Command Reference Guide

3Com Router 3000 Ethernet Family
Command Reference Guide Chapter 9 DHCP Configuration Commands
3Com Corporation
9-27
Parameter
ncp-ip ip-address: Specifies the IP address of the network call processor (NCP).
as-ip ip-address: Specifies the IP address of the alternate NCP server.
voice-vlan: Voice VLAN.
vlan-id: Voice VLAN ID, in the range 1 to 4094.
enable: Voice VLAN is in the enabled state.
disable: Voice VLAN is in the disabled state.
fail-over: Failover call routing.
ip-address: IP address for failover call routing.
dialer-string: Dial string for failover call routing, comprising digits in the range 0 to 9 and
wildcard asterisk (*).
Description
Use the dhcp server voice-config command to enable the DHCP server to send
option 184 and suboptions of 184 when it assigns addresses from the current interface
address pool.
Use the undo dhcp server voice-config command to disable the DHCP server to
send option 184 and suboptions of 184 when it assigns addresses from the current
interface address pool.
The DHCP server sends option 184 and suboptions of 184 only when thus required by
the DHCP client.
Configure the NCP-IP suboption before configuring other suboptions; otherwise, they
cannot take effect.
By default, the DHCP server does not support option 184 and its suboptions.
Related command: voice-config.
Example
# Enable the DHCP server to support option 184 and its suboptions, setting IP address
of NCP to 1.1.1.1, IP address of the alternate NCP server to 2.2.2.2, state of voice
VLAN to enable, ID of voice VLAN to 1, IP address for failover call routing to 3.3.3.3,
and dial string for failover call routing to 99*.
<3Com> system-view
[3Com] interface Ethernet 0/0/1
[3Com-Ethernet0/0/1] dhcp select interface
[3Com-Ethernet0/0/1] dhcp server voice-config ncp-ip 1.1.1.1
[3Com-Ethernet0/0/1] dhcp server voice-config as-ip 2.2.2.2
[3Com-Ethernet0/0/1] dhcp server voice-config voice-vlan 1 enable
[3Com-Ethernet0/0/1]dhcp server voice-config fail-over 3.3.3.3 99*