure_threshold 20 gateway_monitor_success_threshold 20 disable_gateway_monitor True ----------------------------------------------------+ [admin:controller]: vrfcontext:internal_gateway_monitor> save [admin:controller]: vrfcontext> save
