SonicWall Switch Getting Started Guide
Configuring Basic Topologies
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Configuring VLAN(s) With Dedicated
Uplink(s)
Topics:
•
Prerequisites for VLAN Support
•
Configuring a Dedicated Uplink for VLANs
Prerequisites for VLAN Support
•
Support for VLANs is available on dedicated and common uplinks. For example, VLANs can be configured
under firewall interfaces configured as a dedicated uplink. VLANs also can be configured under the
firewall interface provisioned as the common uplink for the Switch.
•
Overlapping VLANs cannot exist under appliance interfaces configured as dedicated uplinks to the same
Switch because VLAN space on the Switch is global. For example, if X3 and X5 are configured for
dedicated uplinks to the same Switch, VLAN 100 cannot be present under both X3 and X5. Such a
configuration is rejected. If X3 and X5 are dedicated uplinks to different Switches, however, then such a
configuration is accepted.
•
Overlapping VLANs cannot exist under common uplink interfaces. For example, if X3 is set up as a
common uplink to a Switch and VLAN 100 exists under X3, another interface that is configured as a
common uplink to a second Switch, for example, X4 cannot have a VLAN 100 sub-interface.
•
PortShielding of Switch interfaces to common uplink interfaces without selecting any VLANs for
access/trunk configuration is not supported.
Configuring a Dedicated Uplink for VLANs
Topics:
•
Dedicated Uplink for VLAN Topology
•
Configuring a Dedicated Uplink for a VLAN
Dedicated Uplink for VLAN Topology
In a dedicated uplink configuration, a given link between the firewall and the Switch designated as the dedicated
uplink is set up to carry traffic for all VLANs configured under the firewall interface plus PortShield traffic
corresponding to the firewall interface.
IMPORTANT:
To change the Reserved VLAN range on the firewall, do so before adding the
SonicWall Switch. If the Reserved VLAN range changes after connecting the Switch, then the Switch
must be removed and re-added.
NOTE:
VLANs must first be setup at the firewall interface.
