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we will quickly discuss the use of most commonly needed IGMP timers. First, as we know, multicast routers periodically query hosts on a segm... -
This post will go through from start to finish the configuration required to setup a basic MPLS VPN which has 2 customers, each customer has... -
For a few days ago I had to find a solution for a customer that could provide VLAN-to-VLAN traffic over Internet between 2 locations. I foun... -
I would like to share a basic MPLS configuration example where I will explain how MPLS works and what are the different steps in order to co... -
When faced with a troubleshooting ticket involving MPLS you need to clear the basics first to ensure that everything is working from a Label... -
The other day I found a handy script on Cisco EEM scripting community that can automatically archive the running-config if a a change has b... -
BPDU Filtering, BPDU Guard, and Root Guard are STP security mechanisms. In this post I will only describe BPDU Filtering and BPDU Guard. T... -
Rapid Spanning Tree 802.1w reduced the number of port states from 5 down to 3 this short blog post details the 5 STP port states for Spannin... -
I would like to dedicate this post to MPLS L3 VPNs troubleshooting and more particularly using the Traceroute command. It can be sometimes d... -
In this post I will talk about Cisco Zone Based Firewall (ZBF) which is a new approach to configure access control in the IOS firewall. I wi...
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