Cisco Unified Communications Manager Administration Guide, Release 7.0(1)
DHCP Subnet Configuration
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DHCP Subnet Configuration

Table Of Contents

DHCP Subnet Configuration

Finding a DHCP Subnet

Configuring a DHCP Subnet

DHCP Subnet Configuration Settings

Deleting a DHCP Subnet

Related Topics


DHCP Subnet Configuration


This chapter describes the procedures for adding subnets to DHCP servers.

Use the following procedures to find and add subnets to DHCP servers.

Finding a DHCP Subnet

Configuring a DHCP Subnet

Deleting a DHCP Subnet

DHCP Subnet Configuration Settings

Finding a DHCP Subnet

Use the following procedure to locate DHCP subnets.


Note During your work in a browser session, the cookies on the client machine store your find/list search preferences. If you navigate to other menu items and return to this menu item, or if you close the browser and then reopen a new browser window, the system retains your Cisco Unified Communications Manager search preferences retained until you modify your search.


Procedure


Step 1 Choose System > DHCP > DHCP Subnet.

The Find and List DHCP Subnets window displays.

Step 2 To find all records in the database, ensure the dialog box is empty; go to Step 3.

To filter or search records:

From the first drop-down list box, select a search parameter.

From the second drop-down list box, select a search pattern.

Specify the appropriate search text, if applicable.


Note To add additional search criteria, click the + button. When you add criteria, the system searches for a record that matches all criteria that you specify. To remove criteria, click the - button to remove the last added criteria or click the Clear Filter button to remove all added search criteria.


Step 3 Click Find.

All or matching records display. You can change the number of items that display on each page by choosing a different value from the Rows per Page drop-down list box.


Note You can delete multiple records from the database by checking the check boxes next to the appropriate record and clicking Delete Selected. You can delete all configurable records for this selection by clicking Select All and then clicking Delete Selected.


Step 4 From the list of records that display, click the link for the record that you want to view.


Note To reverse the sort order, click the up or down arrow, if available, in the list header.


The window displays the item that you choose.


Additional Information

See the "Related Topics" section.

Configuring a DHCP Subnet

This section describes how to add, update, or copy a DHCP subnet address to the Cisco Unified Communications Manager database.

Procedure


Step 1 Choose System > DHCP > DHCP Subnet

Step 2 Perform one of the following tasks:

To add a DHCP subnet, click Add New.

To update a subnet, find the subnet by using the procedure in the "Finding a DHCP Subnet" section.

To copy a subnet, find the subnet by using the procedure in the "Finding a DHCP Subnet" section; select the DHCP server that you want by checking the check box next to the server name and click Copy.

The DHCP Subnet Configuration window displays.

Step 3 Enter the appropriate settings as described in Table 13-1.

Step 4 Click the Save icon that displays in the tool bar in the upper, left corner of the window (or click the Save button that displays at the bottom of the window) to save the data and to add the subnet to the database.


Changes to the server configuration do not take effect until you restart Cisco Unified Communications Manager. For information about restarting the Cisco CallManager service, refer to the Cisco Unified Serviceability Administration Guide.

Additional Information

See the "Related Topics" section.

DHCP Subnet Configuration Settings

Table 13-1 describes the server configuration settings. For related procedures, see the "Related Topics" section.

Table 13-1 DHCP Subnet Configuration Settings 

Server Information Field
Description

DHCP Server

Choose the DHCP server name from the drop-down list box.

Subnet IP Address

Enter the Subnet IP address.

Primary Start IP Address

Enter the start IP address of the first range of IP addresses to be assigned.

Primary End IP Address

Enter the end IP address of the first range of IP addresses to be assigned.

Secondary Start IP Address

Enter the start IP address of the second range of IP addresses to be assigned.

Secondary End IP Address

Enter the end IP address of the second range of IP addresses to be assigned.

Primary Router IP Address

Enter the IP address of the primary router on your subnet.

Secondary Router IP Address

Enter the IP address of the secondary router on your subnet.

Subnet Mask

Enter the subnet mask.

Domain Name

This field specifies the name that you should use when resolving hostname via the Domain Name System.

Primary DNS IP Address

This field specifies primary DNS IP server name.

Secondary DNS IP Address

This field specifies secondary DNS IP server name.

TFTP Server Name (Option 66)

Use this field to identify a TFTP server. You can configure only one DNS name or a dotted decimal IP address in this parameter.

Primary TFTP Server IP Address (Option 150)

This field specifies the IP addresses for primary Trivial File Transfer Protocol (TFTP) server.

Secondary TFTP Server IP Address (Option 150)

This field specifies the IP addresses for secondary TFTP server.

Bootstrap Server IP Address

This field specifies the address of the server that is used in the next step of the bootstrap process. You can use this as the IP address of the TFTP server or as the default value to DHCP server address if the server is to supply the next bootstrap service.

ARP Cache Timeout (sec)

This field specifies the timeout in seconds for ARP cache entries. Specify the time as a 32-bit unsigned integer.

IP Address Lease Time (sec)

The DHCP server uses the information in this field to specify the lease time that it is willing to offer. Specify the time in units of seconds and as a 32-bit unsigned integer.

Renewal (T1) Time (sec)

This field specifies the time interval from address assignment until the client transitions to the RENEWING state.

Rebinding (T2) Time (sec)

This field specifies the time interval from address assignment until the client transitions to the REBINDING state. Specify the value in units of seconds and as a 32-bit unsigned integer.


Deleting a DHCP Subnet

This section describes how to delete a DHCP server from the Cisco Unified Communications Manager database.

Procedure


Step 1 Find the DHCP subnet by using the procedure in the "Finding a DHCP Subnet" section.

Step 2 From list of matching records, choose the DHCP subnet that you want to delete.

Step 3 Click the Delete Selected icon that displays in the tool bar in the upper, left corner of the window (or click the Delete Selected button that displays at the bottom of the window) to delete the subnet.

If the subnet is not in use, Cisco Unified Communications Manager deletes it. If it is in use, a message displays.


Note You can delete multiple DHCP servers from the Find and List Servers window by checking the check boxes next to the appropriate servers and clicking Delete Selected. You can delete all servers in the window by clicking Select All and then clicking Delete Selected.



Additional Information

See the "Related Topics" section.

Related Topics

Finding a DHCP Subnet

Configuring a DHCP Subnet

Deleting a DHCP Subnet

DHCP Subnet Configuration Settings

DHCP Server Configuration, page 12-1

Dynamic Host Configuration Protocol, Cisco Unified Communications Manager System Guide