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Not supported by SBC SWe Lite in this release.

For the

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 to function as a DHCP server, it must be enabled and have a DHCP pool configured on the at least one of its interfaces. The
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 only performs DHCP server functionality on those interfaces that have a DHCP pool associated with them.

The

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 DHCP Server supports serving up to a maximum of 20 address pools. A DHCP pool typically consists of a name, an IP address range, netmask, default router, and other various network parameters, allowing the
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 to serve as a DHCP server to multiple connected subnets. It also allows the
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 to provide different DHCP parameters to different pools of clients (e.g. SIP phones, engineering workstations, VPN users, etc.).

To create or to modify an existing DHCP Pool:

  1. In the WebUI, click the Settings tab.

  2. From the left navigation pane, go to Protocols > IP > DHCP > Pools.

DHCP Pools

 

Modifying a DHCP Pool

  1. Click the expand () Icon next to the entry you wish to modify.
  2. Edit the entry properties as required, see details below.

Enabling an Entry in a DHCP Pool

  1. Select the check box next to the entry you wish to enable.
  2. Click the Enable () icon at the top of the table. 

Disabling an Entry in a DHCP Pool

 

  1. Select the check box next to the entry you wish to disable.
  2. Click the Disable () icon at the top of the table. 

Creating a DHCP Pool

From the DHCP Pools window, click on the ( ) at the top of the screen.

Create DHCP Pool Entry

 

Pool Attributes - Field Definitions

Pool Name

Specifies the name of the DHCP pool.

Pool Interface

Specifies the interface with which this pool is associated. This drop down list is populated with the interfaces configured in Logical Interfaces. 

Pool IP Start

Specifies the beginning address for the range of addresses in the DHCP pool (the pool from which the DHCP clients will get their IP addresses).

Pool IP End

Specifies the ending address for the range of addresses in the DHCP pool (the pool from which the DHCP clients will get their IP addresses).

Lease Lifetime

Specifies whether the duration of the lease is infinite or a specified value. Valid values: Set (lease is set to a specific value, see Lease Lifetime Value)  or Never Expires (there is no expiration time on lease).

Lease Lifetime Value

Specifies the duration of the lease, in minutes. Valid entry: 2 - 525600 minutes. Visible only when Set is selected from the Lease Lifetime drop down list.

Options - Field Definitions

Default Router

Specifies the default router used for DHCP Clients. Must be an IPv4 address.

DNS Server

Specifies the DNS server used for DHCP Clients. Must be an IPv4 address.

Domain Name

Specifies the domain name for DHCP clients to use when connecting to the pool.

SIP Server Present

Specifies whether or not the node uses a SIP server attached to an available network.

Primary SIP Server

Specifies the Primary SIP server to be used by the DHCP client. Must be an IPv4 address. Visible only when Yes is selected in the SIP Server Present list box.

Secondary SIP Server Present

Specifies whether or not the node uses a SIP server attached to an available network. Visible only when Yes is selected in the SIP Server Present list box.

Secondary SIP Server

Specifies the Secondary SIP server to be used by the DHCP client. Must be an IPv4 address. Visible only when Yes is selected in the Secondary SIP Server Present list box.

NTP Server Present

Specifies whether or not the node uses an NTP server attached to an available network.

Primary NTP Server

Specifies the Primary NTP server to be used by the DHCP client. Must be an IPv4 address. Visible only when Yes is selected in the NTP Server Present list box.

Secondary NTP Server Present

Specifies whether or not the node uses a Secondary NTP server attached to an available network. Visible only when Yes is selected in the NTP Server Present list box.

Secondary NTP Server

Specifies the Secondary NTP server to be used by the DHCP client. Must be an IPv4 address. Visible only when Yes is selected in the Secondary NTP Server Present list box.

TFTP Server

Specifies the TFTP server to be used by the DHCP client. May be any server name or IP address

Bootfile

Specifies the bootfile used by the DHCP client.

Vendor Options - Overview

Vendor Options allows the

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 to provide vendor parameters for different pools of clients (i.e, SIP phones, engineering workstations, VPN users, etc.). The configuration values are specific to the phone or device being configured. For valid values, consult the manual that accompanied the phone/device.

The Vendor Specific Information is for Dynamic Host Configuration Protocol (DHCP) option 43 (defined here: http://tools.ietf.org/html/rfc2132#section-8.4). These options indicate the vendor type, and the DHCP client pool and server to exchange vendor specific information.

The Vendor-Identifying Vendor Options are DHCP option 124/125 (defined here: http://tools.ietf.org/html/rfc3925).

Pool Attribute Configuration - Example

Below is an example configuration for a Polycom (CX500) phone. Follow the initial instructions for Creating and Modifying DHCP Pools and configure as shown below.

These fields must be configured before the Vendor specific configuration below.

Pool Attribute Configuration

 

Vendor Specific Configuration

Vendor Specific Information

Vendor Specific Information - Field Definitions

Vendor Name

Specifies the vendor name for the Vendor Specific Information. Used to match against the client's vendor name and send the vendor attribute if a match occurs. Maximum length: 64 characters.

Code

Specifies the Vendor Specific Information option code sent. Valid entry: 0 - 254 characters.

Value

Specifies the Vendor Specific Information user data sent to the matching DHCP client. This is dependent upon the option code used, and can be an ASCII string or hex string of the 00:aa:bb format. Valid entry: maximum length of 64 characters.

Vendor-Identifying Vendor Options - Field Definitions

Enterprise Number

Specifies the vendor enterprise number for the Vendor-Identifying Vendor Options. Used to match against the client's vendor enterprise number and send a vendor attribute if a match occurs.

Enterprise numbers are defined by IANA and can be found here.

Code

Specifies the Vendor-Identifying Vendor Option code to be sent.

Data

Specifies the Vendor-Identifying Vendor Option data to be sent. A valid entry can be either an ascii string of the attribute or a hex string in the aa:bb:cc format. Maximum length: 64 characters.

 

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