ELTEX MA4000-PX, Руководство по эксплуатации и обслуживанию

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User Manual, Part III 77
Subscriber access/aggregation node МA4000-РХ
24 DHCP RELAY AGENT CONFIGURATION
24.1 Introduction
This Chapter describes configuration of DHCP Relay Agent in the terminal.
DHCP Relay Agent is used to provide a DHCP server with additional information about a received
DHCP request. This may include information about the access node running DHCP Relay Agent as well as
information about
THE
ONT which sent the DHCP request. DHCP packets are modified by interception
and further processing in access node CPU.
The DHCP server identifies the ONT by analyzing DHCP option 82 and DHCPv6 options 37 and 38.
DHCP Relay Agent allows the option to be both transparently transmitted from ONT as well as formed
and rewritten according to a specified format. DHCP option 82 is especially useful for a network which
has no private VLANs dedicated for each user.
DHCP Relay Agent supports configurable formats for both Circuit ID and Remote ID. The
suboptions format is configured with the help of the tokens listed in Table 18. DHCPv6 Relay Agent
supports adjustable format for Interface ID and Remote ID suboptions. The configuration of suboption
format is performed by using tokens represented in Table 19. The placeholders will be replaced with
corresponding values, while the rest of the words will be passed as is.
Table 18
—
DHCP Option 82 Tokens
%HOSTNAME% The access node network name
%SLOTID % The number of MA4000 slot
%MNGIP% The access node IP address
%CHANNELID% ID of the OLT channel the DHCP request arrived from
%ONTID% ID of the ONT which sent the DHCP request
%PONSERIAL% Serial number of the ONT which sent the DHCP request
%GEMID% ID of the GEM port where the DHCP request arrived
%VLAN0% External VID
%VLAN1% Internal VID
%MAC% MAC address of the ONT which sent the request
%OPT60% DHCP option 60 received from the ONT
%OPT82 CID% Circuit ID received from the ONT
%OPT82 RID% Remote ID received from the ONT
%DESCR% ONT description
Table 19 – DHCPv6 option 37 and 38 Tokens
%HOSTNAME% The access node network name
%MNGIP% The access node IP address
%GPON-PORT% The number of PON port from which DHCP request has been received
%ONTID% ONT identifier that sent the DHCP request
%PONSERIAL% Serial number of ONT that sent the DHCP request
%GEMID% The number of GEM port which received the DHCP request
%VLAN0% Extermal VID
%VLAN1% Internal VID
%MAC% MAC address of ONT from which the request has been received