Avaya 4600 Series Administrator's Manual page 56

Server Administration
Note:
Microsoft DHCP servers support only dotted-decimal format for file server
Note:
addresses, not symbolic names. Option 66 need not be used if the TFTP server
is identified in the Site Specific Option Number string (Option 176), or if HTTP is
to be used exclusively instead of TFTP. However, to simplify configuration, we
recommend that you use Option 66 if you are using TFTP. If you use both Option
66 and Option 176 to identify TFTP servers, the value(s) in Option 176 overrides
the value(s) in Option 66.
- A 4600 Series IP Telephone-specific DHCP option specifying information such as:
TFTP server and Avaya Media Server Gatekeeper IP Addresses, or SIP-specific
parameters, such as SIPPROXYSRVR, as defined in
Customizable System
#176. You can set this option's value, for example, to either of the following strings:
MCIPADD=xxx.xxx.xxx.xxx,MCPORT=yyyy,TFTPDIR=<path>,TFTPSRVR=
zzz.zzz.zzz.zzz
OR
MCIPADD={list of DNS names}, MCPORT=yyyy, TFTPDIR=<path>, TFTPSRVR= {list
of DNS names}
Note:
List the TFTPDIR value before the TFTPSRVR value, if the latter is specified in
Note:
the SSON.
Some DHCP applications limit the length of Option 176 to 247 characters.
You can have SIP-specific, H.323-specific, or common system parameters in the
same SSON Option. All such parameters are downloaded to all IP telephones,
but only the relevant parameters for a given telephone are acted upon.
The 4600 Series IP Telephones do not support Regular Expression Matching, and therefore, do
not use wildcards. See
In configurations where the upgrade script and application files are in the default directory, do
not use the TFTPDIR=<path>.
You do not have to use Option 176. If you do not use this option, you must ensure that the key
information, especially TFTPSRVR, MCIPADD, and MCPORT, is administered appropriately
elsewhere. For example, when you specify the DNS server in Option 6, and the Domain Name
in Option 15, you can use the configured names "AvayaTFTPServer" and "AvayaCallServer" for
TFTPSRVR and MCIPADD, respectively. Upgrading from IP telephone Releases prior to R1.60
requires Option 176 to be minimally administered with MCIPADD.
Administer DHCP servers to deliver only the options specified in this document. Administering
additional, unexpected options might have unexpected consequences, including possibly
causing the IP telephone to ignore the DHCP server.
56 4600 Series IP Telephone Release 2.3 LAN Administrator Guide
Parameters. Use the Site-Specific Option Number (SSON) at
Administering Options for the 4600 Series IP Telephones
4600 Series IP Telephone
on page 86.