What Is Vpc Peer Switch

Vpc peer switch.

What is vpc peer switch. A mix of vpc and non vpc links is called a hybrid setup. If the primary fails secondary vpc takes over as primary even after primary vpc comes back up. This feature eliminates the need to pin the stp root to the vpc primary switch and improves vpc convergence if the vpc primary switch fails.

The vpc peer switch is one of a pair of switches that are connected to the special portchannel known as the vpc peer link. In pure vpc environment like 2 1 topology peer switch should be configured this will allow for faster convergence of the stp topology when a failed n7k is restored rather than configuring spt root and secondary priorities on the n7k aggregation devices. This document discusses in detail the reason for the pseudo stp configurations and how they affect non vpc and vpc links.

Vpc also allows the creation of layer 2 portchannels that span two switches. The vpc peer link carries control traffic between two vpc switches and also multicast broadcast data traffic. For the realm of non vpc vlans the stp topology works in a traditional manner with the root bridge being whatever switch is set with spanning tree vlan x priority.

Vpc peer link. At this time being vpc is implemented on cisco nexus 9000 7000 5000 and 3000 series platforms with or without cisco nexus 2000 series fabric extenders. Also bear in mind there is no role preemption in vpc.

Vpc belongs to multichassis etherchannel mcec family of technology. Vpc peer switch allows a pair of nx os device to be viewed as a single stp point. Vpc is similar to virtual switch system vss on the catalyst 6500s.

This means that both switches are going to send bpdu s with the virtual id as the root of the topology and their respective physical bridge id s as the candidate. The vpc peer link is the link used to synchronize states between the vpc peer devices. The third device can be a switch a server or any other networking device that supports ieee 802 3ad portchannels.