Product Info

Chapter 3: Advanced Configuration Network
Page
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DHCP packet from the WAN interface to the LAN interface. Local DHCP
service will not allocate IP to clients of LAN port.
Local Service
Gateway will not forward DHCP packets between LAN and WAN, it also
blocks DHCP packets from the WAN port. Clients connected to the LAN
port can get IP from DHCP server run in gateway.
VLAN Mode
Disable The WAN interface is untagged. LAN is untagged.
Enable The WAN interface is tagged. LAN is untagged.
Trunk Only valid in bridge mode. All ports, including WAN and LAN, belong to
this VLAN Id and all ports are tagged with this VLAN id. Tagged packets
can pass through WAN and LAN.
VLAN ID Set the VLAN ID.
Note
Multiple WAN connections may be created with the same
VLAN ID
802.1p Set the priority of VLAN, Options are 0~7.
Q-in-Q
Q-in-Q tunneling allow service providers to create a Layer 2 Ethernet connection between two
customer sites. Providers can segregate different customers’ VLAN traffic on a link (for example, if
the customers use overlapping VLAN IDs) or bundle different customer VLANs into a single service
VLAN. Data centers can use Q-in-Q tunneling to isolate customer traffic within a single site or to
enable customer traffic flows between cloud data centers in different geographic locations. Q-in-Q
tunneling adds a service VLAN tag (802.1Q based) before the customer’s 802.1Q VLAN tags.
In Q-in-Q tunneling, as a packet travels from a customer VLAN (C-VLAN) to a service provider's or
data center VLAN (S-VLAN), another 802.1Q tag for the appropriate S-VLAN is added before the C-
VLAN tag. The C-VLAN tag remains and is transmitted through the network. As the packet leaves
the S-VLAN in the downstream direction, the S-VLAN 802.1Q tag is removed.
Figure 5 Q-in-Q Frame Format