User Manual
9. Dhcp-relay service configuration
86
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9.
DHCP-RELAY SERVICE CONFIGURATION
9.1.
DHCPv4-Option60 / 82
The OLT DHCP v4 function does not do anything for the option60. After enabling the DHCP v4 relay
function, the DHCP message is transparently forwarded.
After
enabling
DHCP
(Dynamic
Host
Configuration
Protocol)
Option
82
function,
DHCP
v4
L2 Relay
work process is as
follows:
DHCP V4 client broadcast the request message when initializing.
DHCP
v4
relay
equipment
will
check
whether
there
is
option
82
in
the
message,
and
handle
accordingly. If Option 82 is there, the equipment will handle the message according to the
configuration of the strategy (Discard, Replace the option 82 with relay equipment itself or keep the
one in the original message), then forward the request message to DHCP v4 server. If
there
is
no
Option
82
in
the
request
message,
the
DHCP
v4
relay
equipment
will
forward
the message
to
DHCP
V4
server
after
the
Option
82
is
added.
So
the
request
message
will
contain the
ONU
information
that
is
connected
by
the
DHCP
v4
client,
the
VLAN
that
belongs
to,
and the MAC address of the DHCP v4
relay equipment
itself.
When the DHCP v4 server receives DHCP v4 request message forwarded by DHCP V4 relay equipent,
the message in Option 82 will be recorded, and send the message that is carried with DHCP V4
configuration and option82 information to DHCPv4 relay equipment.
After DHCPv4 relay equipment received the return message of the DHCPv4 server, it will strip Option
82 information in the message, and then forward the message with DHCPv4 configuration
information to the DHCPv4 client.
Configuration:
Enable OLT global DHCPv4 Relay Function:
OLT (config) # dhcp-relay information
Option82 configuration option to add location information field Configure the location information
adding field in the option82:
OLT (config) # dhcp-relay information access-node-id string xxxx
Configure
ONU
CID
(circuit-id,
which
is
used
to
describe
line
information
for
GPON
and
ONU
connections) and RID (remote-id, used to describe remote DHCP server information)in option82.
OLT (config) # interface gpon-onu1 / 1: 1
OLT (config-gpon-onu1 / 1: 1) # dhcp-relay infomation circuit-id
string 123456789
OLT (config-gpon-onu1 / 1: 1) # dhcp-relay infomation remote-id
string 123456789
Содержание QSW-9010
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