Juniper VLAN IP Address for Switch

Hello,

I'm totally confused on how to configure an IP for a management VLAN in juniper's switch.

I see two options online and I don't know what is correct, under VLAN or IRB

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Option 1:

set vlans MGMT vlan-id 10

set interfaces irb unit 10 family inet address 10.10.10.254/24

set vlans MGMT l3-interface irb.10

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Option 2:

set vlans MGMT vlan-id 10

set interfaces vlan unit 10 family inet address 10.10.10.254/24

set vlans MGMT l3-interface vlan.10