Dell PowerConnect 55xx Systems User Guide 253
FILE LOCATION: C:\Users\gina\Desktop\Checkout_new\Maintenance Projects\Dell
Contax\CxUGSystemConfig.fm
DELL CONFIDENTIAL – PRELIMINARY 9/11/12 - FOR PROOF ONLY
The UDP relays are displayed.
2
To add a UDP relay, click
Add
, and enter the fields:
–
Source IP Address
— Select the source IP address to where the switch
is to relay UDP Broadcast packets, based on a configured UDP
destination port. The interface must be one of the IPv4 interfaces
configured on the switch. Select
All
for all addresses.
–
UDP Port (1 - 65535)
— Check
Default Services
to select all of the
following default ports:
• IEN-116 Name Service (port 42)
•DNS (port 53)
• NetBIOS Name Server (port 137)
• NetBIOS Datagram Server (port 138)
• TACACS Server (port 49)
• Time Service (port 37)
If
Default Services
are not selected, check the text box and enter a
UDP port.
–
Destination IP Address
— Enter the IP address that receives the UDP
packet relays. If this field is 0.0.0.0, UDP packets are discarded. If this
field is 255.255.255.255, UDP packets are flooded to all IP interfaces.
Configuring UDP Relay Using the CLI Commands
The following table summarizes the CLI commands for setting fields
displayed in the UDP Relay pages.
Table 9-37. UDP Relay CLI Commands
CLI Command Description
ip helper-address {ip-
interface|all} address [udp-
port-list]
no ip helper-address {ip-
interface|all} address
Enables the forwarding of User
Datagram Protocol (UDP) broadcast
packets received on an interface to a
specific (helper) address.
Use the no form of this command to
disable the forwarding of broadcast
packets to a specific (helper) address.
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