1-23fail-over ip-address dialer-string: Specifies the failover IP address and dialer string. The dialer-string isa string of 0 to 39 characters, which can be 0 to 9, and “*”.interface interface-type interface-number [ to interface-type interface-number ]: Specifies the DHCPinterface address pool (s).all: Specifies all interface address pools.DescriptionUse the dhcp server voice-config command to enable the DHCP server to assign IP addresses withOption 184 and its sub-options from the specified interface address pool.Use the undo dhcp server voice-config command to disable the DHCP server from assigning IPaddresses with Option 184 and its sub-options from the specified interface address pool.The DHCP server answers Option 184 and the corresponding sub-options only after the DHCP clientrequests for Option 184.Before configuring other sub-options, you must configure the sub-option ncp-ip; otherwise othersub-options do not take effect.By default, a DHCP server interface address pool does not assign Option 184 and the correspondingsub-options to the client.Related commands: voice-config.Examples# Enter system view system-viewSystem View: return to User View with Ctrl+Z.# Enter VLAN-interface 1 view.[Sysname] interface Vlan-interface 1# Enable the DHCP server to support all the sub-options of Option 184 in VLAN-interface 1. The NCPIP address is 1.1.1.1 and the IP address of the alternate server is 2.2.2.2. The voice VLAN is enabled,with the ID being 3. The fail-over IP address is 3.3.3.3 and the dial number string is 99*.[Sysname-Vlan-interface1] dhcp select interface[Sysname-Vlan-interface1] dhcp server voice-config ncp-ip 1.1.1.1[Sysname-Vlan-interface1] dhcp server voice-config as-ip 2.2.2.2[Sysname-Vlan-interface1] dhcp server voice-config voice-vlan 3 enable[Sysname-Vlan-interface1] dhcp server voice-config fail-over 3.3.3.3 99*display dhcp server conflictSyntaxdisplay dhcp server conflict { all | ip ip-address }ViewAny viewParametersall: Specifies all IP addresses.
