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Cisco Bug: CSCsz41259 - Large file transfers to non-RFC2347 compliant tftp servers hang console

Last Modified

Nov 09, 2016

Products (1)

  • Cisco ASA 5500-X Series Firewalls

Known Affected Releases


Description (partial)


Transfers of files larger than 32MB from ASA to a tftp server that is not compliant with RFC2347 
can cause the console to lock up, requiring a power cycle. 


This occurs when the tftp server continually sends acknowledement block 65535 in response to data 
packets from the ASA.
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