Udp Helper With Configured Broadcast Addresses; Udp Helper With No Configured Broadcast Addresses - Dell S6000–ON Configuration Manual

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Figure 48. UDP Helper with Subnet Broadcast Addresses

UDP Helper with Configured Broadcast Addresses

Incoming packets with a destination IP address matching the configured broadcast address of any

interface are forwarded to the matching interfaces.

In the following illustration, Packet 1 has a destination IP address that matches the configured broadcast

address of VLAN 100 and 101. If you enabled UDP helper and the UDP port number matches, the packet

is flooded on both VLANs with an unchanged destination address.

Packet 2 is sent from a host on VLAN 101. It has broadcast MAC address and a destination IP address that

matches the configured broadcast address on VLAN 101. In this case, Packet 2 is flooded on VLAN 101

with the destination address unchanged because the forwarding process is Layer 2. If you enabled UDP

helper, the packet is flooded on VLAN 100 as well.

Figure 49. UDP Helper with Configured Broadcast Addresses

The following describes UDP helper with no broadcast addresses configured.

If the incoming packet has a broadcast destination IP address, the unaltered packet is routed to all

Layer 3 interfaces.

IPv4 Routing