07-22-2003 01:59 PM - edited 03-02-2019 09:02 AM
does anyone know how the the tunnel checksum is calculated?...it it md5?
john
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07-22-2003 02:37 PM
If you are referring to GRE, then it uses 1's complement method to calculate the checksum. Zero the checksum field, take the 1's complement sum of the payload + GRE header, then take a 16 bit 1's compliment of the previous result, to get the final checksum.
07-22-2003 02:37 PM
If you are referring to GRE, then it uses 1's complement method to calculate the checksum. Zero the checksum field, take the 1's complement sum of the payload + GRE header, then take a 16 bit 1's compliment of the previous result, to get the final checksum.
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