![]() ![]() The other vPC peer is configured with a slightly higher Spanning Tree priority, such as 4096, which allows it to take over the role of root bridge within the Spanning Tree if the vPC peer acting as the root bridge fails. Normally, one vPC peer is configured as the root bridge of the Spanning Tree by setting its Spanning Tree priority to a low value, such as 0. In these environments, the Nexus switches also typically act as root bridges from a Spanning Tree Protocol perspective. Both switches are configured with multiple VLANs and are responsible for routing inter-VLAN east-west traffic as well as north-south traffic. In many environments, a pair of Nexus switches in a vPC domain are aggregation or core switches acting as the boundary between Layer 2 switched Ethernet domains and Layer 3 routed domains. This section describes the vPC Peer Switch enhancement, which is enabled with the peer-switch vPC domain configuration command. The procedure covered in this document is applicable to all vPC-capable Cisco Nexus data center switches. Understanding the purpose of each enhancement, the change in behavior that the enhancement introduces, and the failure scenarios that the enhancement solves can help you understand why and when an enhancement should be configured within a vPC domain to help best satisfy business needs and requirements. Since the inception of Cisco NX-OS on Cisco Nexus data center switches, the Virtual Port Channel (vPC) feature has received numerous enhancements that improve the reliability of vPC-connected devices during failure scenarios and optimize forwarding behavior of both vPC peer switches. If your network is live, ensure that you understand the potential impact of any command. All of the devices used in this document started with a cleared (default) configuration. The information in this document was created from the devices in a specific lab environment. ![]() Design and Configuration Guide: Best Practices for Virtual Port Channels (vPC) on Cisco Nexus 7000 Series Switches.Cisco Nexus 7000 Series NX-OS Interfaces Configuration Guide 7.x.Cisco Nexus 7000 Series NX-OS Interfaces Configuration Guide 8.x.Cisco Nexus 9000 Series NX-OS Interfaces Configuration Guide, Release 7.x.Cisco Nexus 9000 Series NX-OS Interfaces Configuration Guide, Release 9.2(x).Cisco Nexus 9000 Series NX-OS Interfaces Configuration Guide, Release 9.3(x).Cisco Nexus 9000 Series NX-OS Interfaces Configuration Guide, Release 10.1(x).Cisco Nexus 9000 Series NX-OS Interfaces Configuration Guide, Release 10.2(x).Cisco Nexus 9000 Series NX-OS Interfaces Configuration Guide, Release 10.3(x).For more information about this feature, refer to one of these applicable documents: Prerequisites RequirementsĬisco recommends that you understand basic information surrounding the use case, configuration, and implementation of Virtual Port Channel (vPC). This document describes common Virtual Port Channel (vPC) enhancements configured on Cisco Nexus switches in a vPC domain. ![]()
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