Polycom 1725-11530-310 사용자 설명서

Administrator’s Guide SoundPoint IP / SoundStation IP 

C - 24

The following figure shows the phone’s processing to determine if the VLAN 

ID is valid:

After the phone boot, it sends a DHCP Discover packet to the DHCP server. 

This is found in the Bootstrap Protocol/option “Vendor Class Identifier” 

section of the packet and includes the phone’s part number and the bootROM 

version. The format of this option's data is not specified in RFC 2132, but is left 

to each vendor to define its own format. To be useful, every vendor's format 

must be distinguishable from every other vendor's format. To make our 

format uniquely identifiable, the format follows RFC 3925, which uses the