View and confirm the configuration setting on the IP forwarding list.
show ip forward-protocol udp portfwdlist
show ip forward-protocol udp portfwdlist <1-1000>
show ip forward-protocol udp portfwdlist <1-1000> [vrf WORD<1-16>] [vrfids <0-512>]
show ip forward-protocol udp portfwdlist vrf WORD<1-16>
show ip forward-protocol udp portfwdlist vrfids WORD<0-512>
None
User EXEC