How to increase number of routes per router exceeding default 30 routes in Openstack Platform 15

The max_routes parameter in neutron.conf can be increased to accommodate more routes per router.

# crudini --set  /var/lib/config-data/puppet-generated/neutron/etc/neutron/neutron.conf  DEFAULT max_routes 45

Restart the neutron_api service.

# podman restart neutron_api

This parameter must be set in neutron.conf after the service has been restarted, and then more than 30 routes can be added to a router.

# grep -i max_routes /var/lib/config-data/puppet-generated/neutron/etc/neutron/neutron.conf 
max_routes = 45

However, manually editing configuration changes are temporary. All configuration changes must be made through the Director for a permanent fix. Create a template wherein you set the desired value of max_routes parameter and pass this template as an environment file along with the rest of the templates in your deployment command.

[stack@undercloud-0 ~]$ cat increase_max_routes_per_router.yaml 
        value: 45

The changes will take effect after a stack update.

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