Can somebody tell me what should I do to intercept GRE 
encapsulated packet from Cisco?

Now I have only something like this:
18:47:18.797380 212.244.138.1 > 212.244.138.8: gre-proto-0x883E (gre
encap)
18:47:18.797409 212.244.138.8 > 212.244.138.1: icmp: 212.244.138.8
protocol 47 unreachable (DF)
8-(

Or maybe it's only works under Linux/FreeBSD where GRE "device" exists?

--
Dariusz Sznajder
+------------------------------------------------------------------------+
| Kielce University of Technology -             Network Manager          |
|            Poland               -        Mailto:[EMAIL PROTECTED]     |
+------------------------------------------------------------------------+
    *"Unix is like a wigwam - no windows, no gates, Apache inside..."*
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