1. Edit Makefile
   Notes: on SPARC in 64-bit mode you have to compile with Sun Workshop
   to produce 64-bit module

2. make

3. cp gre /kernel/strmod/gre

4. Create gre interface:

    modload /kernel/strmod/gre
    /sbin/ifconfig ip.gre0 plumb 127.0.0.2 tsrc AAA.BBB.CCC.DDD up

   where AAA.BBB.CCC.DDD your ethernet ip-addr.

   Test, if everything is ok:

   # ifconfig -a
   lo0: flags=1000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4> mtu 8232 index 1
        inet 127.0.0.1 netmask ff000000 
   iprb0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
        inet AAA.BBB.CCC.DDD netmask ffffffe0 broadcast 212.109.32.31
        ether 0:90:27:2f:84:b5 
   ip.gre0: flags=10000c1<UP,RUNNING,NOARP,IPv4> mtu 4096 index 3
        inet tunnel src AAA.BBB.CCC.DDD 
        inet 127.0.0.2 netmask ff000000 

5. Get ip_fil3.4.20 sources, apply patch and istall.

6. Follow wccp config notes.

