Disable or enlarge IPSEC Replay Window

Hi all,

is there any way of disabling IPSEC Replay detection or enlarging the window?
We have a remote location with a 1g wavelength in between and a PING-Time of 18ms and the small window (128) seams to limit the bandwidth to about 100Mbit.
The RB1100 we use normaly can produce about 800Mbit Ipsec Traffic. (Using EOIP over IPSEC)

Regards,

Nikolai