Specifications

LAN Configuration

ProSAFE Gigabit Quad WAN SSL VPN Firewall SRX5308

Port-Based VLANs

The VPN firewall supports port-based VLANs. Port-based VLANs help to confine broadcast

traffic to the LAN ports. Even though a LAN port can be a member of more than one VLAN,

the port can have only one VLAN ID as its port VLAN identifier (PVID). By default, all four

LAN ports of the VPN firewall are assigned to the default VLAN, or VLAN 1. Therefore, by

default, all four LAN ports have the default PVID 1. However, you can assign another PVID to

a LAN port by selecting a VLAN profile from the drop-down list on the LAN Setup screen.

After you have created a VLAN profile and assigned one or more ports to the profile, you

need to enable the profile to activate it.

The VPN firewall’s default VLAN cannot be deleted. All untagged traffic is routed through the

default VLAN (VLAN1), which you need to assign to at least one LAN port.

Note the following about VLANs and PVIDs:

• One physical port is assigned to at least one VLAN.

• One physical port can be assigned to multiple VLANs.

• When one port is assigned to multiple VLANs, the port is used as a trunk port to connect

to another switch or router.

• When a port receives an untagged packet, this packet is forwarded to a VLAN based on

the PVID.

• When a port receives a tagged packet, this packet is forwarded to a VLAN based on the

ID that is extracted from the tagged packet.

When you create a VLAN profile, assign LAN ports to the VLAN, and enable the VLAN, the

LAN ports that are members of the VLAN can send and receive both tagged and untagged

packets. Untagged packets that enter these LAN ports are assigned to the default PVID 1;

packets that leave these LAN ports with the same default PVID 1 are untagged. All other

packets are tagged according to the VLAN ID that you assigned to the VLAN when you

created the VLAN profile.

This is a typical scenario for a configuration with an IP phone that has two Ethernet ports, one

of which is connected to the VPN firewall, the other one to another device:

Packets coming from the IP phone to the VPN firewall LAN port are tagged. Packets passing

through the IP phone from the connected device to the VPN firewall LAN port are untagged.

When you assign the VPN firewall LAN port to a VLAN, packets entering and leaving the port

are tagged with the VLAN ID. However

, untagged packets entering the VPN firewall LAN port

are forwarded to the default VLAN with PVID 1; packets that leave the LAN port with the

same default PVID 1 are untagged.

Note: The configuration of the DHCP options for the default VLAN is

described in Configure the IPv4 Internet Connection and WAN

Settings on page 29. For information about how to add and edit a

VLAN profile, including its DHCP options, see Configure a VLAN

Profile on page 88.