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1811W WAN Interface/VSAT Modem


I had a "funny" but serious experience today at a client's office. I had  configured an 1811 wireless router, only to go and install. But there, I  could NOT ping the Ethernet interface of the VSAT Modem.

The IP addresses were correctly configured and both interfaces were in  the same subnet. I even configured the same speed (auto/full duplex) on  both interfaces, used both straight through and cross-over cables, all  to no avail.

Please can somebody help me? I want a solution to this issue. I  configured the same subnet on my laptop and plugged directly to the  Modem, and it worked perfectly. But its not working with the 1811 ISR  FastEthernet 0 interface.

Could it be an encapsulation mismatch? The router in use presently is a Mikrotik router and its working fine.

Please help me out!
Thanks for your usual useful contributions.

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