# DHCP server

## 1. Summary

This page contains the settings for using the DHCP server function, the settings for the IP address range to assign and the term of validity, and so on.

## 2. Top page

This is the top page for DHCP server.

### 2.1. DHCP server operations

- Displays the settings for DHCP operations.

- The table items are explained below.

  - DHCP server functions

    - Displays whether a DHCP server function is to be enabled or not.

  - Interfaces with the DHCP server function enabled

    - Displays VLAN interfaces with the DHCP server function enabled.

- Press the "Setting" button to access a page where you can configure the DHCP server operation settings.

### 2.2. List of addresses assigned by DHCP

- The IP address range assigned for the DHCP is displayed for each DHCP pool.

- The table items are explained below.

  - Check box

    - Select the check box to delete DHCP pool settings.

  - Pool name

    - Displays the DHCP pool name.

  - IP address assignment range

    - The IP address range assignable for the DHCP server using the DHCP server function is displayed.

  - Lease time

    - Shows the term for which IP addresses are assigned.

  - Lease count

    - Displays the total for the number of IP addresses on lease and the number of IP addresses within the assignment range.

- Press the "New" button to display a page where you can create new settings for the DHCP pool.

- Press the "Setting" button to access a page where you can change the settings of the selected DHCP pool.

- If you press the "Delete" button, all DHCP pools whose check box has a check mark will be deleted.

- Up to 64 DHCP pools can be configured.

### 2.3. DHCP class

- Displays a list of configured DHCP classes.

- The table items are explained below.

  - Check box

    - Select the check box to delete DHCP class settings.

  - Class name

    - Displays the DHCP class name.

  - Remote ID

    - Displays the remote ID used for Option 82 matching.

  - Circuit ID

    - Displays the circuit ID used for Option 82 matching.

  - Subscriber ID

    - Displays the subscriber ID used for Option 82 matching.

- Press the "New" button to display a page where you can create new settings for the DHCP class.

- Press the "Setting" button to display a page where you can change the settings of the selected DHCP class.

- If you press the "Delete" button, all DHCP classes whose check boxes are selected will be deleted.

- Up to 16 DHCP classes can be configured.

## 3. DHCP Server Operation Settings Page

This page is for configuring the basic operation settings for the DHCP server.
Enter the settings, and then press the "Confirm" button.
If there are no mistakes in the input content of the confirmation screen, press the "OK" button.

### 3.1. DHCP server operation settings

- DHCP server functions

  - Select the operation for the DHCP server function from the following options.

    - Disable

    - Enable

- Interfaces to enable

  - Select VLAN interface for which the DHCP server function will be enabled.

  - Press the "Select" button to display the "VLAN interface list" dialog box.

  - Select the VLAN interface check box in the "VLAN interface list" dialog box and press the "OK" button, in order to select the VLAN interfaces on which the DHCP server function will be enabled.

  - Up to 32 VLAN interfaces can be selected.

## 4. Address Assignment Settings Page

In this page you can set the IP address range assignable for the DHCP server.
Enter the settings, and then press the "Confirm" button.
If there are no mistakes in the input content of the confirmation screen, press the "OK" button.

### 4.1. Address assignment settings

- Pool name

  - When configuring new settings

    - Specify the DHCP pool name.

    - Characters that can be entered are single-byte alphanumeric characters excluding "? "

    - Up to 31 characters can be inputted.

    - You cannot use the same name already used for another DHCP pool.

  - When changing settings

    - Displays the selected DHCP pool name.

- Network address

  - Specify the target network address.

  - You cannot specify a network address that conflicts with a DHCP pool network already set.

- IP address range

  - Input the IP address range to be assigned.

  - Input the starting IP address. If the ending IP address has not been specified, a single IP address will be specified.

  - Up to 8 IP address ranges can be specified.

  - Up to 8192 IP addresses total from all pools can be assigned.

  - IP addresses that are not included in the specified network cannot be specified.

- Gateway

  - Specify the IP addresses that will be notified as a default gateway.

  - Up to 8 gateways can be specified.

- DNS server

  - Specify the IP address to be notified as a DNS server.

  - Up to 8 DNS servers can be specified.

- Domain name

  - Specify the domain name to be notified.

  - Characters that can be inputted include single-byte alphanumeric characters, dots(.), and hyphens(-).

  - Up to 253 characters can be inputted.

- Lease time

  - Input the term for which the IP address is assigned.

  - The minimum setting value for the lease time is 20 seconds, and the maximum value is 120 days, 23 hours, 59 minutes and 59 seconds.

- DHCP pool class

  - This setting is for Option 82.

  - You can configure IP address assignments settings, etc., based on the remote ID, circuit ID, and subscriber ID set in the specified DHCP class for received packets with Option 82.

  - DHCP class

    - You can select from the predefined DHCP class.

    - If the contents of Option 82 match the respective IDs of the selected DHCP class, IP address assignment, etc. will be processed with the following DHCP pool class settings.

  - IP address range (DHCP pool class)

    - Input the IP address range to be assigned.

    - Input the starting IP address. If the ending IP address has not been specified, a single IP address will be specified.

    - Up to 8 IP address ranges can be specified.

    - Up to 8192 IP addresses total from all pools can be assigned.

    - IP addresses that are not included in the specified network cannot be specified.

  - Gateway (DHCP pool class)

    - Specify the IP addresses that will be notified as a default gateway.

    - Up to 8 gateways can be specified.

  - DNS server (DHCP pool class)

    - Specify the IP address to be notified as a DNS server.

    - Up to 8 DNS servers can be specified.

  - Domain name (DHCP pool class)

    - Specify the domain name to be notified.

    - Characters that can be inputted include single-byte alphanumeric characters, dots(.), and hyphens(-).

    - Up to 253 characters can be inputted.

  - Lease time (DHCP pool class)

    - Input the term for which the IP address is assigned.

    - The minimum setting value for the lease time is 20 seconds, and the maximum value is 120 days, 23 hours, 59 minutes and 59 seconds.

## 5. DHCP Class Settings Page

In this page, you can set the Remote ID, Circuit ID, Subscriber ID, etc., for DHCP server Option 82 matching.
The configured DHCP class is used to set the DHCP pool class on the Address assignment settings page.
Enter the settings, and then press the "Confirm" button. If there are no mistakes in the input content of the confirmation screen, press the "OK" button.

### 5.1. DHCP class settings

- Class name

  - When configuring new settings

    - Specify the DHCP class name.

    - Characters that can be entered are single-byte alphanumeric characters excluding ‘?’, ‘"’, ‘|’, and ‘>’

    - Up to 31 characters can be inputted.

    - You cannot use the same name already used for another DHCP class.

  - When changing settings

    - Displays the selected DHCP class name.

- Remote ID

  - Enter the remote ID to apply to the DHCP class.

  - You can specify up to 128 remote IDs for all DHCP classes combined.

  - You can specify up to 65 bytes in hexadecimal. Separate each byte with a colon (:).

- Circuit ID

  - Enter the circuit ID to apply to the DHCP class.

  - You can specify up to 128 circuit IDs for all DHCP classes combined.

  - You can specify up to 65 bytes in hexadecimal. Separate each byte with a colon (:).

- Subscriber ID

  - Enter the subscriber ID to apply to the DHCP class.

  - You can specify up to 128 subscriber IDs for all DHCP classes combined.

  - Characters that can be entered are single-byte alphanumeric characters excluding ‘?’, ‘|’, and ‘>’

  - Up to 50 characters can be inputted.

- If you press the "Easy input" button, you can automatically enter the remote ID, circuit ID, and subscriber ID in the Yamaha switch Option 82 format.

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