Users Guide
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 eld in the DHCP message header is incremented by default.
Command Modes CONFIGURATION
Command History
This guide is platform-specic. For command information about other platforms, see the relevant Dell Networking
OS Command Line Reference Guide.
Version Description
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.
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.
7.6.1.0 Introduced on the S-Series.
7.5.1.0 Introduced on the C-Series.
6.3.1.0 Introduced for the E-Series.
Usage Information This command disables the incrementing of the hops eld when boot requests are relayed to a DHCP server
through Dell Networking OS. If the incoming boot request already has a non-zero hops eld, the message is relayed
with the same value for hops. However, the message is discarded if the hops eld exceeds 16, to comply with the
relay agent behavior specied in RFC 1542.
Related Commands
• ip helper-address — specify the destination broadcast or host address for DHCP server requests.
• show running-cong — display the current conguration and changes from the default values.
712 IPv4 Routing