To provide metadata service on isolated subnet, the DHCP agent send a static route to the guest to be able to join the metadata IP. This functionality was available through the flag 'enable_isolated_metadata'.
Thanks to the patch [1], now the DHCP agent determines a subnet is isolated if it doesn't contain router port.
The help message of the flag wasn't updated accordingly to this evolution.
To provide metadata service on isolated subnet, the DHCP agent send a static route to the guest to be able to join the metadata IP. This functionality was available through the flag 'enable_ isolated_ metadata' .
Thanks to the patch [1], now the DHCP agent determines a subnet is isolated if it doesn't contain router port.
The help message of the flag wasn't updated accordingly to this evolution.