regular translation creation failed for icmp src inside

Hi Experts
Ive been getting these errors on my ASA "regular translation creation failed for icmp src inside"
according to Cisco documentation this error can be caused if a device is sending ICMP packets other than echo or echo-reply the ASA drops such packets and produces this error. But the source ip is always a public ip eg.96.17.166.181 my src inside:172.17.2.10 is my core switch and the destination is allways a public ip. Here is the error.....305006  (source ip) 96.17.166.181  regular translation creation failed for icmp src inside:172.17.2.6 dst outside:96.17.166.181 (type 11, code 0). Any Help is greatly appreciated as allways
brucehunterAsked:
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Voltz-dkConnect With a Mentor Commented:
ICMP type 11 is time-exceeded, which is usually sent in response to trace-route.  So I guess the 96.17.166.181 is doing some traceroute into your network, and eventually your core switch is replying to that.  Then I guess you don't have a translation for that.  

Now you say core switch is .10 though, while log entry is .6 - I don't know which device is what, but still it's likely a traceroute.
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