Users Guide

Version Description
pre-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.
Dell Networking OS 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 Dell Networking OS
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.
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, see
the relevant Dell Networking OS Command Line Reference Guide.
Version Description
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
9.8(1.0) Introduced on the Z9100–ON.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000-ON.
9.2(1.0) Introduced on the Z9500.
9.0.2.0 Introduced on the S6000.
IPv4 Routing 991