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#Practice for best mac address software
#Practice for best mac address series

Hot Standby Router Protocol (HSRP), Virtual Router Redundancy Protocol (VRRP), Link Aggregation Control Protocol (LACP) are also included in this base license.

#Practice for best mac address software

VPC feature is included in the base NX-OS software license. This is when the nexus 7k came on the market way back in 2008 VPC technology is supported since NX-OS 4.1.3. NX-OS Version and Licence requirement for VPC Withing a vPC domain, user can connect access devices in multiple ways: vPC-attached connections leveraging active/active behavior with port-channel, active/standby connectivity using spanning-tree, single attachment without spanning-tree running on the access device. Spanning-Tree is used as a fail safe mechanism and does not dictate L2 path for vPC-attached devices. Any potential control plane issues stay local to the peer device and does not propagate or impact the other peer device.įrom a Spanning-Tree standpoint, vPC eliminates STP blocked ports and uses all available uplink bandwidth.

Each peer device in the vPC domain runs its own control plane, and both devices work independently.

In case a peer device fails, the other peer device will absorb all the traffic with minimal convergence time impact. Each peer device processes half of the traffic coming from the access layer.

vPC domain is composed of two peer devices.

vPC uses all port-channel member links available so that in case an individual link fails, hashing algorithm will redirect all flows to the remaining links.

Scales available Layer 2 bandwidth, increasing bi sectional bandwidth.

Enables seamless virtual machine mobility and server high-availability clusters.

Build highly resilient and robust Layer 2 network.

VPC also leverages native split horizon/loop management provided by port-channeling technology: a packet entering a port-channel cannot immediately exit that same port-channel.īy using vPC, users get the immediate operational and architectural advantages:

Offers dual active/active default gateways for servers.

Provides fast convergence upon link or device failure.

Allows dual-homed servers to operate in active-active mode.

Eliminates Spanning Tree Protocol (STP) blocked ports.

VPC provides the following technical benefits: The third device can be a switch, server, or any other networking device that supports link aggregation technology.

#Practice for best mac address series

vPC belongs to Multichassis EtherChannel family of technology.Ī virtual port channel (vPC) allows links that are physically connected to two different Cisco Nexus 5,7,9K Series devices to appear as a single port channel to a third device. VPC is a virtualization technology that presents both Cisco Nexus 5,7,9K Series paired devices as a unique Layer 2 logical node to access layer devices or endpoints. This might become a long post so I may split it into two if the needs must. In this post we are going to discuss the design and best practices of VPC.