50 
Configuring Option 184 parameters for DHCP clients 
To assign calling parameters to DHCP clients with voice service, you must configure Option 184 on 
the DHCP server. For more information about Option 184, see "Option 184."
 
To configure option 184 parameters in a DHCP address pool: 
 
Step Command Remarks 
1.  Enter system view. 
system-view 
N/A 
2.  Create a DHCP address pool and 
enter its view. 
dhcp server ip-pool 
pool-name 
By default, no DHCP 
address pool exists. 
3.  Specify the IP address of the 
primary network calling 
processor. 
voice-config ncp-ip
 ip-address 
By default, no primary 
network calling processor is 
specified. 
After you configure this 
command, the other Option 
184 parameters take effect.
4.  (Optional.) Specify the IP address 
for the backup server.  
voice-config as-ip 
ip-address 
By default, no backup 
network calling processor is 
specified. 
5.  (Optional.) Configure the voice 
VLAN. 
voice-config voice-vlan
 vlan-id 
{ 
disable
 | 
enable
 } 
By default, no voice VLAN is 
configured. 
6.  (Optional.) Specify the failover IP 
address and dialer string. 
voice-config fail-over
 ip-address 
dialer-string 
By default, no failover IP 
address or dialer string is 
specified. 
 
Customizing DHCP options 
 
IMPORTANT: 
Use caution when customizing DHCP options because the configuration might affect DHCP 
operation. 
 
You can customize options for the following purposes: 
•  Add newly released options. 
•  Add options for which the vendor defines the contents, for example, Option 43. 
•  Add options for which the CLI does not provide a dedicated configuration command. For 
example, you can use the option 4 ip-address 1.1.1.1 command to define the time server 
address 1.1.1.1 for DHCP clients. 
•  Add all option values if the actual requirement exceeds the limit for a dedicated option 
configuration command. For example, the dns-list command can specify up to eight DNS 
servers. To specify more than eight DNS servers, you must use the option 6 command to 
define all DNS servers. 
To customize a DHCP option in a DHCP address pool: 
 
Step Command Remarks 
1.  Enter system view. 
system-view 
N/A 
2.  Create a DHCP address 
pool and enter its view. 
dhcp server ip-pool 
pool-name 
By default, no DHCP address pool 
exists. 
3.  Customize a DHCP 
option 
code { 
ascii
 ascii-string | 
hex
  By default, no DHCP option is