cisco

ospf routing protocol configuration

Single Area OSPF Routing Protocol Configuration Guide

Single area OSPF routing protocol configuration is a very simple setup that can help improve network availability in your network. OSPF (Open Shortest Path First)...

Kevin Sims in Networking
Dec 13 - 6 min read

active/passive cisco asa configuration

How to setup a Cisco ASA Active/Standby Failover

Two Cisco ASA firewalls in high availability mode are highly recommended in a production scenario....

<img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo' height='36' width='36' loading='lazy' decoding='async'itemprop="image" />

Kevin Sims in Networking
Nov 28 - 2 min read

How to configure Cisco ASA site to site VPN IKEv1

This lab will walk you through how to setup a cisco asa vpn connection between 2 cisco ASA firewalls using IKEv1...

<img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo' height='36' width='36' loading='lazy' decoding='async'itemprop="image" />

Kevin Sims in Networking
Nov 24 - 4 min read

vrf-lite configuration

How to configure VRF-lite using Cisco Routers & Switches

For service providers to help support multiple customers, they must be able to virtualize the router to create multiple virtual routing tables using VRF...

<img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo' height='36' width='36' loading='lazy' decoding='async'itemprop="image" />

Kevin Sims in Networking
Sep 24 - 5 min read

configuring etherchannel load balancing

How to configure Etherchannel load balancing

LACP and PAgP support a variety of load balancing algorithms to help maintain even distribution of traffic across an Etherchannel bundle. In this lab we...

<img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' data-src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' data-srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo lazyload' height='36' width='36' loading='lazy' decoding='async'itemprop="image" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" style="--smush-placeholder-width: 36px; --smush-placeholder-aspect-ratio: 36/36;" /><noscript><img alt='' src='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=36&d=retro&r=g' srcset='https://secure.gravatar.com/avatar/d7a057c6defdf195e0f50cd91e1465aa?s=72&d=retro&r=g 2x' class='avatar avatar-36 photo' height='36' width='36' loading='lazy' decoding='async'itemprop="image" />

Kevin Sims in Networking
Sep 12 - 2 min read

etherchannel configuration

Etherchannel Configuration Guide using LACP or PAgP

The Etherchannel Configuration implemented in this guide will explore various methods of Link Aggregation, which will combine the connections into single logical channel group. Port...

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Kevin Sims in Networking
Sep 4 - 4 min read

VLAN Trunking Protocol

How To Configure Cisco VLAN Trunking Protocol Version 3

I covered the fundamentals of Cisco VLAN Trunking Protocol in a previous article (version 1 and 2). VTP version 3‘s primary purpose is to synchronize...

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Kevin Sims in Networking
Sep 1 - 3 min read

vlan trunking protocol v2

Ultimate VLAN Trunking Protocol V2 setup Guide

VLAN Trunking protocol (VTP) manages the addition, deletion, and renaming of VLANs on the entire network from a single switch. Although not used as common...

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Kevin Sims in Networking
Aug 28 - 4 min read

multiple spanning tree (mst)

How to setup Multiple Spanning Tree Protocol

Multiple Spanning Tree protocol (MST) is an open protocol derived from rapid spanning tree protocol. MSTP runs a number of VLAN-independent STP instances (representing logical...

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Kevin Sims in Networking
Aug 17 - 3 min read

show spanning tree output

(STP) Spanning Tree Protocol Explained – advanced tuning

The (STP) Spanning Tree Protocol Explained in simple terms is a link management protocol that enables path redundancy while also preventing undesired network loops. As...

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Kevin Sims in Networking
Aug 16 - 2 min read