Configuring DHCP Options for Cisco Devices

Supported VoIP devices can be automatically provisioned using DHCP Options.  This is beneficial in all deployments.

Step-by-step guide

Cisco Routers

Complete the following steps to properly configure your device.

1. Connect into the router using a Serial cable, Telnet, or SSH
2. Enter Privileged EXEC mode
3. Find the DHCP scope you wish to edit by typing the following command
   

   1. show ip dhcp pool

4. Enter Global Configuration mode
5. Enter into DHCP Pool configuration by typing:

   1. ip dhcp pool <name from step 3>

6. Locate the pertaining command(s) to enter from the table below

   Phone Manufacturer	Command to input via CLI	Notes
   Cisco	option 150 ip x.x.x.x y.y.y.y	x.x.x.x and y.y.y.y should be replaced with the provisioning server settings received from Customer Care
   Polycom	option 160 ascii "<URL provided by Customer Care>"	Quotes required around ASCII string

7. Exit Configuration mode

8. Save the Running Configuration by typing the following command

   1. copy running-config startup-config

9. Restart your VoIP device(s)

Cisco Adaptive Security Appliances 

1. Complete the following steps to properly configure your device.
2. Connect into the router using a Serial cable, Telnet, or SSH
3. Enter Privileged EXEC mode
4. Enter Global Configuration mode

5. Locate the pertaining command(s) to enter from the table below

   Phone Manufacturer	Command to input via CLI	Notes
   Cisco	dhcpd option 150 ip <IP address(s) provided by Customer Care>	x.x.x.x and y.y.y.y should be replaced with the provisioning server settings received from Customer Care
   Polycom	dhcpd option 160 ascii "<URL provided by Customer Care>"	Quotes required around ASCII string

6. Exit Configuration mode

7. Save the Running Configuration by typing the following command

   1. copy running-config startup-config

8. Restart your VoIP device(s)

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