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Method and System for Identifying Unmanaged Network Devices in a Network

IP.com Disclosure Number: IPCOM000219156D
Publication Date: 2012-Jun-23
Document File: 3 page(s) / 92K

Publishing Venue

The IP.com Prior Art Database

Abstract

A method and system is disclosed for identifying unmanaged network devices in a network by crawling though IP addresses of all network devices in the network.

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Method and System for Identifying Unmanaged Network Devices in a Network

Typically, in a large network, there are network devices which are unknown from a network management perspective and unmonitored as a result. This tends to occur over time when management of the network devices is transferred to different vendors or when new devices are put under an emergency change or for other reasons. Such unknown network devices in the network management system may be difficult to identify through traditional means such as ping sweeps, especially if firewalls are present in the network devices which tend to not respond by default to typical discovery mechanisms.

Disclosed is a method and system for identifying unmanaged network devices in a network by crawling though IP addresses of all network devices in the network and viewing contents of routing tables of the network devices. A table of unique next hops are created from the routing table information and then compared to a list of all IP addresses known to the network management system. Any IP address listed in discovered next-hop table that are not listed in the network management system are flagged for investigation..

A Simple Network Management Protocol (SNMP) Poller manages all network devices in the network as illustrated in Figure 1. The SNMP Poller performs "SNMP walks" on managed devices to uncover all the IP addresses on a managed device. This information provides a data set with which to compare against the...