Chapter 3: Device Configuration

Operation under the Network DHCP selection allows users to temporarily wander outside of the network infrastructure without losing connectivity.

The server may be configured by the operator to hand out temporary or static leases. The VMM must associate and acquire an address from the network before establishing communications. Once a lease has been granted, the address will be valid out of network coverage for the remainder of the lease or, if a static lease was granted, until the next power cycle. If the lease expires or the user cycles power while outside of network coverage, the user will again lose the ability to communicate with the wireless network.

Additional Information about the Statically Provisioned Setting

When selecting the Statically Provisioned Bridge Addressing option from the Configuration web page, the VMM device will use provisioned DHCP-like information to establish an IP address for use in the wireless network. A DHCP server is not required on the core network because the addresses are derived from the MAC address by default. It should be noted that a DHCP server can still exist on the network to hand out addresses to other nodes using the Network DHCP option as long as the server's address range does not conflict with addresses assigned to other devices using the Statically Provisioned option.

The IP addresses and options used are also configurable per-device using the MOTOMESH MeshManager application.

The Network Operator can choose to keep the provided (derived IP address) or assign a fixed IP address and subnet mask. It is up to the Network Operator to ensure that the assigned address is routable on the core network (if core network access is needed) and that it does not conflict with other addresses in use. This is analogous to and carries the same caveats as plugging an Ethernet card into a LAN and manually assigning an address to the card.

DHCP Server Section (External Device Provisioning)

Prior to attaching external devices to the VMM device, the resident DHCP server needs to be enabled. The current VMM factory defaults automatically enable the DHCP server feature.

Table 3-4 Device Web Interface - DHCP Server Section (Configuration Tab)

Field Name

Field Description

Field Default

 

 

Value

Enabled

The VMMs resident DHCP server is enabled when this

Check box checked,

 

checkbox is selected. Use this feature when you need to

feature enabled

 

attach several devices to the VMMs Ethernet port via a hub or

 

 

similar device. The recommended limit is 50 attached

 

 

devices.

 

 

 

 

DHCP Range Start

This is the first IP address in a range of IP addresses that the

192.168.0.1

 

local DHCP server will allocate to any new clients connected

 

 

to the VMM (with the enabled DHCP server).

 

6881011Y54-A September 2005

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