Adding an option

Last Updated : Sep 21, 2022 |
Prolog information
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In addition to issuing IP address information, DHCP servers can issue other information in response to specific DHCP option number requests. The settings for each option are attached to the scope.
Most Avaya SIP phones use site specific option number (SSON) 242 to request additional information from a DHCP server. The option should include defining the address of the phone's file server.
  1. Right-click on the DHCP server.
  2. From the pop-up menu, select Predefined options.
  3. Select Add.
  4. Enter the following information:
    • Name: FileOptions
    • Data type: String
    • Code: 242
    • Description: IP Phone settings
  5. Click OK.
  6. In the string value field, enter the following options as a comma separated string.
    HTTPSRVR=xxxx, HTTPPORT=y, HTTPDIR=z
    ADDITIONAL INFORMATION:
    String
    Role
    HTTPSRVR=
    The HTTP file server DNS name or IP address.
    HTTPPORT=
    The destination HTTP port. Only needed is the port differs from the default (80).
    HTTPDIR=
    The HTTP file directory where the IP phone files are located. This entry is not required if those files are in the server's root directory.
    TLSSRVR=
    The HTTPS file server DNS name or IP address.
    TLSPORT=
    The destination HTTP port. Only needed is the port differs from the default (443).
    TLSDIR=
    The HTTPS file directory where the IP phone files are located. This entry is not required if those files are in the server's root directory.
    Additional values can also be used, refer to the appropriate administration manual for the phone type.
  7. Click OK.
  8. Expand the server by clicking on the [+] next to it.
  9. Click on the scope you just created for the phones.
  10. In the right-hand panel, right-click on the scope and select Scope Options.
  11. In the general tab, enter the option number. For example 242.
  12. Verify the String value is correct and click OK.
Next steps
Having created a 242 option and associated with the scope we want used by the IP phones, we now need to activate the scope. See Activating the Scope.
Related links
Alternate DHCP server setup