update default value for az network lb outbound-rule create --allocated-outbound-ports

[cozhang8]

Describe the bug

Currently, the default value for --allocated-outbound-ports is 1024 when creating an outbound rule for Azure Load Balancer (az network lb outbound-rule create). This default value can be an issue for customers as it can cause SNAT port exhaustion depending how many instances they have deployed.

Request: change the default value to 0 which will also align with the powershell default value.

https://learn.microsoft.com/en-us/cli/azure/network/lb/outbound-rule?view=azure-cli-latest
https://learn.microsoft.com/en-us/powershell/module/az.network/add-azloadbalanceroutboundruleconfig?view=azps-13.4.0

Related command

az network lb outbound-rule create --allocated-outbound-ports

change default of the above command to 0.

Errors

The default value is currently 0 for allocated outbound ports.

Issue script & Debug output

The current default value is 1024, need to update to 0.

Expected behavior

Update default value to 0 allocated outbound ports.

Environment Summary

azure-cli 2.71.0

Additional context

No response

[yonzhan]

Thank you for opening this issue, we will look into it.

[necusjz]

both --allocated-outbound-ports in cli and AllocatedOutboundPort is ps don't have any default values from the client side.

[cozhang8]

when using az network lb outbound-rule create, the allocated outbound ports is 1024, is it possible to ensure the value is set to 0 instead?

when using Add-AzLoadBalancerOutboundRuleConfig, the allocated outbound ports is 0.

[necusjz]

could you provide the debugging log with appending --debug?

[cozhang8]

can you help elaborate how I can provide the debugging log with --debug? should I rerun the create command? It's not really a "bug" per se, it's not setting it to the correct value.

for cli, I created an LB outbound rule with az network lb outbound-rule create and did not use the --allocated-outbound-ports property. once it was created, it automatically created it with 1024 allocated outbound ports instead of 0.

[necusjz]

@cozhang8 az network lb outbound-rule create xxxx --debug, i wanna check the request/response body.