Part 0: Logical View
Design a logical diagram of the network.
Example
Using 2811 router with HWIC-2T module and DCE connection.
Part 1: Initial Config
Enters privileged EXEC mode.
en
Enters global configuration mode.
conf t
Adding Hostname and Password
hostname NAME
enable secret PASS
Configuring Console Line with Password
line console 0
password PASS
login
exec-timeout 0 0
Configuring VTY Line with Password
line vty 0 4
password PASS
login
exec-timeout 0 0
Adding Banner
banner login #
Password Encryption
Encrypts plaintext passwords in the configuration.
service password-encryption
Verification
sh run
Repeat
Do the initial config for each router.
Part 2: Adding IP Addresses
Displaying Interfaces
Displays brief information about all interfaces and their IP addresses.
sh ip int brief
Configuring Serial Interface
Enters configuration mode for the specified serial interface.
int serial n/n/n
Assigning IP Address
Assign an IP address and subnet mask to the interface.
ip add IP_ADDRESS SUBNET_MASK
Example
For Router0
ip add 192.168.50.2 255.255.255.0
Enabling Interface
Enables the configured interface.
no shut
Configuring Loopback Interface
int loopback0
ip add IP_ADDRESS SUBNET_MASK
(Increment the Loopback address by 1)
Example
For Loopback0 in Router0 (192.168.0.0/24)
ip add 192.168.0.1 255.255.255.0
Adding Clock Rate
Only for ports with clock symbol.
clock rate VALUE (128000)
Repeat
Repeat the steps for each router and port.
Example
For Router0
Verification
Now we can ping direct connections.
ping IP_ADDRESS
Part 3: Adding Routes (Method 1)
We can ping direct addresses, but not remote ones.
Before we can ping them, we need to configure routes.
Identifying Remote Addresses
A remote address means it is not directly connected.
Example
So there are 4 remote addresses for Router0:
Adding Static Routes
Now that we know what the remote addresses are, we can add routes to them. (Repeat for every remote address.)
There are 2 ways of doing this:
ip route REMOTE_IP_ADDRESS SUBNET_MASK serial n/n/n (exit interface)
or
ip route REMOTE_IP_ADDRESS SUBNET_MASK IP_ADDRESS (next hop ip address)
Just use the exit interface method for now.
Example
For Router0 (4 remote addresses)
ip route 192.168.30.0 255.255.255.0 serial0/2/0
ip route 192.168.60.0 255.255.255.0 serial0/2/0
ip route 192.168.40.0 255.255.255.0 serial0/2/0
ip route 192.168.20.0 255.255.255.0 serial0/2/0
For Router1 (2 remote addresses)
ip route 192.168.0.0 255.255.255.0 serial0/2/0
ip route 192.168.20.0 255.255.255.0 serial0/2/1
For Router2 (4 remote addresses)
ip route 192.168.30.0 255.255.255.0 serial0/2/1
ip route 192.168.60.0 255.255.255.0 serial0/2/1
ip route 192.168.50.0 255.255.255.0 serial0/2/1
ip route 192.168.0.0 255.255.255.0 serial0/2/1
Displaying Routing Table
Displays the IP routing table.
sh ip route
Verification
After configuring routes for every router, we can now ping remote addresses.
ping IP_ADDRESS
Part 3: Adding Routes (Method 2)
Using RIPv2 method.
Enabling RIP Routing
router rip
Identify Directly Connected Addresses
Needed for the next step.
Configuring the Networks to Use RIP
Use the network command followed by the directly connected address.
Example
network 192.168.50.0
network 192.168.0.0
Enabling RIP Version 2
version 2
Disabling Auto Summary
no auto-summary
Enabling Passive Interface
Specify that all interfaces should be passive by default (not sending RIP updates).
passive-interface default
Except for specific interfaces:
Example
no passive-interface serial0/2/0
no passive-interface loopback0
Verifying RIP configuration
sh ip protocols
sh ip route rip