There is a command group 'az_networkfabric_nni'. This group of commands could 'manage network to network interconnect resource'. 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_networkfabric_nni_create'.The syntax is: az networkfabric nni create --fabric
                            --resource-group
                            --resource-name
                            --use-option-b {false, true}
                            [--egress-acl-id]
                            [--export-route-policy]
                            [--import-route-policy]
                            [--ingress-acl-id]
                            [--is-management-type {false, true}]
                            [--layer2-configuration]
                            [--nni-type {ce, npb}]
                            [--no-wait {0, 1, f, false, n, no, t, true, y, yes}]
                            [--npb-static-route-configuration]
                            [--option-b-layer3-configuration]. The 1th example of the child command would be to use it to 'create a network to network interconnect', the syntax is: az networkfabric nni create --resource-group "example-rg" --fabric "example-fabric" --resource-name "example-nni" --nni-type "CE" --is-management-type "True" --use-option-b "True" --import-route-policy "{importIpv4RoutePolicyId:'/subscriptions/xxxxx-xxxx-xxxx-xxxx-xxxxx/resourceGroups/example-rg/providers/microsoft.managednetworkfabric/routePolicies/example-routepolicy',importIpv6RoutePolicyId:'/subscriptions/xxxxx-xxxx-xxxx-xxxx-xxxxx/resourceGroups/example-rg/providers/microsoft.managednetworkfabric/routePolicies/example-routepolicy'}" --export-route-policy "{exportIpv4RoutePolicyId:'/subscriptions/xxxxx-xxxx-xxxx-xxxx-xxxxx/resourceGroups/example-rg/providers/microsoft.managednetworkfabric/routePolicies/example-routepolicy',exportIpv6RoutePolicyId:'/subscriptions/xxxxx-xxxx-xxxx-xxxx-xxxxx/resourceGroups/example-rg/providers/microsoft.managednetworkfabric/routePolicies/example-routepolicy'}" --layer2-configuration "{interfaces:['resourceId'],mtu:1500}" --option-b-layer3-configuration "{peerASN:28,vlanId:501,primaryIpv4Prefix:'172.31.0.0/31',secondaryIpv4Prefix:'172.31.0.20/31'}". The 2th example of the child command would be to use it to 'help text for sub parameters under the specific parent can be viewed by using the shorthand syntax       see https   github com azure azure cli tree dev doc shorthand_syntax md for more about shorthand syntax', the syntax is: az networkfabric nni create --layer2-configuration "??". The parameter '--fabric --fabric-name' is required. It is used to name of the network fabric.. The parameter '--resource-group -g' is required. It is used to name of resource group. you can configure the default group using `az configure --defaults group=<name>`.. The parameter '--resource-name' is required. It is used to name of the network to network interconnect.. The parameter '--use-option-b' is required. It is used to selection of option b for nni. example: true.. The parameter '--egress-acl-id' is optional. egress acl arm resource id.. The parameter '--export-route-policy' is optional. export route policy configuration.  support shorthand-syntax, json-file and yaml-file. try "??" to show more.. The parameter '--import-route-policy' is optional. import route policy configuration.  support shorthand-syntax, json-file and yaml-file. try "??" to show more.. The parameter '--ingress-acl-id' is optional. ingress acl arm resource id.. The parameter '--is-management-type' is optional. configuration to use nni for infrastructure management. default value is true. example: true.. The parameter '--layer2-configuration' is optional. common properties for layer2 configuration.  support shorthand-syntax, json-file and yaml-file. try "??" to show more.. The parameter '--nni-type' is optional. usage type of nni. default value is ce. example: ce.. The parameter '--no-wait' is optional. do not wait for the long-running operation to finish.. The parameter '--npb-static-route-configuration' is optional. npb static route configuration properties.  support shorthand-syntax, json-file and yaml-file. try "??" to show more.. The parameter '--option-b-layer3-configuration' is optional. common properties for layer3configuration.  support shorthand-syntax, json-file and yaml-file. try "??" to show more.. 