icmp: udp port route unreachable

[Lawrence Chim <ychim@yallara.cs.rmit.edu.au>]

For time to time, I receive this message from tcpdump.
Does anyone know what does it mean?  Do I configure my route
incorrectly?

20:13:54.250843 xxxxxxxxx.xx.xxxx.xxx.xx > yyyyyy.yy.yyyy.yyy.yy: icmp:
xxxxxxxxx.xx.xxxx.xxx.xx udp port route unreachable (frag 8852:272@0+)
[tos 0xc0]

lawrence,

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