Command:

debug ip igrp events


Mode:

Router#


Syntax:

debug ip igrp events [ip-address]

no debug ip igrp events [ip-address]

Syntax Description:

ip-address (Optional) The IP address of an IGRP neighbor.

Command Description:

 

To display summary information on Interior Gateway Routing Protocol (IGRP) routing messages that

indicate the source and destination of each update, and the number of routes in each update, use the

debug ip igrp events privileged EXEC command. The no form of this command disables debugging

output.

 

If the IP address of an IGRP neighbor is specified, the resulting debug ip igrp events output includes

messages describing updates from that neighbor and updates that the router broadcasts toward that

neighbor. Messages are not generated for each route.

This command is particularly useful when there are many networks in your routing table. In this case,

using debug ip igrp transactions could flood the console and make the router unusable. Use debug ip

igrp events instead to display summary routing information.

 


Example:

The following is sample output from the debug ip igrp events command:

 

Router# debug ip igrp events

IGRP: sending update to 255.255.255.255 via Ethernet1 (160.89.33.8)

IGRP: Update contains 26 interior, 40 system, and 3 exterior routes.

IGRP: Total routes in update: 69

IGRP: sending update to 255.255.255.255 via Ethernet0 (160.89.32.8)

IGRP: Update contains 1 interior, 0 system, and 0 exterior routes.

IGRP: Total routes in update: 1

IGRP: received update from 160.89.32.24 on Ethernet0

IGRP: Update contains 17 interior, 1 system, and 0 exterior routes.

IGRP: Total routes in update: 18

IGRP: received update from 160.89.32.7 on Ethernet0

IGRP: Update contains 5 interior, 1 system, and 0 exterior routes.

IGRP: Total routes in update: 6

 

This shows that the router has sent two updates to the broadcast address 255.255.255.255. The router

also received two updates. Three lines of output describe each of these updates.

The first line indicates whether the router sent or received the update packet, the source or destination

address, and the interface through which the update was sent or received. If the update was sent, the IP

address assigned to this interface is shown (in parentheses).

IGRP: sending update to 255.255.255.255 via Ethernet1 (160.89.33.8)

The second line summarizes the number and types of routes described in the update:

IGRP: Update contains 26 interior, 40 system, and 3 exterior routes.

The third line indicates the total number of routes described in the update:

IGRP: Total routes in update: 69


Misconceptions:

           None.


Related Commands:

            None. 


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