Cisco dual-line access scheme

(One address configuration)

R1 (config) #int f0/0

R1 (config-if) #ip add 61.153.177.1 255.255.255.0

R1 (config-if) #no shut

%link-5-changed:interface fastethernet0/0, CHANGED state to up

R1 (config-if) #int F0/1

R1 (config-if) #ip add 192.168.1.1 255.255.255.0

R1 (config-if) #no shut

R1 (config) #int s1/0

R1 (config-if) #ip add 112.55.33.1 255.255.255.0

R1 (config-if) #no shut

Telecom R1 (config) #ip Route 0.0.0.0 0.0.0.0 61.153.177.3

Netcom R1 (config) #ip Route 113.55.33.0 255.255.255.0 112.55.33.11

R1 (config) #ip Route 114.55.33.0 255.255.255.0 112.55.33.11

Two (NAT configuration)

R1 (config) #int f0/0

R1 (config-if) #ip Nat outside

R1 (config-if) #exi

R1 (config) #int s1/0

R1 (config-if) #ip Nat outside

R1 (config-if) #end

NAT Address Pool

R1 (config) #ip nat pool WT 112.55.33.5 112.55.33.5 netmask 255.255.255.0

R1 (config) #ip nat Pool dx 61.153.177.2 61.153.177.2 netmask 255.255.255.0

Configure two route map

Route-map ISP2 Permit 10

Match IP Address 100

Match int s1/0

Route-map ISP1 Permit 10

Match IP Address 100

Match int f0/0