Option Description
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
• 26 for interface MTU
• 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 (SSON). It is optional but cannot be used
simultaneously with Option 43.
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:
Code
Parameter
1 Does not set any parameter. The value must be 6889.
2 HTTPSRVR
3 HTTPDIR
4 HTTPPORT
5 TLSSRVR
6 TLSDIR
7 TLSPORT
8 TLSSRVRID
9 L2Q
Table continues…
Initial setup and connectivity
January 2020 Installing and Administering Avaya 9601/9608/9611G/9621G/9641G/9641GS IP
Deskphones SIP 28
Comments on this document? infodev@avaya.com
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