Configuring Virtual Port Channels

Configuring a Hybrid vPC Peer Switch Topology

This example shows how to configure a pure vPC peer switch topology:

switch# configure terminal

Enter configuration commands, one per line. End with CNTL/Z. switch(config)# vpc domain 5 switch(config-vpc-domain)# peer-switch

2010 Apr 28 14:44:44 switch %STP-2-VPC_PEERSWITCH_CONFIG_ENABLED: vPC peer-switch configuration is enabled. Please make sure to configure spanning tree "bridge" priority as

per recommended guidelines to make vPC peer-switch operational. switch(config-vpc-domain)# exit

switch(config)# spanning-tree vlan 1 priority 8192 switch(config)# show spanning-tree summary Switch is in rapid-pvst mode

Root bridge for: VLAN0001-VLAN0050, VLAN0100-VLAN0149, VLAN0200-VLAN0249

VLAN0300-VLAN0349, VLAN0400-VLAN0599, VLAN0900-VLAN0999

Port Type Default

 

is disable

Edge Port [PortFast] BPDU Guard Default

is disabled

Edge Port [PortFast] BPDU Filter Default

is disabled

Bridge Assurance

 

is enabled

Loopguard Default

 

is disabled

Pathcost method used

 

is short

vPC peer-switch

 

is enabled (operational)

Name

Blocking Listening Learning Forwarding STP Active

---------------------- -------- --------- -------- ---------- ----------

VLAN0001

0

0

0

16

16

VLAN0002

0

0

0

16

16

switch(config)# copy running-config startup-config

 

 

switch(config)#

 

 

 

 

 

Configuring a Hybrid vPC Peer Switch Topology

You can configure a hybrid vPC and non-vPC peer switch topology by using the spanning-tree pseudo-information command to change the designated bridge ID so that it meets the STP VLAN-based load-balancing criteria and then change the root bridge ID priority to a value that is better than the best bridge priority. You then enable the peer switch. For more information, see the command reference for your device.

Note If you previously configured global spanning tree parameters and you subsequently configure spanning tree pseudo information parameters, be aware that the pseudo information parameters take precedence over the global parameters.

Before You Begin

Ensure that you have enabled the vPC feature.

Procedure

 

Command or Action

Step 1

switch# configure terminal

Step 2

switch(config)# spanning-tree

 

pseudo-information

Purpose

Enters global configuration mode.

Configures the spanning tree pseudo information.

Note This configuration takes precedence over any global spanning tree configurations.

 

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Cisco Systems N5KC5596TFA Configuring a Hybrid vPC Peer Switch Topology, Switchconfig# spanning-tree, Pseudo-information

N5KC5596TFA specifications

The Cisco Systems N5KC5596TFA is a high-performance data center switch designed specifically for modern architectures requiring low-latency, high-bandwidth connectivity. As part of the Nexus 5000 series, the N5KC5596TFA addresses the needs of virtualized environments, cloud computing, and highly dynamic workloads, making it an essential choice for enterprises and service providers.

One of the standout features of the N5KC5596TFA is its impressive port density. The switch offers 48 10 Gigabit Ethernet (10GbE) ports and 4 40 Gigabit Ethernet (40GbE) uplinks, providing flexibility to connect a variety of devices and ensuring high throughput across the network. This port configuration is ideal for connecting multiple servers and storage devices, making it perfect for environments with significant data traffic.

The switch supports a range of advanced technologies such as Virtual Extensible LAN (VXLAN) for improving scalability and multi-tenancy in data center networks. VXLAN encapsulates Layer 2 Ethernet frames within Layer 4 UDP packets, allowing for a larger address space and effective overlay networking, which is crucial for cloud deployments.

Another notable aspect of the N5KC5596TFA is its support for Data Center Bridging (DCB), which enhances the reliability and performance of Ethernet networks. DCB features like Priority Flow Control (PFC) and Enhanced Transmission Selection (ETS) help to minimize data loss and ensure Quality of Service (QoS) for various types of traffic, including storage and regular data, which is critical in a converged infrastructure.

Security is also a priority with the N5KC5596TFA, as it comes equipped with features such as Access Control Lists (ACLs) and port security, helping to safeguard the network from unauthorized access and potential threats.

In terms of management, the switch offers integration with Cisco's Data Center Network Manager (DCNM), providing tools for monitoring, management, and automation, which simplifies operational tasks. Additionally, it supports Cisco's Application Centric Infrastructure (ACI), enabling a more comprehensive and application-focused approach to networking.

Overall, the Cisco Systems N5KC5596TFA is engineered for organizations looking to build robust, highly efficient, and secure data center environments. Its combination of high density, versatile connectivity options, and advanced networking technologies makes it a powerful solution for meeting the demands of today’s enterprise workloads.