Avaya 4600 User Manual
Server Administration
50 4600 Series IP Telephone Release 2.2 LAN Administrator Guide
DHCP Generic Setup
DHCP server setup involves the following phases:
1. Installing the DHCP server software according to vendor instructions.
2. Configuring the DHCP server with the following information:
●
IP Addresses available for the 4600 Series IP Telephones.
●
The following DHCP options:
, item
- Option 3 - Gateway (router) IP Address(es), as described in
, item
. If using
more than one address, the total list can contain up to 255 total ASCII characters. You
must separate IP Addresses with commas with no intervening spaces.
must separate IP Addresses with commas with no intervening spaces.
- Option 6 - DNS server(s) address list. If using more than one address, the total list can
contain up to 127 total ASCII characters. You must separate IP Addresses with
commas with no intervening spaces. At least one address in Option 6 must be a valid,
non zero, dotted decimal address. Otherwise, DNS will fail.
commas with no intervening spaces. At least one address in Option 6 must be a valid,
non zero, dotted decimal address. Otherwise, DNS will fail.
- Option 15 - DNS Domain Name. This string contains the domain name to be used
when DNS names in system parameters are resolved into IP Addresses. This domain
name is appended to the DNS name before the 4600 IP Telephone attempts to
resolve the DNS address. Option 15 is necessary if you want to use a DNS name for
the TFTP server. Otherwise, you can specify a DOMAIN as part of customizing TFTP
as indicated in
name is appended to the DNS name before the 4600 IP Telephone attempts to
resolve the DNS address. Option 15 is necessary if you want to use a DNS name for
the TFTP server. Otherwise, you can specify a DOMAIN as part of customizing TFTP
as indicated in
- Option 51 - DHCP lease time, if desired. We recommend six weeks or greater. Expired
leases cause Avaya IP Telephones to reboot. It is highly desirable to provide enough
leases so an IP telephone’s IP Address does not change if it is briefly taken offline.
leases so an IP telephone’s IP Address does not change if it is briefly taken offline.
Note:
Note:
The DHCP standard states that when a DHCP lease expires, the device should
immediately cease using its assigned IP Address. This is not necessarily the
desired behavior for telephones, especially if a user is on a call. If the network
has problems and the only DHCP server is centralized, the server is not
accessible to the given telephone. In this case the telephone is not usable until
the server can be reached.
immediately cease using its assigned IP Address. This is not necessarily the
desired behavior for telephones, especially if a user is on a call. If the network
has problems and the only DHCP server is centralized, the server is not
accessible to the given telephone. In this case the telephone is not usable until
the server can be reached.
Preferably, once assigned an IP Address, the telephone continues using that
address after the DHCP lease expires, until a conflict with another device is
detected. As
address after the DHCP lease expires, until a conflict with another device is
detected. As
on page 80 indicates, the system parameter DHCPSTD allows an
administrator to specify that the telephone will either: