What are the DHCP options?
DHCP Options are additional IP address settings that a DHCP server passes to DHCP clients. When a DHCP client requests an IP address from a DHCP server, the server sends the client at least an IP address and a subnet mask value. Additional information can be sent to clients if you configure various DHCP options.
How do I set DHCP Option 150?
Follow these instructions to add an Option item for 150:
- In the Set Predefined Options window, click Add.
- Enter the value TFTP Server Address in the name.
- Select IP address in the Data Type field.
- Check the box labeled Array.
- Enter 150 in the field labeled Code.
- Click OK to save.
What is option125?
Option 125 is a vendor-specific DHCP Server feature that is required if you are using AIM’s multi-subnet mode. The option gives the endpoints the IP Address of the Primary and any other Backup or Satellite AIM Servers that reside on the network. It is also used to setup Satellite AIM’s.
How do I set DHCP options?
Configuring DHCP Options
- Navigate to Security & SD-WAN > Configure > DHCP (or, on the MS switch, Switch > Configure > Routing & DHCP > [the interface being edited] > DHCP settings)
- Select Add a DHCP option.
- Select the desired Option from the list or if it isn’t listed, add a custom option.
- Input the DHCP Code.
What is Option 150 in VOIP?
When a Cisco IP Phone starts, if it does not have both the IP address and TFTP server IP address pre-configured, it sends a request with option 150 to the DHCP server to obtain this information. DHCP Option 150 is Cisco proprietary. Like option 150, option 66 is used to specify the Name of the TFTP server.
What is Option 150 used for?
When a Cisco IP Phone starts, if it does not have both the IP address and TFTP server IP address pre configured, it sends a request with option 150 to the DHCP server to obtain this information.
What is Option 150 DHCP?
Option 150 is a DHCP option which tells the IP address of TFTP server to the IP phone, so the IP Phone can download and install its configuration files.
How to add option 157 to DHCP server?
Option 157 is not a default option in the Microsoft DHCP server, so it has to be manually added . Follow the steps below to add this option. 1. Open the DHCP service: Start->Programs->Administrative Tools->DHCP. 2. Right click on the desired server, and choose Set Predefined Options. 3. Click Add to manually add a new option.
How to configure DHCP options for IP phones?
1 Open the DHCP service: Start->Programs->Administrative Tools->DHCP. 2 Right click on the desired server, and choose Set Predefined Options. 3 Click Add to manually add a new option. 4 Enter the desired Name, the Data Type should be set to String and the Code should be set to 157 .
Are there any non configurable options in DHCP?
The following tables list common, configurable DHCP options. Non-configurable options or TLVs have not been included, even though these may be present in a file or on the wire. The following tables also do not include options that are only necessary for the operation of the DHCP protocol.
How to add DHCP option to Windows Server?
Follow the steps below to add this option. 1. Open the DHCP service: Start->Programs->Administrative Tools->DHCP. 2. Right click on the desired server, and choose Set Predefined Options. 3. Click Add to manually add a new option. 4. Enter the desired Name, the Data Type should be set to String and the Code should be set to 157 .