# DHCP Scope Monitor

The DHCP Scope Monitor utility of the OpUtils software helps you to monitor the DHCP Scopes to find the available IP Address count in each of them. When the available IP Address count falls below a certain number, the results are shown in red color.

## Adding DHCP Servers to be Monitored

1. Click the **Toolset** tab.
2. Choose the **DHCP Scope Monitor** available under the Address Monitoring category.
3. Specify the Name or the IP Address of the DHCP Server.
4. Specify the SNMP Read Community of the DHCP Server.
5. Click **Get DHCP Scope Details**.
6. Repeat steps 3 to 5 for adding the scopes of all the DHCP Servers.

All the scopes of the added DHCP Servers along with their current available and used IP Address counts are retrieved and shown in the table below.

## DHCP Scope Monitor Settings

### Schedule Monitoring of Scopes

1. Click the **Settings** link to open the settings page.
2. Select the **Scheduler** tab.
3. Change the Status to **Enabled**.
4. Specify the interval to perform the scan:
   1. **Daily** – To update every day. You need to specify the starting time.
   2. **Weekly** – To update on specific day(s) in a week. You need to specify the starting time and the day(s) on which the update should happen.
   3. **Monthly** – To update on a specific day every month. You need to specify the starting time, select a day, and select a month.
   4. **Once Only** – To run the tool only once at the scheduled time.
5. Click **Schedule** to save the changes.

### Configuring Email Alerts

Alerts are generated when the available address count in a scope falls below the specified value.

1. Click the **Settings** link to open the settings page.
2. Select the **Alert** tab.
3. An email alert is generated when the available IP Addresses in a scope falls below 5. Specify a different value if required.
4. Select the **Enable Email Alert** check box and specify the email addresses as comma-separated values.
5. **Alert Cleanup Policy:** Specify the maximum number of alerts to be stored in the database, the default being 2000. When you delete the older alerts, you have an option to save them as a CSV file for future reference.
6. Click **Save** to save the changes.

### Viewing DHCP Scope Details

The Summary view provides the details of the DHCP Scopes of all the DHCP Servers that are being monitored with the following details:

- **Server IP:** The IP Address of the DHCP Server
- **Scope Name:** The name of the DHCP Scope
- **Used:** The number of used IP Addresses in that scope
- **Available:** The number of available IP Addresses in that scope
- **Size:** The total number of IP Addresses in that scope
- **Last Update Time:** The time at which the data was retrieved from the DHCP Server

To view the details of a specific DHCP Server, select the server from the combo box. To retrieve the current values, select the DHCP Server and click **Refresh**. Select **All** to view or refresh all the DHCP Servers. To delete all the scopes of a DHCP Server, select the server and click **Delete**. To export the scope details, select the DHCP Server and click **Export**, then choose an appropriate format.

## Supported Servers for DHCP Monitoring

- Microsoft DHCP Server 2003
- Microsoft DHCP Server 2008
- Microsoft DHCP Server 2012
- Palo Alto DHCP Server
- Linux DHCP Server