Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Community Member

SSH - [ACK] TCP CHECKSUM INCORRECT

25 24.547558 src_ip dst_ip TCP 12898 > ssh [ACK] Seq=1013 Ack=868 Win=63645 [TCP CHECKSUM INCORRECT] Len=0

Using a network analyzer to see what's going on in my network and ran across this when I ssh'd into a switch. Any idea why I would be getting this?

I am even getting it on some http traffic

73 43.997420 src_ip dst_ip TCP 12899 > http [ACK] Seq=4146 Ack=10221 Win=64512 [TCP CHECKSUM INCORRECT] Len=0

Thanks!

1 REPLY
Silver

Re: SSH - [ACK] TCP CHECKSUM INCORRECT

May be the third party device rejects your TCP syn or disable the CEF on particular interface.

915
Views
0
Helpful
1
Replies
CreatePlease to create content