Does anyone know how to exclude a special prefix number when configuring destination-pattern in pots dial-peer? i.e. contain all others dest. except beginning with 36598?

I set a tunnel source from the f0/0, destination to a remote router. When the traffic is more, many packets loss (4%~12%) when ping IP addr. of the another side of this tunnel, but no packets loss whenping the tunnel destination IP addr. For example,...