Configuring Udp Helper; Overview; Configuration Restrictions And Guidelines; Configuring Udp Helper To Convert Broadcast To Unicast - HPE FlexNetwork HSR6800 Configuration Manual

Configuring UDP helper

Overview

UDP helper can provide the following packet conversion for packets with specific UDP destination
port numbers:
•
Convert broadcast to unicast, and forward the unicast packets to specific destinations.
•
Convert broadcast to multicast, and forward the multicast packets.
•
Convert multicast to broadcast or unicast, and forward the broadcast or unicast packets.

Configuration restrictions and guidelines

When you configure UDP helper, follow these restrictions and guidelines:
•
Do not set UDP ports 67 and 68 for UDP helper, because UDP helper cannot forward DHCP
broadcast packets.
•
You can specify a maximum of 256 UDP ports for UDP helper.
•
You can specify a maximum of 20 unicast and multicast addresses for UDP helper to convert
broadcast packets on an interface.
•
You can map one multicast address to a maximum of 16 broadcast and unicast addresses for
UDP helper to convert multicast packets on an interface.
Configuring UDP helper to convert broadcast to
unicast
You can configure UDP helper to convert broadcast packets with specific UDP port numbers to
unicast packets.
Upon receiving a UDP broadcast packet, UDP helper uses the configured UDP ports to match the
UDP destination port number of the packet.
•
If a match is found, UDP helper duplicates the packet and modifies the destination IP address of
the copy to the configured unicast address. Then UDP helper forwards the unicast packet to the
unicast address.
•
If no match is found, UDP helper does not process the packet.
To configure UDP helper to convert broadcast to unicast:
Step
1. Enter system view.
2. Enable UDP helper.
3. Specify a UDP port
number.
4. Enter interface view.
Command
system-view
udp-helper enable
udp-helper port { port-number | dns |
netbios-ds | netbios-ns | tacacs | tftp |
time }
interface interface-type interface-number
194
Remarks
N/A
By default, UDP helper is
disabled.
By default, no UDP port
numbers are specified.
N/A