Authentication Question

["Shahram Davari" <davari at broadcom.com>]

Hi,

For BFD processing, the Base text says:

"If the A bit is set and no authentication is in use (bfd.AuthType is zero), the packet MUST be discarded."

Isn't the bdf.AuthType set based on the A bit? If so then isn't this statement a circular logic? Shouldn't it be changed to:

"If the A bit is set and no authentication is in use (Authentication header is not present), the packet MUST be discarded."


And a general question. Since each packet is Authenticated on its own, can Authentication type change in the middle of a Session? Or can some BFD packets be transmitted with Authentication and some without (off course with proper setting of A flag)?

Thanks,
Shahram