I have come across some interesting behaviour at the interface level with EIGRP. Dynamic By default many people use the network command to form a neighbor with EIGRP. This involves sending Hellos to 224.0.0.10 or FE02::A at the default interval…

So far the blog has configured logical routing and logical switching. This has provided us connectivity between our application tiers. It has come to a point now where an administrator will determine how their application will be accessed. To provide…

I have been configuring a rather large topology within my GNS3 environment of late and it is composed of many peers. At this stage I had a plethora of peelings up. The diagram below highlights a small subset of a…

Logical boy in a logical world

There always has been to the idea of thinking in the logical headspace. Since the inception of Virtual Local Area Networks the wizards of the ether, Network Administrators, have had a notion of a logical and physical representation of the…

Cisco CCIE v5

As the news spreads the internet and as many people waited and speculated Cisco released the blueprint for the CCIE routing and switching version 5! This is one of the biggest steps forward in my opinion of the CCIE in…

I have previously blogged here and over at Packet Pushers about EIGRP not really being open. Since then I have changed my mind and albeit EIGRP is not quite there, I would consider it moving forward in a next generation…

In some situations with various technologies you require ultra fast fail-over. There are design considerations in which you may require a lower fail-over than 200 millisecond. Lets look at how you can improve this. This post looks at L2 switch…

As I march onwards to the CCIE written the need is apparent that you must understand every trick and caveat of a routing protocol. I have been reading up and working on RIP this weekend and amongst the funny situations…

The previous post to this one in my Plexxi series discussed the platform in which Plexxi deliver their software solution. The hardware was rounded off and numbers fired off. The optical cable pass through and topologies were discussed. That was…

First world DC problems Cloud computing has thrust multi-tenant DC’s forward in their advancements. The elasticity required for rapid deployment has pushed the bounds of many fields including storage, virtualisation, server architectures, and orchestration. As our environments onboard different customers…

For a while I pondered the benefits of a vSwitch and enjoyed the notion of a distributed vSwitch. These items were extremely flexible for virtual networking in VMware’s hypervisor switching construct. The ability to create VLANs, port groups, PVLANs, automated…

Quick one today and a memory refresh for myself. Routed L3 links between a SRX and an EX2200-C. I have currently two up links connected between the two. I want to advertise a L3 VLAN across to the SRX. I…

Ever needed to deploy a device where multiple engineers are working in tandem. This could possibly be from different sites or someone peer reviewing configurations with you. I have. I have also not be able to access a phone or…

As many of you are well aware I own a Juniper Networks SRX110H-VA firewall. THis firewall has been the focus of many blogs up until now. I have covered off a myriad of subjects with many more to come in…

Today I passed the Juniper Networks JNCIA JUNOS exam. I am quite elated to be honest. My roots as a network engineer have come from the Cisco Network academy and I have climbed part of their certification tree. Upon acquisition…

Floating static routes are known as something different in the world of Juniper. Qualified Next Hops. It allows an independent routing preference on a route where there is two routes to the same destination. This blog here will show you…

Currently I am getting a big dose of the Juniper sauce. I like it thus far. The device that has been getting my whistle wet is the SRX110. This bad boy was plonked between my desktop and current network. I…