H3C S3600 Series User Manual

Operation Manual – DHCP
H3C S3600 Series Ethernet Switches-Release 1510 Chapter 2
DHCP Server Configuration
2-23
 Note:
To enable option 82 normally, you need to perform corresponding configuration on both
the DHCP server and the DHCP relay. For the configuration of the DHCP relay, see
section
3.1.3 "Option 82 Supporting”.
2.6 Option 184 Supporting Configuration
2.6.1 Introduction to Option 184
Option 184 is an RFC reserved option, and the information it carries can be customized.
H3C defines four proprietary sub-options for this option, enabling the DHCP server to
put the information required by a DHCP client in the response packet to the client.
I. Basic concept
The four sub-options of option 184 mainly carry information about voice. The following
lists the sub-options and the carried information:
z option: An option in a DHCP message. This option may be a field in variable length.
Option contains some lease information and message types. The option field
contains at least one and up to 255 options.
z Sub-option 1: IP address of the network call processor (NCP-IP).
z Sub-option 2: IP address of the alternate server (AS-IP).
z Sub-option 3: Voice VLAN configuration.
z Sub-option 4: Fail-over call routing.
II. Meanings of the sub-options for option 184
Table 2-23 Meanings of the sub-options for option 184
Sub-option Feature Function Note
NCP-IP
(sub-option 1)
The NCP-IP
sub-option carries
the IP address of
the network call
processor (NCP).
The IP address of
the NCP server
carried by
sub-option 1 of
option 184 is
intended for
identifying the
server serving as
the network call
controller and the
server used for
application
downloading.
When used in option
184, this sub-option
must be the first
sub-option, that is,
sub-option 1

H3C S3600 Series Specifications

General

Brand	H3C
Model	S3600 Series
Category	Switch
Language	English