Troubleshooting VSS Failure

Posted by: admin  :  Category: CCIE, CCNP, Switching, Troubleshooting




In this article we are going to discuss how a VSS pair reacts during a failure. There are three possible failure scenarios that may occur.

  1. Link failure in the multi-chassis port channel link.
  2. Active supervisor engine failure.
  3. VSL failure.

Continue reading “Troubleshooting VSS Failure” »

GNS3 is Holding a Network Topology Photo Challenge

Posted by: admin  :  Category: CCNP, GNS3 Dynamips, Routing, Switching



Share your best GNS3 network top0l0gy and possibly win a $250 Amazon gift card. For more information: GNS3 is Holding a Network Topology Photo Challenge Continue reading “GNS3 is Holding a Network Topology Photo Challenge” »

New Cisco IOS Requirements for Certification Exams

Posted by: admin  :  Category: CCNA, CCNP, GNS3 Dynamips, Packet Tracer


Are you preparing for Cisco certification exam and need lab equipment? If so there are a few things you need to know. The new CCNA and CCNP exam is based on the latest Cisco IOS revision 15.0 this limits the number of Cisco routers model available to use in your practice labs. The Cisco 2800 series router is the most affordable model that supports the necessary IOS version. Older router models are still useable but should have at least Cisco IOS revision 12.4 installed. But in any case your lab should contain at least one router model that supports the latest Cisco IOS revision 15.0.  Continue reading “New Cisco IOS Requirements for Certification Exams” »

Free GNS3 Lab Advanced MPLS VPN

Posted by: admin  :  Category: BGP, CCIE, CCNP, GNS3 Dynamips, OSPF


This lab is based on a lab I found on one of the forums, and in this lab we will use GNS3 to create an advanced lab consisting of 12 inter connected Cisco 3640 IOS based routers. We will use this lab to gain a better understanding of how to configure MPLS VPNs. In addition to these technologies we will review basic router configuration along with some other technologies such as OSPF, BGP, NAT, IPSEC and GRE. Continue reading “Free GNS3 Lab Advanced MPLS VPN” » Site Meter