Obihai OBi110 Administration Manual page 17

VLAN Support in Router Mode
In router mode, the OBi202 can support VLAN (802.1Q) on the WAN side. When VLAN is enabled, incoming packets from
the WAN side not belonging to the same VLAN are dropped, while all outgoing packets to the WAN side are tagged with the
configured VLAN ID. The VLAN support is transparent to the devices on LAN side. The router removes the VLAN tag when
forwarding packets to the LAN side.
LAN Switching Features
Instead of acting as a router, the OBi202 can be set to work as a 3-port switch. One of the ports is internal and is used by
the OBi202 CPU only, while the two external ports (labelled as Internet and LAN) can be connected to other devices. This
mode of operation is known as the bridge mode. In this mode, all the router features, such DHCP server, firewall and port
forwarding, will not take effect. The QoS policy in this case is hardwired such that the native voice and related traffic will
always have highest priority (this behavior is not configurable). Furthermore, accessing the OBi device management web
pages from either of the two external ports is always allowed.
VLAN Support in Bridge Mode
When VLAN is enabled, packets sent to the OBi not belonging to the same VLAN are dropped, while packets sent by the OBi
are tagged with the configured VLAN ID. The packets switched directly between the external ports, on the other hand, are
not modified by the OBi.
Copyright 2010-2012 Obihai Technology, Inc. 17