Dell EMC Networking OS Configuration Guide for the S5048F–ON System 9.14.2.4

Example of the debug ip udp-helper Command

DellEMC(conf)# debug ip udp-helper
01:20:22: Pkt rcvd on Tf 5/1 with IP DA (0xffffffff) will be sent on Tf 5/2 Tf 5/3 Vlan 3
01:44:54: Pkt rcvd on Tf 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

2017-08-05 11:59:35 %RELAY-I-PACKET, BOOTP REQUEST (Unicast) received at interface
172.21.50.193 BOOTP Request, XID = 0x9265f901, secs = 0 hwaddr = 00:02:2D:8D:46:DC,
giaddr = 0.0.0.0, hops = 2

2017-08-05 11:59:35 %RELAY-I-BOOTREQUEST, Forwarded BOOTREQUEST for 00:02:2D:8D:46:DC
to 137.138.17.6

2017-08-05 11:59:36 %RELAY-I-PACKET, BOOTP REPLY (Unicast) received at interface
194.12.129.98 BOOTP Reply, XID = 0x9265f901, secs = 0 hwaddr = 00:02:2D:8D:46:DC,
giaddr = 172.21.50.193, hops = 2

2017-08-05 11:59:36 %RELAY-I-BOOTREPLY, Forwarded BOOTREPLY for 00:02:2D:8D:46:DC to
128.141.128.90 Packet 0.0.0.0:68 -> 255.255.255.255:67 TTL 128