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Determining IP Routes
Enabling EIGRP
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Outline
Overview
EIGRP Features
EIGRP and IGRP Comparison
EIGRP Configuration
EIGRP Configuration Verification
EIGRP Configuration Troubleshooting
Summary
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Introducing EIGRP
EIGRP supports: Rapid convergence
Reduced bandwidth usage
Multiple network layer protocols
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EIGRP Terminology
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Comparing EIGRP and IGRP
Same metric
Same load balancing
Improved convergence time (EIGRP)
Reduced network overhead (EIGRP)
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Configuring EIGRP
Router(config-router)#network network-number Selects participating attached networks
Router(config)#router eigrp autonomous-system Defines EIGRP as the IP routing protocol
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EIGRP Configuration Example
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Verifying the EIGRP Configuration
Router#show ip protocols
Router#show ip route eigrp
Router#show ip eigrp traffic
Router#show ip eigrp neighbors
Router#show ip eigrp topology
Displays the neighbors discovered by IP EIGRP
Displays the IP EIGRP topology table
Displays the number of IP EIGRP packets sent and received
Displays current EIGRP entries in the routing table
Displays the parameters and current state of the activerouting protocol process
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debug ip eigrp Command
Router#debug ip eigrp
IP-EIGRP: Processing incoming UPDATE packet
IP-EIGRP: Ext 192.168.3.0 255.255.255.0 M 386560 - 256000 130560 SM 360960
- 256000 104960
IP-EIGRP: Ext 192.168.0.0 255.255.255.0 M 386560 - 256000 130560 SM 360960
- 256000 104960IP-EIGRP: Ext 192.168.3.0 255.255.255.0 M 386560 - 256000 130560 SM 360960
- 256000 104960
IP-EIGRP: 172.69.43.0 255.255.255.0, - do advertise out Ethernet0/1
IP-EIGRP: Ext 172.69.43.0 255.255.255.0 metric 371200 - 256000 115200
IP-EIGRP: 192.135.246.0 255.255.255.0, - do advertise out Ethernet0/1
IP-EIGRP: Ext 192.135.246.0 255.255.255.0 metric 46310656 - 45714176 596480
IP-EIGRP: 172.69.40.0 255.255.255.0, - do advertise out Ethernet0/1IP-EIGRP: Ext 172.69.40.0 255.255.255.0 metric 2272256 - 1657856 614400
IP-EIGRP: 192.135.245.0 255.255.255.0, - do advertise out Ethernet0/1
IP-EIGRP: Ext 192.135.245.0 255.255.255.0 metric 40622080 - 40000000 622080
IP-EIGRP: 192.135.244.0 255.255.255.0, - do advertise out Ethernet0/1
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Summary
EIGRP is an interior gateway protocol that scales well andprovides quick convergence times with minimal networktraffic.
EIGRP is an enhanced version of IGRP developed by
Cisco, with improved convergence properties andoperating efficiency over IGRP.
The router eigrp and network commands can be used tocreate an EIGRP routing process.
The show ip eigrp commands can be used to verify theEIGRP configuration.
The debug ip eigrp privileged EXEC command can be usedto display information on EIGRP packets.
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