Configuring and Verifying EIGRP

Network commands and router eigrp are used to create the EIGRP routing process. To be noted that an (AS) autonomous system number is required for the EIGRP. While routing in the internet with the (BGP) Border Gateway Protocol the autonomous system is need not be registered in this case. And to exchange the routing information among the routers all should using the same AS number with in the same AS number. The following figure shows the configuration of EIGRP in a simple form of network.                                                

To the router which is directly connected the network command defines an important and major network number.

Those which have an IP address and the networks are specified by the network commands have the EIGRP looks for the interfaces and with the command the EIGRP process in this sort of interfaces.

The command are shown below in a table for example:

Command	Description
Router eigrp 100	It helps to enable the routing process for EIGRP in AS 100
Network 172.16.0.0	It will associates network 172.16.0.0 with the EIGRP
Network 10.0.0.0	It is associating the network with 10.0.0.0 along the EIGRP routing process

In these the updates are send by EIGRP with the interface of the networks 10.0.0.0 and the 172.16.0.0. And these includes the information on the 10.0.0.0 and 172.16.0.0 and the any networks which are learning the EIGRP.

At the classful boundary the EIGRP summarizes the rotes in an automatically manner. And in some case the requirement of the automatic summarization is need not required. When consider an example of discontinuous networks have occurred there is a need of disabling the automatic summarization in order to minimize the router confusion.

There we should use the no auto-summary command in the EIGRP router configuration mode in order to disable the automatic summarization.

Various sort of commands are used in the display information in order to show the display information on the working and operation of the protocol, after the EIGRP is enabled. The current EIGRP entries in the routing table are displayed by using the command show ip route eigrp.

The current state and the parameters of the active routing protocols process are showed by using the command show ip protocols.  EIGRP AS number is showed by the command, it does also displays the neighbour, distance information, display filtering and the redistribution numbers. And the advertised in the router by the protocol and the network.

The following table describes the various significant fields which are generated by the show ip eigrp interfaces output.

Field	Description
Interface	EIGRP is configured in the interface
Pending Routes	Various number of the different routes in the packets which are in queue and waiting to be sent.
Mean SRTT	Average smoothed round-trip time (SRTT) interval (in milliseconds) for all neighbours on the interface
Multicast Flow Timer	Number of milliseconds to wait for acknowledgment of a multicast packet by all neighbours before transmitting the next multicast packet
Peers	The number of EIGRP neighbours in the interface which are connected directly
Pacing Time Reliable/Un	Number of milliseconds to wait after transmitting reliable and unreliable packets
Xmit Queue Reliable/Un	Various number of packets which are remaining in the reliable and unreliable queues