Home > Articles > Certification > Cisco Certification > CCNA

  • Print
  • + Share This
This chapter is from the book Configuration Example: EIGRP

Configuration Example: EIGRP

Figure 8-1 illustrates the network topology for the configuration that follows, which shows how to configure EIGRP using the commands covered in this chapter.

Figure 8-1 Network Topology for EIGRP Configuration

Austin Router

Austin>enable

Moves to privileged mode.

Austin#configure terminal

Moves to global configuration mode.

Austin(config)#interface serial 0/0/0

Enters interface configuration mode.

Austin(config-if)#ip address 172.16.20.1 255.255.255.0

Assigns the IP address and netmask.

Austin(config-if)#ip
authentication mode
eigrp 100 md5

Enables MD5 authentication in EIGRP packets.

Austin(config-if)#ip
authentication key-chain eigrp 100 susannah

Enables authentication of EIGRP packets.
susannah is the name of the key chain.

Austin(config-if)#no shutdown

Enables the interface.

Austin(config-if)#interface fastethernet 0/1

Enters interface configuration mode.

Austin(config-if)#ip address 172.16.10.1 255.255.255.0

Assigns the IP address and netmask.

Austin(config-if)#no shutdown

Enables the interface.

Austin(config-if)#router eigrp 100

Enables EIGRP routing.

Austin(config-router)#no auto-summary

Disables auto-summarization.

Austin(config-router)#eigrp log-neighbor-changes

Changes with neighbors will be displayed.

Austin(config-router)#network 172.16.0.0

Advertises directly connected networks (classful address only).

Austin(config-router)#passive interface fastethernet 0/1

Prevents the sending of hello packets out the Fast Ethernet 0/1 interface. No neighbor adjacency will be formed.

Austin(config-router)#key chain susannah

Identifies a key chain name, which must match the name configured in interface configuration mode.

Austin(config-keychain)#key 1

Identifies the key number.

Austin(config-keychain-key)#key-string tower

Identifies the key string.

Austin(config-keychain-key)#accept-lifetime 06:30:00 Apr 19 2013 infinite

Specifies the period during which the key can be received.

Austin(config-keychain-key)#send-lifetime 06:30:00 Apr 19 2013 09:45:00 Apr 19 2013

Specifies the period during which the key can be sent.

Austin(config-keychain-key)#exit

Returns to global configuration mode.

Austin(config)#exit

Returns to privileged mode

Austin#copy running-config startup-config

Saves the configuration to NVRAM.

Houston Router

Houston>enable

Moves to privileged mode.

Houston#configure terminal

Moves to global configuration mode.

Houston(config)#interface serial 0/0/1

Enters interface configuration mode.

Houston(config-if)#ip address 172.16.20.2 255.255.255.0

Assigns the IP address and netmask.

Houston(config-if)#ip
authentication mode eigrp
100 md5

Enables MD5 authentication in EIGRP packets.

Houston(config-if)#ip
authentication key-chain
eigrp 100 eddie

Enables authentication of EIGRP packets. eddie is the name of the key chain.

Houston(config-if)#clock rate 56000

Sets the clock rate.

Houston(config-if)#no shutdown

Enables the interface.

Houston(config-if)#interface fastethernet 0/1

Enters interface configuration mode.

Houston(config-if)#ip address 172.16.30.1 255.255.255.0

Assigns the IP address and netmask.

Houston(config-if)#no shutdown

Enables the interface.

Houston(config-if)#router eigrp 100

Enables EIGRP routing.

Houston(config-router)#no auto-summary

Disables auto-summarization.

Houston(config-router)#eigrp log-neighbor-changes

Changes with neighbors will be displayed.

Houston(config-router)#network 172.16.0.0

Advertises directly connected networks (classful address only).

Houston(config-router)#passive interface fastethernet 0/1

Prevents the sending of hello packets out the Fast Ethernet 0/1 interface. No neighbor
adjacency will be formed.

Houston(config-router)#key chain eddie

Identifies a key chain name, which must match the name configured in interface
configuration mode.

Houston(config-keychain)#key 1

Identifies the key number.

Houston(config-keychain-key)#key-string tower

Identifies the key string.

Houston(config-keychain-key)#accept-lifetime 06:30:00 Apr 19 2013 infinite

Specifies the period during which the key can be received.

Houston(config-keychain-key)#send-lifetime 06:30:00 Apr 19 2013 09:45:00 Apr 19 2013

Specifies the period during which the key can be sent.

Houston(config-keychain-key)#exit

Returns to global configuration mode.

Houston(config)#exit

Returns to privileged mode.

Houston#copy running-config startup-config

Saves the configuration to NVRAM.

  • + Share This
  • 🔖 Save To Your Account