Posts in 2015
-
Cisco Data Center: Fiber Channel and Cisco Storage Fundations
Wednesday, February 04, 2015 in SDN and Network Virtualization
Unified Fabricis a term for all of the equipment that makes LAN and SAN possible. There are two different networks (LAN as Front-end and SAN as Back-end) that we are trying to “converge”, and 10G is an enabler of that convergence. SAN (Storage Area …
-
NSX Components - The Basics
Friday, January 30, 2015 in SDN and Network Virtualization
TIP: If you are a Networking professional, the odds are you don’t know much about Web services, and RESTful API everyone is mentioning all the time is your confusion point. REST has gained widespread acceptance across the Web as a simpler alternative …
-
Python Programming for Cisco Nexus (NX-OS) Series
Sunday, January 25, 2015 in Virtualization and Private Cloud
Before I get into the Python for NX-OS, let me explain a few concepts that I’ve seen Network Engineers have been struggling with. DevOps DevOps is a software development method that combines the Software Development (Apps) and the IT Operations …
Posts in 2014
-
How VXLANs Work
Tuesday, December 02, 2014 in SDN and Network Virtualization
TIP: An Ethernet Ethertype of 0x0800 indicates that the payload is an IP. TIP: The maximum transmission unit (MTU) requirement for VXLAN is minimum of 1,600 bytes to support IPv4 and IPv6 guest traffic. TIP: The VLAN tag in the layer 2 Ethernet frame …
-
VMware NSX Fundamentals
Monday, December 01, 2014 in SDN and Network Virtualization
In July 2012 VMware acquired Nicira (Nicira was founded by Martin Casado of Stanford University and it had a product called NVP - Network Virtualization Platform), and that’s basically how VMware started the NSX Venture and got into the SDN. NSX …
-
How vSphere sees VLANs
Monday, November 24, 2014 in Virtualization and Private Cloud
-Virtual Switch (vSwitch): Manages virtual machine and networking at the host level. There is NEVER a direct connection between two vSwitches, and the Spanning Tree is OFF. So EAST-WEST Traffic is NOT ALLOWED between the vSwitches, and the only way …
-
vSphere Networking for CCIEs
Monday, November 10, 2014 in Virtualization and Private Cloud
Before you even consider getting into the NSX, be sure you understand deeply the vSphere, vCenter and ESXi concepts, including the vSphere Networking (vSwitch and vDS). If this is not the case, I highly recommend you start with a vSphere-networking …
-
OpenStack and OpenDaylight for Network Professionals
Friday, July 11, 2014 in Virtualization and Private Cloud
Disclaimer: I wanted to name the post “OpenStack for dummies”, but I took a wild guess that CCIEs don’t really like to be called dummies, so I “tuned” the title a little bit. You’re welcome :) * OpenStack * Cisco …
-
Are Cisco Nexus 1000v, CSR 1000v and Vyatta the same thing?
Thursday, July 10, 2014 in SDN and Network Virtualization
Brief version: No, they are not. Long version: No, they are not. Nexus 1000v is used for L2 interconnection of the VMs. On the other side, Cisco Cloud Services Router (CSR) 1000v is, in my opinion, a direct competitor of Vyatta /vi:áta/ (acquired by …
-
Network Virtualization vs SDN
Thursday, July 10, 2014 in SDN and Network Virtualization
SDN (Software Defined Networking) and Network Virtualization, although often in the “same basket”, are two different concepts. Network Virtualization (NV) decouples and isolates “virtual” networks from the underlying physical …