There is a command group 'az_network_vpn site'. This group of commands could 'manage vpn site configurations'. 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_update'.The syntax is: az network vpn-site update [--add]
                           [--address-prefixes]
                           [--asn]
                           [--bgp-peering-address]
                           [--device-model]
                           [--device-vendor]
                           [--force-string]
                           [--ids]
                           [--ip-address]
                           [--link-speed]
                           [--name]
                           [--no-wait]
                           [--peer-weight]
                           [--remove]
                           [--resource-group]
                           [--security-site {false, true}]
                           [--set]
                           [--site-key]
                           [--subscription]
                           [--tags]
                           [--virtual-wan]. The parameter '--add' is optional. add an object to a list of objects by specifying a path and key value pairs.  example: `--add property.listproperty <key=value, string or json string>`.. The parameter '--address-prefixes' is optional. space-separated list of cidr address prefixes.. 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 '--device-model' is optional. model of the device.. The parameter '--device-vendor' is optional. name of the device vendor.. The parameter '--force-string' is optional. when using 'set' or 'add', preserve string literals instead of attempting to convert to json.. 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 '--ip-address' is optional. ip address of the vpn site.. The parameter '--link-speed' is optional. link speed in mbps.. The parameter '--name -n' is optional. name of the vpn site config.. The parameter '--no-wait' is optional. do not wait for the long-running operation to finish.. The parameter '--peer-weight' is optional. weight added to routes learned from this bgp speaker.. The parameter '--remove' is optional. remove a property or an element from a list.  example: `--remove property.list <indextoremove>` or `--remove propertytoremove`.. 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 '--security-site' is optional. whether the vpn site is security-related.. The parameter '--set' is optional. update an object by specifying a property path and value to set.  example: `--set property1.property2=<value>`.. The parameter '--site-key' is optional. key for the vpn site that can be used for connections.. 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 '--tags' is optional. space-separated tags: key[=value] [key[=value] ...]. use "" to clear existing tags.. The parameter '--virtual-wan' is optional. name or id of the virtual wan.. 