Reference Guide

IPv4 Routing | 473

Troubleshooting UDP Helper

Display debugging information using the command debug ip udp-helper, as shown in the example below.

FTOS(conf)# debug ip udp-helper

01:20:22: Pkt rcvd on Gi 5/0 with IP DA (0xffffffff) will be sent on Gi 5/1 Gi 5/2 Vlan 3

01:44:54: Pkt rcvd on Gi 7/0 is handed over for DHCP processing.

Use the command debug ip dhcp when using the IP helper and UDP helper on the same interface, as shown

in the following example.

Packet 0.0.0.0:68 -> 255.255.255.255:67 TTL 128

2005-11-05 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

2005-11-05 11:59:35 %RELAY-I-BOOTREQUEST, Forwarded BOOTREQUEST for 00:02:2D:8D:46:DC to

137.138.17.6

2005-11-05 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 =

2005-07-05 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