There is a command group 'az_network_vpn gateway_connection_vpn site link conn'. This group of commands could 'manage site to site vpn gateway connection vpn site link connection'. The group of commands has global parameter '--debug' which means 'Increase logging verbosity to show all debug logs.'. The group of commands has global parameter '--help -h' which means 'Show this help message and exit.'. The group of commands has global parameter '--only-show-errors' which means 'Only show errors, suppressing warnings.'. The group of commands has global parameter '--output -o' which means 'Output format.'. The group of commands has global parameter '--query' which means 'JMESPath query string. See <a href="http://jmespath.org/">http://jmespath.org/</a> for more information and examples.'. The group of commands has global parameter '--subscription' which means 'Name or ID of subscription. You can configure the default subscription using `az account set -s NAME_OR_ID`.'. The group of commands has global parameter '--verbose' which means 'Increase logging verbosity. Use --debug for full debug logs.'. This group contains a child command 'az_network_vpn gateway_connection_vpn site link conn_add'.The syntax is: az network vpn-gateway connection vpn-site-link-conn add --vpn-site-link
                                                         [--connection-bandwidth]
                                                         [--connection-name]
                                                         [--enable-bgp {false, true}]
                                                         [--gateway-name]
                                                         [--ids]
                                                         [--name]
                                                         [--no-wait]
                                                         [--rate-limiting {false, true}]
                                                         [--resource-group]
                                                         [--routing-weight]
                                                         [--shared-key]
                                                         [--subscription]
                                                         [--use-local-azure-ip-address {false, true}]
                                                         [--use-policy-based-traffic-selectors {false, true}]
                                                         [--vpn-connection-protocol-type {ikev1, ikev2}]
                                                         [--vpn-link-connection-mode {default, initiatoronly, responderonly}]. The 1th example of the child command would be to use it to 'add a vpn site link connection to site to site vpn gateway connection', the syntax is: az network vpn-gateway connection vpn-site-link-conn add -g MyRG --connection-name MyConnection --gateway-name MyGateway -n MyVPNSiteLinkConn --vpn-site-link /subscriptions/MySub/resourceGroups/MyRG/providers/Microsoft.Network/vpnSites/MyVPNSite/vpnSiteLinks/vpnsitelink --vpn-connection-protocol-type IKEv2. The parameter '--vpn-site-link' is required. It is used to the resource id of vpn site link.. The parameter '--connection-bandwidth' is optional. expected bandwidth in mbps.. The parameter '--connection-name' is optional. name of the vpn gateway connection.. The parameter '--enable-bgp' is optional. enable bgp.. The parameter '--gateway-name' is optional. name of the vpn gateway.. The parameter '--ids' is optional. one or more resource ids (space-delimited). it should be a complete resource id containing all information of 'resource id' arguments. you should provide either --ids or other 'resource id' arguments.. The parameter '--name -n' is optional. name of the vpn site link connection.. The parameter '--no-wait' is optional. do not wait for the long-running operation to finish.. The parameter '--rate-limiting' is optional. enable rate limiting.. The parameter '--resource-group -g' is optional. name of resource group. you can configure the default group using `az configure --defaults group=<name>`.. The parameter '--routing-weight' is optional. routing weight.. The parameter '--shared-key' is optional. shared key.. The parameter '--subscription' is optional. name or id of subscription. you can configure the default subscription using `az account set -s name_or_id`.. The parameter '--use-local-azure-ip-address' is optional. use local azure ip to initiate connection.. The parameter '--use-policy-based-traffic-selectors' is optional. enable policy-based traffic selectors.. The parameter '--vpn-connection-protocol-type' is optional. connection protocol used for this connection.. The parameter '--vpn-link-connection-mode' is optional. vpn link connection mode.. 