Dell S4048T - UDP Helper with no Configured Broadcast Addresses; Troubleshooting UDP Helper

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 57. UDP Helper with Configured Broadcast Addresses
UDP Helper with No 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.
• If the Incoming packet has a destination IP address that matches the subnet broadcast address of any
interface, the unaltered packet is routed to the matching interfaces.
Troubleshooting UDP Helper
To display debugging information for troubleshooting, use the debug ip udp-helper command.
Example of the debug ip udp-helper Command
Dell(conf)# debug ip udp-helper
01:20:22: Pkt rcvd on Te 5/1 with IP DA (0xffffffff) will be sent on Te 5/2 Te 5/3
Vlan 3
01:44:54: Pkt rcvd on Te 7/1 is handed over for DHCP processing.
When using the IP helper and UDP helper on the same interface, use the debug ip dhcp command.
Example Output from the debug ip dhcp Command
Packet 0.0.0.0:68 -> 255.255.255.255:67 TTL 128
IPv4 Routing 516