Dell C9000 series, Reference Manual

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Command History This guide is platform-specific. For command information about other platforms, refer
to the relevant Dell Networking OS Command Line Reference Guide .
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.9(0.0) Introduced on the C9010.
9.2(1.0) Introduced on the Z9500.
9.0.0.0 Added support for IPv6.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.3.7.0 Introduced on the S4810.
8.1.1.0 Introduced on the E-Series ExaScale.
7.9.1.0 Introduced VRF on the E-Series.
7.6.1.0 Introduced on the S-Series.
7.5.1.0 Introduced on the C-Series.
6.2.1.1 Introduced on the E-Series.
Usage Information You can add multiple DHCP servers by entering the
ip helper-address
command
multiple times. If multiple servers are defined, an incoming request is sent
simultaneously to all configured servers and the reply is forwarded to the DHCP client.
The system uses standard DHCP ports, that is UDP ports 67 (server) and 68 (client) for
DHCP relay services. It listens on port 67 and if it receives a broadcast, the software
converts it to unicast, and forwards to it to the DHCP-server with source port=68 and
destination port=67.
The server replies with source port=67, destination port=67 and the system forwards to
the client with source port=67, destination port=68.
ipv6 helper-address
Configures the IPv6 DHCP helper addresses without VRF.
C9000 Series
Syntax
[no] ipv6 helper-address ipv6-address
To delete the ipv6 helper address, use the
[no] ipv6 helper-address ipv6-
address
command.
Dynamic Host Configuration Protocol (DHCP) 815