Reference Guide

The following is a list of the FTOS version history for this command.
Version 9.0.0.0 Added support for IPv6.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.7.0 Introduced on the S4810.
Version 8.1.1.0 Introduced on the E-Series ExaScale.
Version 7.9.1.0 Introduced VRF on the E-Series.
Version 7.6.1.0 Introduced on the S-Series.
Version 7.5.1.0 Introduced on the C-Series.
pre-Version
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.
FTOS 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 FTOS forwards to the client
with source port=67, destination port=68.
ip helper-address hop-count disable
Disable the hop-count increment for the DHCP relay agent.
S4820T
Syntax
ip helper-address hop-count disable
To re-enable the hop-count increment, use the no ip helper-address hop-count
disable command.
Defaults Enabled; the hops field in the DHCP message header is incremented by default.
Command Modes CONFIGURATION
Command History
This guide is platform-specific. For command information about other platforms, refer to the
relevant FTOS Command Line Reference Guide .
The following is a list of the FTOS version history for this command.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.11.1 Introduced on the Z9000.
666