Alcatel-Lucent 060321-10, Rev. B, Cli Reference Manual

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ip udp relay service DHCP Relay Commands
page 15-22 OmniSwitch CLI Reference Guide March 2011
ip udp relay service
Enables or disables UDP port relay for generic UDP service ports ( NBNS, NBDD, or other well-known
UDP ports).
ip udp relay service {TFTP | TACACS | NTP | NBNS | NBDD | DNS} [description description]
ip udp relay no service {TFTP | TACACS | NTP | NBNS | NBDD | DNS}
Syntax Definitions
TFTP TFTP well-known port 69.
TACACS TACACS well-known port 65.
NTP NTP well-known port 123.
NBNS NBNS well-known ports 137.
NBDD NBDD well-known port 138.
DNS DNS well-known port 53.
description A description of the UDP service.
Defaults
N/A
Platforms Supported
OmniSwitch 10K
Usage Guidelines
•
Use the no form of this command to disable UDP Relay for the specified service port.
•
The description parameter is only used with any of the service keywords and provides a user-defined
description to identify the port service.
•
When UDP Relay is disabled for BOOTP/DHCP, the ip helper configuration is not retained and all
dependant functionality (automatic IP configuration for VLAN 1, Telnet and HTTP client
authentication, and so on) is disrupted.
•
Up to three types of UDP Relay services are supported at any one time and in any combination.
•
If port relay is enabled for the NBDD well-known port, NBNS is not automatically enabled by default.
•
Note that when UDP port relay is enabled for NTP, relay cannot forward NTP packets that contain a
destination IP address that matches a VLAN router IP address on the switch.
Examples
-> ip udp relay service DNS
-> ip udp relay service DNS description DNS_1
-> ip udp relay no service DNS