Specifications

Chapter 4 - Network Configuration Administration Manual (SIP/MGCP Version)

AT-VP504E FXS 38

5. Reboot the AT-VP504E FXS.

Configuring the

DHCP Server

DHCP servers generally allocate a range of IP addresses for use on a

network and reserve IP addresses for specific devices using a unique

identifier for each device. The AT-VP504E FXS unique identifier is its

media access control (MAC) address. The MAC address appears on

the label located on the bottom side of the unit (some previous versions

may not have the MAC address on the label). It can also be found in

the Provisioning MIB under the

interfaceMacAddress

variable. Allied

Telesyn recommends that you reserve an IP address for each

AT-VP504E FXS on the network.

In addition to the IP address, the DHCP server can set other

configurable options within the AT-VP504E FXS, which expects to

receive its network configuration and Unit Manager information from

the DHCP server. These configuration options are called

vendor

specific codes

Connection to

the DHCP

Behavior

When the AT-VP504E FXS boots, it requests a DHCP offer to get its

IP addresses and network variables. This offer is sent by the DHCP

server with a

lease time

. The lease time is the time the offer from the

DHCP is valid.

When making a request to the DHCP, the AT-VP504E FXS will send

one (1) request every four (4) seconds for a maximum of five (5) retries,

including the first one. As soon as one reply (or more) is received, the

AT-VP504E FXS stops broadcasting. If the offer is valid, the

AT-VP504E FXS takes it and continues its initialization procedure.

Note: Allied Telesyn recommends that you use a Windows 2000- or

Unix-based DHCP server. If you run Windows NT 4.0 and use the built-

in Microsoft DHCP Server, you must use the Site Specific instead of

Vendor Specific.

Note: If the

interfaceUseDhcp

variable is set to 0=False, and any other

xxUseDhcp

variable (see Table 14 on page 36) is set to 1=True, the

AT-VP504E FXS will make its DHCP request with a lease time of 30

seconds that will not be renewed.