Command Reference

show ip eigrp neighbors

To display the neighbors discovered by Enhanced IGRP, use the show ip eigrp neighbors EXEC command.
show ip eigrp neighbors [type number]

Syntax Description

type

(Optional) Interface type.

number

(Optional) Interface number.

Command Mode

EXEC

Usage Guidelines

This command first appeared in Cisco IOS Release 10.3.

Use the show ip eigrp neighbors command to determine when neighbors become active and inactive. It is also useful for debugging certain types of transport problems.

Sample Display

The following is sample output from the show ip eigrp neighborscommand:
Router# show ip eigrp neighbors
IP-EIGRP Neighbors for process 77
Address                 Interface     Holdtime Uptime   Q      Seq  SRTT  RTO
                                      (secs)   (h:m:s)  Count  Num  (ms)  (ms)
160.89.81.28            Ethernet1     13       0:00:41  0      11   4     20
160.89.80.28            Ethernet0     14       0:02:01  0      10   12    24
160.89.80.31            Ethernet0     12       0:02:02  0      4    5     20
  
The following table explains the fields in the output.

Field Description

process 77

Autonomous system number specified in the router configuration command.

Address

IP address of the enhanced IGRP peer.

Interface

Interface on which the router is receiving hello packets from the peer.

Holdtime

Length of time, in seconds, that the Cisco IOS software will wait to hear from the peer before declaring it down. If the peer is using the default hold time, this number will be less than 15. If the peer configures a nondefault hold time, it will be reflected here.

Uptime

Elapsed time, in hours, minutes, and seconds, since the local router first heard from this neighbor.

Q Count

Number of Enhanced IGRP packets (Update, Query, and Reply) that the software is waiting to send.

Seq Num

Sequence number of the last update, query, or reply packet that was received from this neighbor.

SRTT

Smooth round-trip time. This is the number of milliseconds it takes for an Enhanced IGRP packet to be sent to this neighbor and for the local router to receive an acknowledgment of that packet.

RTO

Retransmission timeout, in milliseconds. This is the amount of time the software waits before retransmitting a packet from the retransmission queue to a neighbor.

type	(Optional) Interface type.
number	(Optional) Interface number.

Field	Description
process 77	Autonomous system number specified in the router configuration command.
Address	IP address of the enhanced IGRP peer.
Interface	Interface on which the router is receiving hello packets from the peer.
Holdtime	Length of time, in seconds, that the Cisco IOS software will wait to hear from the peer before declaring it down. If the peer is using the default hold time, this number will be less than 15. If the peer configures a nondefault hold time, it will be reflected here.
Uptime	Elapsed time, in hours, minutes, and seconds, since the local router first heard from this neighbor.
Q Count	Number of Enhanced IGRP packets (Update, Query, and Reply) that the software is waiting to send.
Seq Num	Sequence number of the last update, query, or reply packet that was received from this neighbor.
SRTT	Smooth round-trip time. This is the number of milliseconds it takes for an Enhanced IGRP packet to be sent to this neighbor and for the local router to receive an acknowledgment of that packet.
RTO	Retransmission timeout, in milliseconds. This is the amount of time the software waits before retransmitting a packet from the retransmission queue to a neighbor.