Operation Manual - DHCP
Quidway S5600 Series Ethernet Switches-Release 1510 Chapter 2
DHCP Server Configuration
Huawei Technologies Proprietary
2-25
 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
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. Huawei-3Com 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.
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