44
dhcp server ip-pool pool-name
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 of 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
DHCP option customization applications
You can customize DHCP 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.
Common DHCP options
Table 2 lists common DHCP options and their parameters.
Table 2 Common DHCP options
Option Option name
Corresponding
command
Recommended parameter in
the
ption command
3 Router Option
gateway-list
ip-address
6
Domain Name Server
Option
dns-list
ip-address
15 Domain Name
domain-name
ascii
44
NetBIOS over TCP/IP
Name Server Option
nbns-list
ip-address
46
NetBIOS over TCP/IP Node
Type Option
netbios-type
hex
66 TFTP server name
tftp-server
ascii
67 Boot file name
bootfile-name
ascii
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