Decapsulation ERSPAN Traffic With Open Source Tools

Cisco Encapsulated Remote SPAN (ERSPAN) feature allows to monitor traffic on one or more ports and send the monitored traffic to one or more destination ports.  Traffic is encapsulated into GRE tunnel and routed via network to ERSPAN destination. Any device that supports ERSPAN can be used as ERSPAN destination. It might be another Cisco device […]
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Qemu ASAv Appliance as Personal Firewall on Linux

The article discuss how to run Cisco Adaptive Security Virtual Appliance (ASAv) on KVM hypervisor as your personal firewall. Since ASAv version 9.3.2-200, Cisco supports deploying ASAv using Kernel-based Virtual Machine (KVM). Thanks for the support of KVM hypervisor, ASAv can be deployed  in a very easy manner on Linux and no mysterious hacks are needed anymore. […]
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How to show captured data from Cisco IOS on the fly in Wireshark/tcpdump

Monitor features in Cisco devices are able to show data flows but Cisco IOS lacks the option to export data on the fly. I wrote tiny GNU/Linux shell script to solve this restriction. That is something like ASA capture (https://supportforums.cisco.com/document/69281/asa-using-packet-capture-troubleshoot-asa-firewall-configuration-and-scenarios) via HTTP/HTTPS. I tested script on: Router(config)#uname -a IOSv Router IOS 15.4 Cisco IOS Software, vios […]
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Cisco Virtual IOS on GNS3

The tutorial discuss the use of  GNS3 software to run Cisco Virtual IOS (vIOS). Cisco vIOS is  shipped and supported as a part of the Cisco’s One Platform Kit (onePK) that is distributed in form of virtual machine. It might be downloaded with Cisco.com account. Currently, it is not required to have Cisco account associated with service […]
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Cisco ASAv Virtual Appliance on VMware Workstation

This article provides step-by-step guide for setting Cisco ASAv Virtual Appliance on VMware – Workstation,  Player or  Fusion. Thanks go to the original author of the idea of copying deployed ASAv files from vSphere datastore to a local host. Prerequisites: a) VMware vSphere 5.x with the following components • ESXi Server • vCenter Server • vSphere Web Client or […]
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Cisco CSR 1000v Installation on Qemu Virtual Machine

The Cisco IOS XE Release 3.10 brings support for Kernel Based Virtual Machine (KVM) hypervisor. Thanks to the this awesome enhancement, Cisco CSR 1000v running IOS XE  3.10 can be easily connected to devices running inside GNS3 topology.  The goal of this tutorial is to install CSR 1000v IOS XE 3.10 on a virtual machine […]
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Managing Cisco CSR 1000v installed on VMware player

In a previous tutorial we installed the Cisco CSR 1000v (IOS-XE Release 3.9.1S) router on a Virtual machine run by VMware player 5.0.1. In this tutorial we are going to activate an evaluation licence for CSR 1000v (IOS-XE  3.10.0S) and clone Virtual machine using VMware player. The last part will explain how can be CSR 1000v, Minicom and VMware player […]
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Testing 802.1Q and Multicast Traffic between the Cisco CSR 1000v and the Cisco 3725 Router

In a previous tutorial we explained how to connect Cisco CSR 1000v running on VMware player to the Cisco Multiservice access router 3725 emulated by Dynamips and running inside GNS3. We will use the same network topology in order to test if the multicast traffic and 802.1Q tagged traffic is transferred correctly between the routers. Picture 1 […]
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Connecting Cisco CSR 1000v Series Cloud Services Router to GNS3

The goal of the article is to install Cisco Cloud Services Router (CSR) 1000v on VMware Virtual Machine and connect CSR 1000v router to the Cisco 3725 router running inside GNS3.  Testing transfer of multicast and 802.1Q tagged traffic between the routers is explained in the upcoming tutorial. The LAB Software Requirements Linux Fedora 17 x86_64 Cisco […]
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How to connect Cisco 7206VXR running inside GNS3 on Linux to Cisco Configuration Professional 2.2

The article shows how to connect router Cisco 7206VXR running inside GNS3 Linux version with Cisco Configuration Professional 2.2 (CCP). According to the reference ccp_rel_notes sheet the only router available in GNS3 and supported by CCP together is Cisco 7206VXR. Note:   Cisco IOS running on the router should minimum  12.4(9)T version. WAN connection for 7206VXR […]
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