Huawei Quidway S3900 Series Operation Manual page 609

Operation Manual - DHCP
Quidway S3900 Series Ethernet Switches-Release 1510
Sub-option
Fail-Over Call
Routing
(sub-option 4)
Note:
For the configurations specifying to add sub-option 2, sub-option 3, and sub-option 4
in the response packets to take effect, you must configure the DHCP server to add
sub-option 1.
III. Mechanism of using option 184 on DHCP server
The DHCP server encapsulates the information for option 184 to carry in the response
packets sent to the DHCP clients. Supposing that the DHCP clients are on the same
segment as the DHCP server, the mechanism of option 184 support on DHCP server
is as follows:
1) A DHCP client sends to the DHCP server a request packet carrying option 55,
which indicates the client requests the configuration parameters of option 184.
2) The DHCP server checks the request list in option 55 carried by the request
packet, and then adds the sub-options of option 184 in the Options field of the
response packet sent to the DHCP client.
Feature
The fail-over call
routing sub-option
carries the IP
address for
fail-over call When
routing and the server
associated dial unreachable, a SIP
number. The IP user can use the
address for configured
fail-over call address
routing and the number of the peer
dial number in to
sub-option 4 of connection
option 184 refer
communicate
to the IP address the peer SIP user.
and dial number
of the session
initiation protocol
(SIP) peer.
Huawei Technologies Proprietary
2-28
Chapter 2 DHCP Server Configuration
Function
the NCP
is
IP
—
and dial
establish a
and
with
Note