Topology Discovery Using Cisco Discovery Protocol

Details Topology Discovery Using Cisco Discovery Protocol Topology Discovery Using Cisco Discovery Protocol

2009-07-13

arxiv.org/abs/0907.2121v1

Computer Science

Networking and Internet Architecture

Scientific paper

In this paper we address the problem of discovering network topology in proprietary networks. Namely, we investigate topology discovery in Cisco-based networks. Cisco devices run Cisco Discovery Protocol (CDP) which holds information about these devices. We first compare properties of topologies that can be obtained from networks deploying CDP versus Spanning Tree Protocol (STP) and Management Information Base (MIB) Forwarding Database (FDB). Then we describe a method of discovering topology of CDP-based networks. Our experiments show that the physical topology of the network including links that are in Forwarding Block state can be discovered.

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