Submit a ticketCall us

AnnouncementsAre You “Flying Blind?”

When it comes to your complex IT infrastructure, you want to ensure you have a good grasp of what’s going on to avoid any fire drills that result from guesswork. Read our white paper to learn how proactively monitoring your IT environment can help your organization while giving you peace of mind.

Get your free white paper.

Home > Success Center > IP Address Manager (IPAM) > IPAM - Knowledgebase Articles > Indirect Discovery (Neighbor Scanning) in IPAM

Indirect Discovery (Neighbor Scanning) in IPAM

Table of contents
No headers
Created by Interspire Import, last modified by Nigel on Jul 05, 2018

Views: 2,223 Votes: 1 Revisions: 9

Last modified: March 4, 2016

 

Neighbor Scanning in IPAM attempts to retrieve the status of a device that may not be responding to ICMP by scanning the ARP table of a neighbor router to see which IP addresses are active.

IPAM first checks if the device is capable of SNMP and supports ARP table:

To check whether SNMP is available, IPAM uses these OIDs:

OidSysContact     1.3.6.1.2.1.1.4.0  iso.org.dod.internet.mgmt.mib-2.system.sysContact.0

To check whether the ARP table is available:

OidIPNetToMediaTable  1.3.6.1.2.1.4.22   iso.org.dod.internet.mgmt.mib-2.ip.ipNetToMediaTable

The IPNetToMediaTable is pulled for client information. If the device supports this table, then IPAM can work with it.

Under the 1.3.6.1.2.1.4.22 OID IPAM will poll the following subsidary OIDs:

1.3.6.1.2.1.4.22.1.1 ipNetToMediaIfIndex
1.3.6.1.2.1.4.22.1.2 ipNetToMediaPhysAddress
1.3.6.1.2.1.4.22.1.3 ipNetToMediaNetAddress
1.3.6.1.2.1.4.22.1.4 ipNetToMediaType

A null return indicates the device does not support that MIB. 

Last modified

Tags

Classifications

Public