About sub-interfaces
tejasshenai
Newbie ✭
I have X0 interface as LAN and I have created 10 VLAN inside X0 so I want to communicate between all vlan and also all other sub interface must access the services that X0 main interface accessing. Please explain in brief.
Category: Entry Level Firewalls
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shiprasahu93
Moderator
No changes are required on the firewall for this. The switch port that connects to the X0 port of the firewall needs to be a trunk port so that all VLAN traffic can be carried to the firewall.
Thanks!
Shipra Sahu
Technical Support Advisor, Premier Services
1
Answers
Hi @TEJASSHENAI,
Thank you for visiting SonicWall Community.
This can be done by allowing access rules between the zones used on the interfaces.
Regards
Saravanan V
Technical Support Advisor - Premier Services
Professional Services
Hello @tejasshenai,
Since the sub-interfaces are created on the firewall, the inter-VLAN routing will automatically be handled by SonicWall. The communication between these VLANs depends on the access rules and what zones these sub-interfaces are added with. If they are created on zone LAN, the LAN to LAN access rule should already be set to allow communication.
You also need to make sure that the LAN switch has the right VLANs configured and the port connecting to X0 is a trunk port.
Thanks!
Shipra Sahu
Technical Support Advisor, Premier Services
Thank you.
Ok.but is it necessary to have same VLAN id on firewall as present on switch & if yes. then I have read the SonicWALL VLAN start from 2 and I have default VLAN 1 on my switch. so how to manage that?
@tejasshenai,
VLAN 1 is a native VLAN and is not tagged. The X0 itself belongs to VLAN 1 and I think the switch itself should also use VLAN 1 as the native VLAN.
Please use some higher VLAN IDs (usually above 50) for the sub-interfaces so that it does not collide with the internal VLANs used by the firewall.
Thanks!
Shipra Sahu
Technical Support Advisor, Premier Services
is it necessary to make X0 interface of firewall as trunk or it automatically handled by SonicWALL firewall.
Thanks!
What interal VLAN's does the SonicWall use and for what reason?
You'll find them at Network -> Switching -> VLAN Trunking -> Reserved VLAN Information
They are for connectivity between the internal switch and the firewall CPU. eg, X2 might be mapped to VLAN 2.
I think if you don't have a Switching menu then you don't need to worry about it.