Polycom CX5500 Administrator's Guide

Polycom CX5500 Unified Conference Station Administrator’s Guide 1.1.0
Polycom, Inc. 35
DHCP Menu
The DHCP menu is accessible only when the DHCP client is enabled. You can update DHCP
configuration parameters shown in the table DHCP Menu.
DHCP Menu
Name
Possible Values
Boot Server
0=Option 66, 1=Custom, 2=Static, 3=Custom+Option 66
Option 66 The phone will look for option number 66 (string type) in the response received from the DHCP
server. The DHCP server should send address information in option 66 that matches one of the formats
described for Server Address in Provisioning Server Menu.
Custom The phone will look for the option number specified by the Boot Server Option parameter (below), and
the type specified by the Boot Server Option Type parameter (below) in the response received from the DHCP
server.
Static The phone will use the boot server configured through the Server Menu. For more information, see
Provisioning Server Menu.
Custom + Option 66 The phone will use the custom option first or use Option 66 if the custom option is not
present.
Note: If the DHCP server sends nothing, the following scenarios are possible:
 If a boot server value is stored in flash memory and the value is not 0.0.0.0, then the value stored in
flash is used.
 Otherwise the phone sends out a DHCP INFORM query.
 If a single DHCP INFORM server responds, this is functionally equivalent to the scenario where the
primary DHCP server responds with a valid boot server value.
 If no DHCP INFORM server responds, the INFORM query process will retry and eventually time out.
 If the server address is not discovered using DHCP INFORM then the phone will contact the ZTP server if
the ZTP feature is enabled.
Boot Server Option
128 through 254 (Cannot be the same as VLAN ID Option)
When the Boot Server parameter is set to Custom, this parameter specifies the DHCP option number in which
the phone will look for its boot server.
Boot Server Option Type
0=IP Address, 1=String
When the Boot Server parameter is set to Custom, this parameter specifies the type of DHCP option in which the
phone will look for its provisioning server. The IP Address provided must specify the format of the provisioning
server. The String provided must match one of the formats described for Server Address in Provisioning Server
Menu.
Option 60 Format
0=RFC 3925 Binary, 1=ASCII String
RFC 3925 Binary: Vendor-identifying information in the format defined in RFC 3925.
ASCII String: Vendor-identifying information in ASCII.
For more information, see Technical Bulletin 54041: Using DHCP Vendor Identifying Options With Polycom
Phones.
Note: DHCP option 125 containing the RFC 3295 formatted data will be sent whenever option 60 is sent. DHCP
option 43 data is ignored.

Polycom CX5500 Specifications

General

Brand	Polycom
Model	CX5500
Category	Conference System
Language	English