AAA billing supported by Cisco routers Step 1: configure the basic interface Router (config) # host Rack244R1Rack244R1 (config) # int e0/0Rack244R1 (config-if) # ip add 12.0.0.1 255.255.255.0Rack244R1 (config-if) # no shRack244R1 (config-if) # int e1/0Rack244R1 (config-if) # ip add 172.16.18.11 then (config-if) # no shRouter (config) # host Routing (config) # int e0/0Rack244R2 (config-if) # ip add 12.0.0.2 255.255.255.0cRack244R2 (config-if) # no sh www.2cto.com Step 2: configure AAA billing for R1 Rack244R1 # conf tRack244R1 (config) # aaa authentication login default group tacacs + Rack244R1 (config) # aaa accounting exec telnet start-stop group tacacs + Rack244R1 (config) # aaa accounting commands 15 telnet-cmd start-stop group tacacs + Rack244R1 (config) # tacacs-server host 172.16.18.203 key ciscoRack244R1 (config) # li vty 0 4Rack244R1 (config-line) # accounting exec telnetRack244R1 (config-line) # accounting exec telnetRack244R1 (config-line) # accounting commands 15 telnet-cmdRack244R1 (config-line) # www.2cto.com Step 3: telnet R1Rack244R1 # telnet 12.0.0.1Trying 12.0.0.1... openUsername: ciscoPassword: Rack244R1> ciscoTranslating "cisco" Translating "cisco" % Unknown command or computer name, or unable to find computer addressRack244R1> enPassword: Rack244R1 # conf t Step 4: enter some commands to generate billing information Rack244R1 (config) # ip route 0.0.0.0 0.0.0.0 12.0.0.2Rack244R1 (config) # router ripRack244R1 (config-router) # ver 2Rack244R1 (config-router) # net route (config-router) # exitRack244R1 (config) # router ospf 94Rack244R1 (config-router) # net 0.0.0.0 0.0.0.0 a 0Rack244R1 (config-router) # exitRack244R1 (config) # Step 5: You can see that the billing information has been generated.