Hello,
we have an l2l-ipsec tunnel between an ASA5520 and an ASA5505.
Both devices have configured:
crypto ipsec df-bit clear-df outside
When I copy files over the tunnel to a file server (CIFS),
the windows client sometimes stops with an error message.
When this error occours, one can see on the ASA that
the pre-frag failures counter of the related VPN-tunnel increases.
Under which circumstances can pre-frag errors occur?
How can I fix this?
Thanks in advance, Mark
