R3721-F3210-F3171-HP High-End Firewalls Network Management Configuration Guide-6PW101

Table Of Contents
151
{ Sub-option 2: Padded with the MAC address of the DHCP relay agent interface or the MAC
address of the DHCP snooping device that received the client’s request. It has the same format
as that in normal padding format. See Figure 87.
Option 184
Option 184 is a reserved option, and parameters in the option can be defined as needed. The firewall
supports Option 184 carrying voice related parameters, so a DHCP client with voice functions can get an
IP address along with specified voice parameters from the DHCP server.
Option 184 involves the following sub-options:
Sub-option 1—IP address of the primary network calling processor, which serves as the network
calling control source and provides program downloads.
Sub-option 2—IP address of the backup network calling processor that DHCP clients will contact
when the primary one is unreachable.
Sub-option 3Voice VLAN ID and the result whether DHCP clients take this ID as the voice VLAN
or not.
Sub-option 4—Failover route that specifies the destination IP address and the called number that a
Session Initiation Protocol (SIP) user uses to reach another SIP user when both the primary and
backup calling processors are unreachable.
NOTE:
For Option 184, you must define sub-option 1 to make other sub-options take effect.
Protocols and standards
RFC 2131, Dynamic Host Configuration Protocol
RFC 2132, DHCP Options and BOOTP Vendor Extensions
RFC 1542, Clarifications and Extensions for the Bootstrap Protocol
RFC 3046, DHCP Relay Agent Information Option
RFC 3442, The Classless Static Route Option for Dynamic Host Configuration Protocol (DHCP)
version 4