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regular translation creation failed for icmp src inside

Posted on 2009-05-14
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Last Modified: 2012-06-22
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
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Question by:brucehunter
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Voltz-dk earned 250 total points
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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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