JUNOS Disable vs Deactivate interfaces

NETspresso

Confusing between disabling and deactivating interfaces on JUNOS is a common mistake that leads to all sorts of problems during implementing changes on live network boxes. Let’s look and clarify the differences quickly. Disabling an interface: Disabling an interface in JUNOS is equivlaent to interface shutdown in Cisco, it is going to take the interface administratevly down completely without impacting the configuration on that interface as you can see below. --- Interface in UP UP state triton@neptune> show interfaces ge-0/0/0 terse Interface               Admin Link Proto    Local                 Remote ge-0/0/0                up    up ge-0/0/0.0              up    up   inet     172.18.0.1/24 -- Disable the interface triton@neptune> …

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SDN is an Iteration that will Lead Innovations

Good_Read

I have stumbled upon a recent post from Greg Ferro on Ethrealmind, the post is titled SDN is not an innovation, it’s an iteration. I actually wanted to share this post because it kind of puts things into prespective. The word innovate refers to creating something that is new and disruptive. Innovations needs to come with a whole new paradigm for doing the things we are doing. At one time it was easier to apply the term to the work of Newton, Einstein or  Nicola Tesla. These days, it’s  much harder to apply the term to things, that are just …

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Software-Defined Networks .. A Primer

SDN,_Ethernet_y_NFV

SDN, Software-Defined Networking, the trending technology that some friends/colleagues of mine like to refer to it as “Still Does Nothing”. Let’s see if it does some thing. SDN has been a market hype for few years now.  Out of laziness, I ignored it in the beginning then I had to catch up a bit later and learn what was exactly going on.  From who I know many engineers have taken the same path and are still ignoring SDN, probably out of the feeling that we have enough to learn something new. Lately, SDN has been reduced to a buzzword that …

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Troubleshoot#2: Core Dumps for Network Engineers

Source:https://github.com/coredump-ch

Got a core dump file, please contact your TAC engineers for further support ! This is the common statement that we all see on vendors’ websites and in their recommendations and it definetly is true.  The reason is that a core dump file contains information that requires deep knowledge of the code of the cored application to make use of it. However, this doesn’t mean that core dump files are totally “this is not your business” thing. Network operations teams can use core dumps strategically to help their vendor’s support find and fix their problems quicker. I will try to …

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Cheat: your portable memory bank

How often do you find yourself scratching your head, trying to remember a command that you knew by heart but just can’t remember when you need it most? It happens to me quite often. Probably because I am aging or may be there is too much stuff in my brain attic. But I found a solution to that and it’s called Cheat. Cheat is a beautiful light weight piece of software .. Here is the excerpt from the Github documentation page for what it does.   “Cheat allows you to create and view interactive cheat sheets on the command-line. It was designed …

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Making Sense of Broadband networks: PPPoE Explained

A bit of background First .. PPPoE stands for Point to Point over Ethernet and is the successor of PPPoA. PPPoE is simply a method of encapsulating PPP packets into Ethernet frames. The standard is defined in RFC2516 . IPoE is growing very quickly but as far as I can tell PPPoE is still very widely deployed model in broadband networks. PPP protocol is a very mature protocol that was originally implemented to create and maintain direct connections between two nodes. PPP is such a protocol that provides many features but the one that is most interesting to broadband providers is the ability …

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