Avaya 4600 Manuel D’Utilisation

- Option 52 - Overload Option, if desired. If this option is received in a message, the 

telephone interprets the sname and file fields in accordance with RFC 2132, 
Section 9.3.

- Option 58 - DHCP lease renew time, if desired.

- Option 59 - DHCP lease rebind time, if desired.

- Option 66 - TFTP Server Name.

- A 4600 Series IP Telephone-specific DHCP option specifying information such as 

TFTP server and Avaya Media Server Gatekeeper IP Addresses. Use the 
Site-Specific Option Number (SSON) at #176. You can set this option’s value, for 
example, to either of the following strings:

xxx.xxx.xxx.xxx,

yyyy,

<path>,

zzz.zzz.zzz.zzz  

OR 

{list of DNS names}, 

yyyy, 

<path>, 

of DNS names} 

Note:

List the TFTPDIR value before the TFTPSRVR value, if the latter is specified in 
the SSON.

Note:

Some DHCP applications limit the length of Option 176 to 247 characters.

●

Comply with the DHCP standard by setting DHCPSTD to “1”, or 

●

Continue to use its IP Address after the DHCP lease expires by setting 
DHCPSTD to “0”. 

The latter case is the default. If the default is invoked, after the DHCP lease 
expires the telephone sends an ARP Request for its own IP Address every five 
seconds. 
The request continues either forever, or until the phone receives an ARP Reply. 
After receiving an ARP Reply, the telephone displays an error message, sets its 
IP Address to 0.0.0.0, and attempts to contact the DHCP server again.

Note:

Microsoft DHCP servers support only dotted-decimal format for file server 
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.