Mushroom Networks Documentation

WAN Configuration Guide


For each wired WAN port there is a corresponding status row on the HOME tab. Each port is labeled with an index from 1 to 4 (or 2,8 or 12 depending on the model) (WAN1 to WAN4) which is visible on the front panel of the BBNA as well as in the first (leftmost) column of the tab of the BBNA Management Interface.

Each active wired WAN port on the BBNA connected to a modem (e.g. DSL, cable) needs to be configured with an IP address. To configure a wired WAN port, click on the corresponding port index in the first column of the tab. If the wired WAN port is not being used, select the “DISABLE” radio button and click “OK”.  Otherwise, select the “ENABLE” radio button and select the configuration mode for the WAN port, either DHCP, Static, PPPoE, or Pass Through, as appropriate.


After configuring each wired WAN port, click “OK” to save the corresponding WAN port settings.

Since there is probably more than one service account being used with the BBNA, check carefully to make sure the information entered corresponds to the correct modem and port index as determined by how the modems are connected to the BBNA with the Ethernet cables.

Once a WAN port is configured, the “IP Address” column for the corresponding row will be filled in automatically. The “External IP Address” is the IP address that can be used to reach the corresponding WAN port from the Internet. This address will usually differ from the IP address of the WAN port when a dynamic IP address is assigned via DHCP. The “Status” column corresponding to the WAN port will be updated, as appropriate.

For each active WAN port, the menu will show the rate information on each interface for monitoring the status of each Internet connection in real time.


This is the default configuration mode for each wired WAN port on the BBNA. Typically a DSL or cable modem will have a DHCP server which is capable of assigning an IP address, called a dynamic IP address. In this case the DSL or cable modem will automatically configure the attached wired WAN port on the BBNA and no user configuration is necessary. Optionally, alternate DNS servers may be specified that override those that are provided by the modem. 

Static IP

If a static IP address is assigned to a service account from the ISP, then the Static IP mode should be selected for the corresponding BBNA wired WAN port. The assigned static IP address will need to be entered in the user configuration tab for the corresponding BBNA wired WAN port. If the ISP has assigned several static IP addresses for the same service account, one of these static IP addresses will need to be assigned to the corresponding wired WAN port on the BBNA.

The “Gateway IP” address, the “Network Mask” and “primary DNS” for the service account will also need to be entered, which should be provided by the ISP. Check the box for Inbound Subnet Aliasing if this is desired. A field for optionally entering an IP address for a secondary DNS server is also provided.

Finally, one or more IP subnets may be specified in the “Additional Subnets” field. The additional subnet(s) should be specified in CIDR notation and be separated by commas if there is more than one. Normally, the “Additional Subnets” field should be left blank, but if one or more additional subnets are specified, the designated WAN interface which is in Static IP mode will be prepared to send and receive traffic to and from the specified subnet.


Some of the older DSL modems use the PPPoE protocol to configure IP addresses. If that is the case, the PPPoE mode should be selected for the corresponding BBNA wired WAN port. In this case, the username and password given by the ISP for the corresponding service account should be entered for the corresponding BBNA wired WAN port.

If there is uncertainty as to what type of IP address configuration schemes are used by the modems, contact your Internet Service Provider(s).

Passthrough Mode

When installing the BBNA in an existing network with a single wired WAN backhaul connection, reconfiguration of the legacy network is not required if the BBNA is configured in “Pass Through” mode, which is available on the WAN ports. This can be useful if the legacy network is relatively complex and the network administrator does not desire to make any configuration changes to the existing network.  For example, the network administrator may wish to retain all of the existing configuration parameters of the firewall device in the legacy network.

In the legacy network, a gateway/modem device providing the WAN backhaul connection is connected directly to a router/firewall device. After installation of the BBNA in Pass Through mode, the BBNA is inserted in-line between the gateway router/modem and the router/firewall device with the gateway/modem connected to one fo the WAN ports and the router/firewall connected to one of the BBNA LAN ports, as indicated in the illustration below. In order to configure the Pass Through mode, the BBNA Management Interface will prompt the user to enter the IP address of the gateway/modem to be connected to that WAN port, the IP address of the firewall, the netmask of the network behind the firewall device, and the IP address of the primary DNS server. An entry for the IP address of a secondary DNS server is optional. 

If an additional subnet is present, enter the subnet address in CIDR notation, e.g. If there are multiple additional subnets, the subnet addresses in CIDR notation can be entered, separated by commas. This is useful in situations where there is a local subnet that is distinct from the subnet specified the given IP address and netmask for the WAN port 1 set-up. Traffic from devices belonging to the specified additional subnet will be aggregated across all available WAN ports. If an additional subnet is not present the corresponding field should be left blank.

Note that in Pass Through mode, WAN port 1 is not assigned an IP address. Also, it is important to note that by configuring WAN port 1 in the Pass Through mode the BBNA will disable its DHCP server.

As a result, when the BBNA is configured in Pass Through mode, it may be necessary to manually assign a static IP address to the PC which is used to access the BBNA Management Interface, if there is no active DHCP server to assign it a dynamic IP address. 

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