Procedure
1. Install the DHCP server software according to the software vendor’s instructions.
2. Create a DHCP scope to define the range of IP addresses for the phones.
3. Configure the required DHCP options.
The DHCP site-specific option that you configure must match the Site Specific Option
Number (SSON) that the phones use. The default SSON that the phones use is 242.
DHCP options
You can configure the following options in the DHCP server:
Option
Description
Option 1
Specifies the subnet mask of the network.
Option 3
Specifies the gateway IP address list. The list can contain up to 127 total ASCII
characters. Separate more than one IP address with commas with no intervening
spaces.
Option 6
Specifies the DNS server address list. The list can contain up to 127 total ASCII
characters. Separate more than one IP address with commas with no intervening
spaces.
The phone supports DNS and the dotted decimal addresses. The phone attempts to
resolve a non-ASCII-encoded dotted decimal IP address by checking the contents of
DHCP Option 6. At least one address in Option 6 must be a valid, nonzero, dotted
decimal address, otherwise the DNS address fails.
Option 12
Avaya J100 Series IP Phones identify themselves to the DHCP server by sending
the host name in Sub-Option 12 in
DHCP DISCOVER
and
DHCP REQUEST
options.
The host name has the following format:
AVohhhhhh
, where:
•
AV
stands for Avaya.
•
o
is one of the following values based on Object Unique Identifier (OUI) derived
from the first three octets of the phone MAC address:
- A if OUI is 00-04-0D
- B if OUI is 00-1B-4F
- E if OUI is 00-09-6E
- L if OUI is 00-60-1D
- T if the OUI is 00-07-3B
- X if the OUI is anything else
•
hhhhhh
are the ASCII characters for the hexadecimal representation of the last
three octets of the phone MAC address.
Table continues…
Servers, VLAN, and IP configuration
April 2020
Installing and Administering Avaya J100 series IP Phones in an Open SIP
environment
52