Avaya JEM24 Installing

Option Description
Option 42 Specifies the SNTP IP address list. List servers in the order of preference. The
minimum length is 4 and the length must be a multiple of 4.
Option 43 Specifies the encapsulated vendor-specific options that clients and servers use to
exchange the vendor-specific information. Option 43 is processed only if the first
code in the Option is 1 with a value of 6889. The value 6889 is an Avaya enterprise
number. All values are interpreted as strings of ASCII characters that are accepted
with or without a null termination character. Any invalid value is ignored and the
corresponding parameter value is not set.
Option 51 Specifies the DHCP lease time. If this option is not received, the DHCPOFFER is not
accepted. Assign a lease time of six weeks or greater. If this option has a value of
FFFFFFFF hex, the IP address lease is assumed to be infinite, so that the renewal
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.
Table continues…
Configuring servers and VLAN
December 2018 Installing and Administering Avaya J100 Series IP Phones 112
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Avaya JEM24 Specifications

General

Brand	Avaya
Model	JEM24
Category	IP Phone
Language	English