One of the the concepts that comes up occasionally is that of precedence. For example, one might consider the following routing table entries.
ip route 0.0.0.0 0.0.0.0 1.1.1.1 //default route ip route 192.168.0.0 255.255.0.0 1.1.1.2 //supernet/cidr route ip route 192.168.1.0 255.255.255.0 1.1.1.3 //network route ip route 192.168.1.0 255.255.255.128 1.1.1.4 //subnet route ip route 192.168.1.20 255.255.255.255 1.1.1.5 //host route
Questions often arise around which path a packet would take when it matches more than one entry. For example, a packet may have a destination address of 192.168.1.20. In this case it matches every single route entry.
The logic is actually simple, even straightforward. A packet will follow the most specific route entry that it matches. So a packet destined to 192.168.1.20 would be routed to a router at 1.1.1.5. If the destination happened to be 192.168.1.21, it would be routed over to 1.1.1.4.
“How should I get started with Network Automation?” I am often asked this question by network engineers looking to build new programming skills. If you are brand new to writing Python scripts and are looking for an easy on-ramp to the network automation superhighway, I’d suggest starting with Jinja2 – the de-facto python template engine. Template building […]
The post Python and Jinja2 Tutorial appeared first on Packet Pushers Podcast and was written by Jeremy Schulman.
As enterprises move from experimentation to full-fledged deployments of Big Data, supporting networks need to have the capabilities to support increased bandwidth. Our CEO, Rich Napolitano spoke with CRN’s Meghan Ottolini on this very subject recently. Rich explains how Plexxi’s architecture is designed to scale out to accommodate the next era of technology applications. See below for video footage; it’s definitely worth a look before you head out for your weekend.
Please find a few of our top picks for our favorite news articles of the week. Enjoy!
Nashua Telegraph: Plexxi likes the Nashua network
By David Brooks
There are plenty of reasons to locate a tech startup in one place rather than another. For networking firm Plexxi, part of Nashua’s appeal is institutional memory. “There’s definitely a talent base up here, from the days of Wang, DataGeneral and Digital. That’s a very complex, system-oriented world, ” said Rich Napolitano, who has been CEO since November, and whose first job out of college was at Digital Equipment Corp. in almost the same building where Plexxi now resides.
New York Times: HP Targets Cisco and Facebook With New Line of Open-Source Networking Gear
By Quentin Hardy
Hewlett-Packard said on Thursday that Continue reading
Coffee, doughnuts and networking. A perfect combination.
The post Network Break 28 appeared first on Packet Pushers Podcast and was written by Greg Ferro.
CCDE is the de facto expert level, vendor neutral, and infrastructure network design certification in the industry. I have been helping to CCDE community for a while through my packet pushers articles and podcasts. I started couple months before to write about network design and CCDE related articles on my blog http://orhanergun.net as well. […]
The post CCDE and CCAr Certificates – FAQ appeared first on Packet Pushers Podcast and was written by Orhan Ergun.