Category Archives: NX-OS

Exploring vPCs and their verification

Virtual Port Channels (vPCs) allow you to ether channel or bundle multiple ports to the different devices.  Since the 7k/5k devices are looked at as one big virtual device, you can now use ether channel or load balancing and redundancy between multiple Nexus switches. vPC Peers are the bundled devices that act as one single… Read More »

Using ACLs in NX-OS

As usual, the same guidelines apply: You need at least one permit since there is always an implicit deny. The order matters. The global lists are first created then need to be assigned to a purpose. They will either recognize traffic and let it serve the purpose or prevent it from serving its purpose. One… Read More »

NX-OS – Layer 2 Redudancy

Layer 2 redundancy protocols exist to prevent loops from broadcasts and do so using BPDU packets.  These protocols include: STP – Spanning Tree Protocol – 802.1D RSTP – Rapid Spanning Tree Protocol – 802.1W MSTP – Multiple Spanning Tree Protocol  – 802.1S LAN Port Channeling – Also known as EtherChannels to bind multiple ports together.… Read More »

Using NX-OS for beginners

To show all commands in your buffer history: show cli history This command used to be show history on the old OS. Some enhanced editing shortcuts include: Ctrl+A – to get to the beginning of the line Ctrl+E – to get to the end of the line Ctrl+B – moves one character to the left… Read More »