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Showing posts from November, 2016

First look of Open NX-OS

Cisco NX-OS is the network operating system that is used in Cisco Nexus switches. These Nexus switches from Cisco are built for DATA-CENTERS. In this post I will give you a brief idea regarding the NX-OS operating system.  NX-OS has been evolved from SAN-OS which was originally developed for MDS switches by Cisco only. These MDS switches are used for storage network.

Cisco NX-OS is purely based on Micro-kernel Linux where as traditional Cisco IOS is also based on Linux but with Monolithic kernel. I will tell you the difference between these two types of kernel below in this post because it is the key difference between NX-OS and IOS.
 Monolithic Kernel :
Monolithic kernel is a single large process running entirely in a single address space or memory space. It is a single static binary file. All kernel services exists and executes in the kernel address space. If one process having some problem then it will effect all other processes and may interrupt the complete kernel flow. As an ex…