Subnet Masking For Udp Forwarding Addresses; Configuring And Enabling Udp Broadcast Forwarding; Globally Enabling Udp Broadcast Forwarding; Configuring Udp Broadcast Forwarding On Individual Vlans - HP 2920 Series Multicast And Routing Manual

Table 9 Example of a UDP packet-forwarding environment (continued)
Interface IP address
VLAN 3 15.75.12.1
NOTE: If an IP server or subnet entry is invalid, a switch will not try to forward UDP packets to
the configured device or subnet address.

Subnet masking for UDP forwarding addresses

The subnet mask for a UDP forwarding address is the same as the mask applied to the subnet on
which the inbound UDP broadcast packet is received. To forward inbound UDP broadcast packets
as limited broadcasts to other subnets, use the broadcast address that covers the subnet you want
to reach. For example, if VLAN 1 has an IP address of 15.75.10.1/24 (15.75.10.1
255.255.255.0), you can configure the following unicast and limited broadcast addresses for
UDP packet forwarding to subnet 15.75.1 1.0:
Forwarding destination type
UDP unicast to a single device in the 15.75.1 1.0 subnet
UDP broadcast to subnet 15.75.1 1.0

Configuring and enabling UDP broadcast forwarding

To configure and enable UDP broadcast forwarding on the switch:
1. Enable routing.
2. Globally enable UDP broadcast forwarding.
3. On a per-VLAN basis, configure a forwarding address and UDP port type for each type of
incoming UDP broadcast you want routed to other VLANs.

Globally enabling UDP broadcast forwarding

Syntax:
[no] ip udp-bcast-forward
Enables or disables UDP broadcast forwarding on the routing switch. Routing must
be enabled before executing this command.
Using the no form of this command disables any ip forward protocol udp
commands configured in VLANs on the switch.
Default: Disabled

Configuring UDP broadcast forwarding on individual VLANs

This command routes an inbound UDP broadcast packet received from a client on the VLAN to the
unicast or broadcast address configured for the UDP port type.
Syntax:
[no] ip forward-protocol udp <ip-address>
port-name>
Subnet mask Forwarding
address
255.255.255.0 None
UDP Notes
port
unicast forwarding address configured in VLAN 1
must be on this VLAN.
Also the destination VLAN for UDP 1812 from
clients on VLAN 1.
N/A Destination VLAN for UDP 1813 broadcasts from
clients on VLAN 1.
<port-number |
IP address
15.75.1 1.X
15.75.1 1.255
UDP broadcast forwarding 77