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Category Archives for "Networking"

Interoperability between Dell and Cisco: Rapid-PVST+

Today I am going to talk about the PVST+ as many of you already know. PVST+ is the advance version of PVST and stands for the Per VLAN spanning Tree Plus. As the name suggest you can have the you are creating STP for the VLANs. So if you have 3 VLANs in your network you have 3 different STP instances per VLAN in your LAN network.

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Here today I am taking an example where i am taking Cisco and Dell switches in a LAN network and we are going to check the interoperability between the Cisco and Dell. 

Below is the sample network topology showing the Cisco and Dell switches 
Fig 1.1- LAN network STP topology
So in the above mentioned topology, we have 2 Cisco 3550 switches and connected with the Dell Force10 S60 switch Continue reading

Weekend Reads 120117

There’s an “automation meteor” headed right at us, according to financial adviser and Reformed Broker blogger Josh Brown, who used this troubling “chart o’ the day” from Wharton to show just “how quickly things have changed” over the past decade. And how they’re going to keep on changing. —Shawn Langlois @ MarketWatchThere’s an “automation meteor” headed right at us, according to financial adviser and Reformed Broker blogger Josh Brown, who used this troubling “chart o’ the day” from Wharton to show just “how quickly things have changed” over the past decade. And how they’re going to keep on changing. —Shawn Langlois @ MarketWatch

Andrew Ng, formerly the head of AI for Chinese search giant Baidu and, before that, creator of Google’s deep-learning Brain project, knows as well as anyone that artificial intelligence is coming for plenty of jobs. And many of us don’t even know it. —Rachel Metz @ MIT Technology Review

Many historians believe that one of the main reasons why the U.S. won the Cold War was its decisive lead over the Soviet Union in computer and telecommunications technology, which, by the 1980s, made it virtually impossible for the Soviets to compete, either economically or militarily. Continue reading

Enterprise Network on GNS3 – Part 4 – Cisco ASAv-I

This is the fourth from the series of the articles that discuss configuration of the enterprise network. The article explains configuration of the device ASAv-I. The device is a Cisco Adaptive Security Virtual Appliance (ASAv) version 9.6(1) installed on qcow2 Qemu disk. The ASAv-I provides traffic filtering and inspection services for the campus network and Data Center (DC). It also connects the campus network and DC to the vIOS-EDGE-I edge router.

Picture 1 -  ASAv-I,  Campus, DC and  Edge Connection

Note: The recommended RAM size for ASAv instance is 2048 MB. In order to lower memory consumption,  GNS3 is configured to assign 1536 MB to the ASAv.

Note: The interface eth0 on the ASAv-I is referred as the interface Management0/0 in ASAv configuration. The interface eth0  is not connected as we use the inside interfaces for management instead. The first connected interface is then the interface eth1 that is referred as the interface GigabitEthernet0/0 in ASAv CLI. Similarly, the second connected interface eth2 is referred as the GigabitEthernet0/1 and so on.

Note: Here is the configuration file of vASA-I.

ASAv-I Configuration

Once we start ASAv, the Qemu window is launched. However we want to use GNS3 Continue reading

Does Juniper Need To Be Purchased?

You probably saw the news this week that Nokia was looking to purchase Juniper Networks. You also saw pretty quickly that the news was denied, emphatically. It was a curious few hours when the network world was buzzing about the potential to see Juniper snapped up into a somewhat larger organization. There was also talk of product overlap and other kinds of less exciting but very necessary discussions during mergers like this. Which leads me to a great thought exercise: Does Juniper Need To Be Purchased?

Sins of The Father

More than any other networking company I know of, Juniper has paid the price for trying to break out of their mold. When you think Juniper, most networking professionals will tell you about their core routing capabilities. They’ll tell you how Juniper has a great line of carrier and enterprise switches. And, if by some chance, you find yourself talking to a security person, you’ll probably hear a lot about the SRX Firewall line. Forward thinking people may even tell you about their automation ideas and their charge into the world of software defined things.

Would you hear about their groundbreaking work with Puppet from 2013? How about their wireless Continue reading

Worth Reading: Open Source Supply Chain

Diversity and inclusivity in the technology industry—and in open source communities more specifically—have received a lot of coverage, both on Opensource.com and elsewhere. One approach to the issue foregrounds arguments about concepts that are more abstract—like human decency, for example. But the “supply chain” metaphor works, too. And it can be an effective argument for championing greater inclusivity in our open organizations, especially when people dismiss arguments based on appeals to abstract concepts. —Ben Cotton @ Open Source

How Did NETCONF Start on Software Gone Wild

A long while ago Marcel Wiget sent me an interesting email along the lines “I think you should do a Software Gone Wild podcast with Phil Shafer, the granddaddy of NETCONF”

Not surprisingly, as we started discovering the history behind NETCONF we quickly figured out that all the API and automation hype being touted these days is nothing new – some engineers have been doing that stuff for almost 20 years.

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