B&B Electronics WLNN-AN(ER,SE,SP.EK)-DP551 - Manual - Manual (Page 53)

Airborne Enterprise CLI Reference Manual 53
The client setting must be used when the module is to be used as a serial device
server and no Ethernet to 802.11 bridging will be required. In this configuration
the Ethernet or 802.11 interfaces will be network clients to which the serial ports
will tunnel and establish data connections. In this mode only one of the network
interfaces (Ethernet or 802.11) is allowed to support DHCP, the other must use a
static IP address.
The bridge setting must be used when the device is to be an Ethernet Client
adapter, where data bridging between the Ethernet and 802.11 interfaces will be
used. In this mode the module will forward all packets between the Ethernet and
802.11 interfaces. The Ethernet IP configuration is used and the 802.11 IP
configuration is ignored. If traffic to any of the configured ports (http, telnet, ftp,
ssh, etc) need to pass through the module, then the ports need to be
reconfigured to use non-default settings.
For router and bridge modes, if the network is configured to not allow multiple
MAC address for the same IP address, MAC address cloning should be enabled.
MAC address cloning will cause the WLAN module to adopt the MAC address of
the first Ethernet client that it sees traffic from. If the Ethernet client uses DHCP,
the module will sniff the DHCP transactions and learn the MAC and IP that the
client will use, and adopts them as its own. When in bridge mode, this makes the
module look like a “cable replacement” and should be transparent to the network.
The following tables (Table 7, Table 8, and Table 9) address the specific
requirements for each mode and identify the relayed parameters for correct
configuration.
Table 7 - Configuring the Ethernet Module as a Router
Command Description
eth-role router
This configures the Ethernet interface as the gateway for the
Ethernet connected network and as a NAT3 router.
eth-ip
This is the base IP address of the private network DHCP server
address pool, and is the first IP address the DHCP server will
lease to a client on the private network when the client is
using DHCP. It is also the default private network IP address
used for forwarding traffic from the public network.
This address must match the private network client IP address
when a single client is attached and is using a static IP
address. If this does not match the address, traffic from the
public network will NOT be routed correctly.
When using static IP addresses it is necessary for the Ethernet
host to be capable of responding to the ICMP ARP protocol or
for the host to issue a Gratuitous ARP. This is required to
make sure wireless traffic is routed correctly.
Traffic originating from Ethernet clients will be routed
correctly.
eth-subnet
This is the subnet mask the DHCP server will provide to the
client when the client is using DHCP.
eth-gateway
This is the IP address of the Ethernet Interface on the
Airborne Ethernet Bridge and is the target address for
communications between the Ethernet client and the Airborne
Bridge.