What the....!You can't change your default gateway just like that. Does subnet mask make any sense to you? A subnet mask of 255.255.255.0 for each CTO LAN means only the last number(octet) in a 10.x.x.x form can change.If you change your gateway to some arbitrary number, your data packets will go nowhere, they will get dropped.Why are you still coming up with stupid ways to justify that the data transfer cap of Sify is not there? You're sounding like the half-witted CTOs that Sify has unleashed on us, which is not surprising because you are a CTO and half-witted.