I have 877W router.It is connected to ADSL to the IP-address 1.2.3.4.To the same address is routed block of IP-adresses 5.6.7.128/15I configure to Interface Vlan1 IP address 10.0.0.254 255.255.255.0andIP address 5.6.7.142 255.255.255.240 secondaryNow...