User's Manual

AirStream 4000/4001 WiMAX CPE User Manual

7.2 LAN Networking

An operation mode of Router or Bridge can be selected via Web management.

When choosing Router mode, you can also enable or disable DHCP Server, and configure LAN and DHCP

Server IP.

By default this DHCP server feature is enabled for LAN segment. A default IP address pool is allocated by the

CPE. It is not recommended to change this setting in general. If readers do wish to specify an IP pool manually,

please be reminded that the Gateway for LAN segment should be the IP address of CPE’s LAN interface.

Notice The Gateway for LAN segment is usually the LAN interface of the CPE. If the

IP pool for DHCP server is modified to other subnets, e.g. 192.168.1.0/24, the

Gateway and IP address for the CPE LAN interface should be modified

accordingly.

7.3 QoS & VLAN

The CPE data traffic are classified into three types and each can be marked with certain QoS priorities, at layer

two or layer three of the seven-layer OSI network model. At layer 2, 802.1p bits are used for QoS Marking. At

layer 3, the DSCP field in IP header is used for QoS marking as shown by the following diagram. Note that

DSCP and TOS marking cannot be configured at same time.

VLAN (Virtual Local Area Network) allows separation of traffic by a VLAN ID at layer two of the seven-layer

OSI network model. VLAN may facilitate implementation of security measures, and QoS treatment. The CPE

internally classifies traffic into three types, Voice (media and signaling), Data and Management traffic. The

traffic types can be tagged with designated VLAN ID. All ingress traffics from LAN port are treated as data.

VLAN tagging for CPE LAN traffic can be enabled or disabled. VLAN IDs for Voice, Data and CPE

Management traffic can be configured in this section. For the LAN port data, untagged LAN traffic will be

automatically tagged at the WAN interface according to the traffic type.