L3 fabric DC -The underlay Network (BGP) -part2
In the previous post, we laid the foundation of L3 fabric DC In this post we will discuss the underlay network which mainly provide IP reachability plus ECMP capability, here BGP would play a role in your DC next to the 3 other that we discussed one of the previous posts. For the sake of simplicity …
The post L3 fabric DC -The underlay Network (BGP) -part2 appeared first on Networkers-online.com.
L3 fabric DC -The underlay Network -Part1
In the previous posts we have discussed the classic DC designs and the M-LAG solution. In this post we will cover the basic L3 fabric DC, you might never heard of it or you think that’s a solution for massive scale DC, yes the massive DC in the world would be running L3 fabric but nowadays more and more customers are moving …
The post L3 fabric DC -The underlay Network -Part1 appeared first on Networkers-online.com.
TCP Protocol: Slow Start
In the last post we explained the basic idea of using sequence and acknowledgement numbers to track how many bytes were sent and received. We also has encountered the term “slow start” and elaborated how TCP uses this concept on the server to send few segments of data to the receiver instead of sending the full …
The post TCP Protocol: Slow Start appeared first on Networkers-online.com.
TCP Protocol: Flow Control
In the last two posts here and here, we have discussed how TCP stack initiates a TCP 3-way handshake and create the appropriate Transmission Control Block for the data to flow reliably. We knew that the main function of the 3-way handshaking is to exchange the sequence numbers, MSS, receive window and other parameters between …
The post TCP Protocol: Flow Control appeared first on Networkers-online.com.
Classic DC and M-LAG
In the pervious post we talked about BGP in Data Center and how it is a topic of discussion in between the DC and the SP arenas. In this post I will start explaining some classic DC design and laying its shortage which will engage the SP gurus with us, as well it will make sure …
The post Classic DC and M-LAG appeared first on Networkers-online.com.
BGP in the Data Center
If you think that BGP is a Server Provider (SP) only protocol and is not your business in the data center, then better think again because BGP is coming to your territory. Traditionally for Enterprises and DCs; BGP commonly took part at the Internet edge in multi-homing scenarios (the internet from multiple ISPs) where BGP provided …
The post BGP in the Data Center appeared first on Networkers-online.com.
What is 6PE?
6PE is one of the efficient solutions for interconnecting IPv6 islands over an IPv4-only MPLS cloud without needing to drastically change the core network design by having all your Core routers dual-stacked 6PE does not use manual standard tunnels, it provides an alternative where all tunnels are established dynamically eliminating the need to configure and …
The post What is 6PE? appeared first on Networkers-online.com.
CCIE SPv4.1 Blueprint Resources
The CCIE SP SME team has put a comprehensive list of study resources for the new CCIE SP4.1 blueprint. The complied list is in a spreadsheet designed to help you quickly find what you are looking for by organizing the content according to the exam topics. This is a very good resource for finding good …
The post CCIE SPv4.1 Blueprint Resources appeared first on Networkers-online.com.
TCP Protocol: TCP 3-way handshaking #2
In the last post, we have explained the TCP 3-way handshaking from an abstract point of view, and knew that one of the main functions of this handshaking is to exchange and synchronize some parameters for the TCP connection endpoints to facilitate its job. We also knew that two of the main parameters that the …
The post TCP Protocol: TCP 3-way handshaking #2 appeared first on Networkers-online.com.
TCP Protocol: Three-way Handshake
We all know by now that the basic function of the TCP protocol is to send a stream of bytes that has no shape or fixed size over a network reliably to a receiver. We all also know that reliable delivery involves building a connection between two end-hosts, and this will be the first step that …
The post TCP Protocol: Three-way Handshake appeared first on Networkers-online.com.
TCP Protocol: The Overview – Part1
One of the most important layers we – as network engineers – hate and avoid in the OSI reference model is the transport layer with its popular and dominant protocol; TCP. Most of network engineers abandoned diving into TCP protocol because they consider it a host-to-host communication protocol that usually works without a problem. End systems …
The post TCP Protocol: The Overview – Part1 appeared first on Networkers-online.com.
JUNOS Disable vs Deactivate interfaces
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 …
The post JUNOS Disable vs Deactivate interfaces appeared first on Networkers-online.com.
SDN is an Iteration that will Lead Innovations
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 …
The post SDN is an Iteration that will Lead Innovations appeared first on Networkers-online.com.
Related posts:
The Ongoing Internet Core Routing Race
BGP Default-Originate insights
Software-Defined Networks .. A Primer
Software-Defined Networks .. A Primer
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 …
The post Software-Defined Networks .. A Primer appeared first on Networkers-online.com.
Related posts:
Making sense of Broadband networks – Part 1
Out of Band Management Networks – Console Servers
Making Sense of Broadband networks: PPPoE Explained
How to become a Network Engineer?
If you aspire to become a network engineer, this post is going to guide you in making up your mind. Read through. From the outside, the whole information technology profession can seem mysterious. Mentioning IT summons various images ranging from artificially lit cubicle farms to young professionals roller skating through well decorated lounge spaces that …Troubleshoot#2: Core Dumps for Network Engineers
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 …
The post Troubleshoot#2: Core Dumps for Network Engineers appeared first on Networkers-online.com.