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Free Cisco labs for CCNA, CCNP & CCIE !

Free Cisco labs for CCNA, CCNP & CCIE !
GNS3Vault is offering you Cisco labs and scenarios that you can download and use with the GNS3 / Dynamips software. My goal is to have a full range of labs to study for CCNA, CCNP and even CCIE. Besides "full" labs there are also plenty of labs focusing on a single technology like Frame-Relay, RIP, OSPF, EIGRP but also BGP, MPLS and many other technologies! What am I offering you? Downloadable topologies that you can use right away with the GNS3 software.Different levels of difficulty, there's something for CCNA, CCNP and CCIE students.Books that will help you study in case you get stuck.Can't find what you are looking for? Let me know and I'll build it.The largest collection of GNS3 Cisco R&S labs on the Internet.And the best thing...all labs are FREE!

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AAA and VTYs in IOS-XR : Bingo Continuing on the IOS-XR saga, this is the newest bunch of things that don't "work as expected" (© Cisco). Well, as expected by me, not by Cisco. Everything started while trying to configure a primary and backup aaa login method on an ASR9k, when i realized that... 1) having a backup aaa login method with the same tacacs servers as the ones in the primary aaa login method (which is using the management vrf) doesn't work Packet Life ASR9000/XR: The concept of a SMU and managing them Introduction A SMU is a software maintenance update, or simply put a patch, that can be loaded on the XR device you are running. The concept of a SMU applies to all XR devices, although this article focuses on the ASR9000 primarily. When the system is running into a SW deficiency (a.k.a. a bug) Cisco can provide a patch for that particular problem in order for you to keep running your base release, but get free of the problem at hand.

Cisco Router Simulator Network Labs & Topologies For CCENT, CCNA, CCNP & CCIE Candidates! Understanding ELAM With the increasing complexity of networking devices and protocols, it can be extremely difficult to pinpoint the source of a networking problem. Often we need to determine if a frame was received and forwarded correctly on a particular device. There are several capturing tools, debugs, and tricks available to help answer this question. However, not all are feasible or available to run on a production network. ELAM (Embedded Logic Analyzer Module) is an engineering tool that gives us the ability to look inside Cisco ASICs and understand how a packet is being forwarded. ELAM is “embedded” within the forwarding pipeline and can capture a packet in real time without affecting performance or control plane resources.

Graphical Network Simulator Innovative Troubleshooting Tools in Cisco Switches At Cisco TAC, when the phones ring for P1/P2 outages, a typical problem we hear from customers is about connectivity issues between end-hosts and/or end-users' application performance issues. In an enterprise core/distribution and datacenter network, where virtual switching solutions (like, VSS or vPC) are highly deployed with large number of port-channels / redundant links, it is challenging and critical to trace the path of the packet to identify the device, link and port causing the above-mentioned problems. How does a TAC engineer really find the device / link / port in issue ? VirtualBox OSPF - Setting IP MTU values for Cisco and Juniper - The Network Sherpa MTU mismatches are the primary reason an OSPF adjacency becomes stuck in the EXSTART state. After hellos are exchanged and the routers become neighbors, each OSPF speaker advertises the IP MTU of it’s local interface in a Data Base Description (DBD) LSA. If there is a mismatch you’ll probably just adjust the configuration to be identical on both ends of the link and be done. However, when you try to peer two OSPF routers with different network operating systems, things start to fall apart fairly quickly.

Cisco IOS Shell Configuration Guide, Cisco IOS Release 15.1M - Cisco IOS Shell [Support] Cisco IOS Shell First Published: March 25, 2011 Last Updated: March 30, 2011 The Cisco IOS Shell ( feature provides shell scripting capability to the Cisco IOS command-line-interface (CLI) environment.

LAN, Switching and Routing C3750 Switch Family Egress QOS Explained Understanding the Egress QOS Logic on the C3750/C3560/C3750E/C3560E platforms. (Alternate Title: Egress QOS for dummies) Table of Contents Sourcefire File Policies (aka Advanced Malware Protection) With Sourcefire ASA software modules we are able to control what file types are allowed and what are not to be downloaded or uploaded. What can be tracked depends on protocols supported by the Sourcefire and the direction of file transfer can be upload, download or both, again depending on the supported protocols. Before we go any further, in order to utilize file detection and/or blocking, we have to have a valid license. This license is named AMP and more about this can be found here. Now, with a valid license, we can’t do whatever we want.

Technology Tutorials - Waris Tech Resource Session Video Recording Session Slide Deck Session Objective Cisco end to end validated Service Provider solution “Evolved Programmable Network (EPN)”To learn about Network Transport Architecture evolution for Carrier Ethernet, Mobile Backhaul “LTE to 5G” & IoTAudience: Network Architect, Solution Architect who design and deploy SP network Agenda ostinato - Packet/Traffic Generator and Analyzer