DHCP Relay Commands
OmniSwitch 6250 CLI Reference Guide November 2009 page 32-43
ip udp relay
Enables or disables UDP port relay for BOOTP/DHCP and generic UDP service ports (i.e., NBNS/NBDD,
other well-known UDP ports, and user-defined service ports that are not well-known).
ip udp relay {BOOTP | NBDD | NBNSNBDD | DNS | TACACS | TFTP | NTP | port [name]}
no ip udp relay {BOOTP | NBDD | NBNSNBDD | DNS | TACACS | TFTP | NTP | port}
Syntax Definitions
BOOTP BOOTP/DHCP well-known ports 67/68.
NBDD NBDD well-known port 138.
NBNSNBDD NBNS/NBDD well-known ports 137/138.
DNS DNS well-known port 53.
TACACS TACACS well-known port 65.
TFTP TFTP well-known port 69.
NTP NTP well-known port 123.
port Any number that is not a well-known port number.
name Text string description up to 30 characters.
Defaults
By default, relay is enabled on the BOOTP/DHCP well-known ports.
Platforms Supported
OmniSwitch 6250
Usage Guidelines
• Use the no form of this command to disable UDP Relay for the specified service port.
• Only use the port parameter to specify service port numbers that are not well known. For example, do
not specify port 53 as it is the well-known port number for DNS. Instead, use the DNS parameter to
enable relay for port 53.
• The name parameter is only used with the port parameter and provides a user-defined description to
identify the not well-known port service.
• When entering a name for a user-defined service, quotes are required around ambiguous characters,
such as hex characters, spaces, etc, so they are interpreted as text. For example, the name “A UDP
Protocol” requires quotes because of the spaces between the words.
parameter default
name User Service Other#
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