IP Configuration
IPv4 Management and Interfaces
Cisco 350XG & 550XG Series 10G Stackable Managed Switches
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UDP Relay/IP Helper
Switches do not typically route IP Broadcast packets between IP subnets.
However, this feature enables the device to relay specific UDP Broadcast packets,
received from its IPv4 interfaces, to specific destination IP addresses.
To configure the relaying of UDP packets received from a specific IPv4 interface
with a specific destination UDP port, add a UDP Relay:
STEP 1
Click
IP Configuration
>
IPv4 Management and Interfaces
>
UDP Relay/IP
Helper
.
STEP 2
Click
Add.
STEP 3
Select the
Source IP Interface
to where the device 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 device.
STEP 4
Enter the
UDP Destination Port
number for the packets that the device is to relay.
Select a well-known port from the drop-down list, or click the port radio button to
enter the number manually.
STEP 5
Enter the
Destination 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.
STEP 6
Click
Apply
. The UDP relay settings are written to the Running Configuration file.
DHCPv4 Snooping/Relay
This section covers the following topics:
•
•
•
•
DHCP Snooping Trusted Interfaces
•
