There is a command group 'az_network_vpn site_link'. This group of commands could 'manage vpn site link'. 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 site_link_add'.The syntax is: az network vpn-site link add --ip-address
                             --name
                             [--asn]
                             [--bgp-peering-address]
                             [--fqdn]
                             [--ids]
                             [--link-provider-name]
                             [--link-speed-in-mbps]
                             [--no-wait]
                             [--resource-group]
                             [--site-name]
                             [--subscription]. The 1th example of the child command would be to use it to 'add a vpn site link to vpn site configuration', the syntax is: az network vpn-site link add -g MyRG --site-name VpnSite -n VpnSiteLinkName --ip-address 10.0.1.111 --asn 1234 --bgp-peering-address 192.168.0.0. The parameter '--ip-address' is required. It is used to ip address of the vpn site.. The parameter '--name -n' is required. It is used to the name of vpn site link.. The parameter '--asn' is optional. bgp speaker's asn.. The parameter '--bgp-peering-address' is optional. peering address and bgp identifier of this bgp speaker.. The parameter '--fqdn' is optional. fqdn of vpn-site-link.. 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 '--link-provider-name' is optional. name of the link provider.. The parameter '--link-speed-in-mbps' is optional. link speed.. The parameter '--no-wait' is optional. do not wait for the long-running operation to finish.. 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 '--site-name' is optional. name of the vpn site config.. The parameter '--subscription' is optional. name or id of subscription. you can configure the default subscription using `az account set -s name_or_id`.. 