Exercise: Cisco config and static routes

1. Login to Unix PC as "t2". Erase your Cisco and do basic configuration
   

   $ tip cisco
   [Hit enter]
   Would you like to enter the initial configuration dialog? no
   Press RETURN to get started!
   [Hit enter; wait a few seconds]
   Router>enable
   Router#write erase
   Router#reload
   

   (If you can't get this far, then you need to follow the Cisco password recovery procedure)

   ...
   Router>enable
   Router#conf t
   Router(config)#hostname t2-router1
   t2-router1(config)#enable secret t2@afnog
   t2-router1(config)#service password-encryption
   t2-router1(config)#no ip domain-lookup
   t2-router1(config)#line vty 0 4
   t2-router1(config-line)#login
   t2-router1(config-line)#password t2@afnog
   t2-router1(config-line)#  [Hit ctrl-Z]
   t2-router1#show run
   ...
   t2-router1#write mem
   

   You can leave tip running on this screen and switch to another screen with Alt-F2, Alt-F3 etc. If you want to exit tip, type [Enter] ~ .

   Note: you would normally use DIFFERENT passwords for enable and login, so you can give login access to your NOC staff without letting them change configurations.

2. Configure your PC for IP

   login as 'root'
   # ifconfig ed0 137.158.218.1 netmask 255.255.255.248
   # route add default 137.158.218.6
   
   Check your config is running by using:
   # ifconfig -a
   # netstat -rn
   

3. Configure your Cisco E0 (or E0/0) interface

   t2-router1#conf t
   t2-router1(config)#int e0 [2500] or  int e0/0 [2600]
   t2-router1(config-if)#ip address 137.158.218.1 255.255.255.248
   t2-router1(config-if)#no ip proxy-arp
   t2-router1(config-if)#no ip redirects
   t2-router1(config-if)#no shutdown
   t2-router1(config-if)#  [Hit ctrl-Z]
   t2-router1#show int e0
   

4. Connect PC and Cisco to hub. Check PC and Cisco can ping each other

   t2-router1#ping 137.158.218.6
   

   Also try pinging the router from the PC

5. Configure your Cisco E1 (or E0/1) interface

   Same as step 3, but use the correct interface, address and netmask

6. Check your Cisco can ping other Ciscos on the backbone

   t2-router1#ping 137.158.218.130
   t2-router1#ping 137.158.218.131   etc
   

7. Save your config at this point

   t2-router1#write mem
   

8. Add static routes to reach other desks' networks

   t2-router1#conf t
   t2-router1(config)#ip route 137.158.218.8 255.255.255.248 137.158.218.130
   ...add routes for other desks...
   t2-router1(config)#  [Hit ctrl-Z]
   t2-router1#show ip route
   

   Notice how some routes are labelled C (directly Connected) and others are labelled S (Static routes)

   NOTE: DON'T SAVE YOUR CONFIG! (This is to make it easier to remove all those static routes later on)

9. Check your PC can reach other PCs on your row and in the rest of the class

   $ ping 137.158.218.9
   
   $ traceroute -n 137.158.218.9
   

   If it can't see them yet - why not?

10. Make your PC's IP configuration permanent

    login as 'root'
    # vi /etc/rc.conf and uncomment these lines:
    ifconfig_ed1="inet 137.158.218.1 netmask 255.255.255.248"
    defaultrouter="137.158.218.6"
    

    Reboot your PC, login again, and check your config is running by using:

    # ifconfig -a
    # netstat -rn