BGP VPNv4 Troubleshooting Commands

bgp vpnv4 troubleshooting commands rogers ccie blog

When working with MPLs Layer 3 VPN a lot of people get stuck with the verification, simply because they don't know the bgp vpnv4 troubleshooting commands. This post will step through some of the verification you can use to verify the routes end to end through a simple MPLS Layer 3 vpn topology. The topology I will be using is below and is a very simple 3 router core with one vrf  and ospf being the CE to PE protocol on each side. I have created vrf ONE on Router 3 and on Router 5, OSPF 1 Area 0 is running between R3,R4,R5 and R3 is peering with MP-BGP to R5 All your troubleshooting commands will now need to include vpnv4 and the commands do get quite long. Here are my top bgp vpnv4 troubleshooting commands. BGP VPNv4 … [Read more...]

Awesome Putty tips and tricks for work and the CCIE Lab!

putty tips and tricks windows on top

If you use Putty on a daily basis or have only encountered it in the CCIE lab exam then you will know what a great tool it is. Simple and effective (with no tabs!) Most people though may not use putty on a daily basis preferring something like SecureCRT so will not be familiar with changing putty settings. Here are a few of my putty tips and tricks. In this short blog post I will go through some of the changes I make to my putty client. When you are sitting the CCIE Lab exam you have 8 hours in front of a different keyboard, mouse and monitor. You want to try and make the experience as familiar as possible, well you can't change the mouse or keyboard or monitor,  but what you can change is the putty settings. The most annoying one … [Read more...]

BGP Peer in wrong AS

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When configuring BGP with a remote peer you might get the error message BGP peer in wrong AS *Apr 18 08:39:15.455: %BGP-3-NOTIFICATION: received from neighbor passive 2/2 (peer in wrong AS) 2 bytes 0002 This means that you have mis-matched AS numbers in your BGP configuration. You can phone up the remote end and ask them what their AS number is. But if you cannot do that there is one way. The answer to this problem is given to you in the log message. The HEX number at the end of the log message 0002 is telling you that the remote AS is 2 If you change your neighbor statement to be 2 the peering should come up. R1#sh run | sec router bgp router bgp 1 no synchronization bgp log-neighbor-changes neighbor … [Read more...]

How to become a network engineer

how to become a network engineer

If you have arrived on this page then I would assume  you know what a network engineer is and would like to find out how to become a network engineer? If you are not sure what a network engineer is or does then the picture below explains it very well Picture courtesy of A network engineer is somebody who is responsible within a company for all the equipment that makes up the network. The network is what connects all the PC's and servers together, internet access, links to remote sites, wireless, adsl links etc etc. Now in a small company the network might just consist of one switch to connect 20 PCs, one server, and internet connection and maybe a wireless router. You would not need a full time … [Read more...]

f.lux – Software to make your life better

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Ever notice how people texting at night have that eerie blue glow? Or wake up ready to write down the Next Great Idea, and get blinded by your computer screen? During the day, computer screens look good—they're designed to look like the sun. But, at 9PM, 10PM, or 3AM, you probably shouldn't be looking at the sun. f.lux fixes this: it makes the color of your computer's display adapt to the time of day, warm at night and like sunlight during the day. It's even possible that you're staying up too late because of your computer. You could use f.lux because it makes you sleep better, or you could just use it just because it makes your computer look better. I have just installed this and an very impressed. At night it makes the … [Read more...]