Option
Description
and rebinding procedures are not necessary even if options 58 and 59 are received.
Expired leases causes the device to reboot.
Option 52
Specifies the overload option. If this option is received in a message, the device
interprets the sname and file parameters.
Option 53
Specifies the DHCP message type. The value can be one of the following:
• 1 for DHCPDISCOVER
• 3 for DHCPREQUEST
For DHCPREQUEST sent to renew the device IP address lease:
• If a DHCPACK is received in response, a log event record is generated with a Log
Category of DHCP.
• If a DHCPNAK is received in response, the device immediately ceases IP address
usage, generates a log event record, sets IPADD to 0.0.0.0, and enters the DHCP
INIT state.
Option 55
Specifies the parameter request list. Acceptable values are:
• 1 for subnet mask
• 3 for router IP addresses
• 6 for domain name server IP addresses
• 7 for log server
• 15 for domain name
• 42 for NTP servers
Option 57
Specifies the maximum DHCP message size.
Set the value to 1500.
Set the value to 1000.
Option 58
Specifies the DHCP lease renew time. If not received or if this value is greater than
that for option 51, the default value of T1, renewal timer is used.
Option 59
Specifies the DHCP lease rebind time. If not received or if this value is greater than
that for Option 51, the default value of T2, rebinding timer is used.
Option 242
Specifies the site-specific option. This option is optional. If you do not configure this
option, ensure that one of the following parameters is configured appropriately
elsewhere:
• HTTPSRVR
• TLSSRVR
DHCP vendor-specific option
You can set DHCP vendor-specific parameters by using DHCP option 43. The supported codes for
Option 43 and the corresponding parameters are as follows:
File Server configuration
September 2017
Installing and Administering Avaya J129 IP Phone
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