Benefits of vpc cisco

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Cisco v irtual P ort C hannel vPC is a virtualization technology, launched inwhich allows links that are physically connected to two different Cisco Nexus Series devices to appear as a single port channel to a third endpoint. The endpoint can be a switchserverrouter or any other device such as Firewall or Load Balancers that support the link aggregation technology EtherChannel.

The diagram below clearly illustrates the differences in both logical and physical topology between a non-vPC deployment and a vPC deployment :. Finally, a Quiz is included at the last section and we are waiting for your comments and answers!

The Nexus, and series switches take port-channel functionality to the next level by enabling links connected to different devices to aggregate into a singlelogical link.

The peer switches run a control protocol that synchronizes the state of the port channel and maintains it. The following general guidelines and recommendations should be taken into account when deploying vPC technology at a Cisco Nexus Data Center :. This is the adjacent device, which is connected via the vPC Peer-link. A vPC setup consists of two Nexus devices in a pair.

Nexus vPC - How vPC works

The vPC peer-link is the most important connectivity element in the vPC setup. This link is used to synchronize the state between vPC peer devices via vPC control packets which creates the illusion of a single control plane.

In addition the vPC peer-link provides the necessary transport for multicastbroadcastunknown unicast traffic and for the traffic of orphaned ports.

The Peer Keepalive Link provides a Layer 3 communications path that is used as a secondary test in order to determine whether the remote peer is operating properly. In particular, it helps the vPC switch to determine whether the peer link itself has failed or whether the vPC peer is down. The default timers are an interval of 1 second with a timeout of 5 seconds. This is the common domain configured across two vPC peer devices and this value identifies the vPC.

A vPC domain id per device is permitted. This is the interface that is a member of one of the vPCs configured on the vPC peers. This protocol is used for stateful synchronization and configuration. It utilizes the peer link and does not require any configuration by the administrators. The Cisco Fabric Services over Ethernet protocol is used to perform compatibility checks in order to validate the compatibility of vPC member ports to form the channel, to synchronize the IGMP snooping status, to monitor the status of the vPC member ports, and to synchronize the Address Resolution Protocol ARP table.

Configuring Cisco Security with Amazon VPC Ingress Routing

V irtual S witching S ystem VSS is a virtualization technology that pools multiple Cisco Catalyst Switches into one virtual switchincreasing operational efficiency, boosting nonstop communications, and scaling system bandwidth capacity. Both technologies are similar from the perspective of the downstream switch but there are differences, mainly in that the control plane works on the upstream devices.Anubhav Swami. It allows users to specify routes for traffic flowing between a VPC and the internet or from a VPN connection, such as a private datacenter.

Amazon VPC Ingress Routing is a service that helps customers simplify the integration of network and security appliances within their network topology. This makes it easier for customers to deploy production-grade applications with the networking and security services they require within their Amazon VPC. This includes services such as the following:.

This is a big win for Cisco customers deploying our security products in AWS, and we are pleased to have been an early adopter and Integration Partner with AWS on this launch. A single firewall instance can protect multiple subnets; however, a separate instance is needed per VPC.

Cisco Nexus 5000 Series Switches

Below are some details on the testing we performed as well as sample use cases and configuration guidance. The route table for the Internet Gateway igw-rt has a specific route for the Inside subnet which directs inbound traffic to the Cisco Firewall for inspection.

Prior to this enhancement, the users had to NAT egress traffic on the firewall to bring back the reply packet to the same virtual appliance. This new configuration eliminates the need for an ENI on the firewall and removes the requirement to perform NAT on the firewall, thus improving performance.

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By utilizing the AWS NAT Gateway service, the number of protected subnets behind a single firewall can be scaled significantly beyond what was previously possible. In this example, the local and remote networks are routable; therefore, the NAT gateway can be eliminated, further improving efficiency and reducing cost. These integrations will make deploying L services in a hybrid cloud as well as Cisco Security at scale in AWS easier than ever.

Cisco Cloud ACI. Ok, nice add, so how about a white paper outlining deployment? Or Some training materials on how to use it? I believe you guys are still very behind. Amazon VPC was a real headache for me.The major benefits it brings are:. Configuration Relevant Terminology. However, most of vPC interface parameters for type 2 consistency check do not appear in sh vpc consistency-parameters interface port-channel command.

Both keepalive and peer-link are quite important for vPC system to work properly. Keepalive should be firstly established before procedures of Primary and Secondary role in vPC system can proceed. When only keepalive link is down, peer-link will carry keepalive heartbeats temporarily. Therefore, vPC almost reacts nothing to keepalive link failure.

benefits of vpc cisco

However, Cisco still recommends to fix this failure as soon as possible to avoid Split-Brain scenarios when both keepalive and peer-link are down. In summary, Cisco recommends spreading peer links and keepalive links to multiple ASICs or multiple modules and different cabling routes for keepalive and peer links to avoid a double failure.

Differences when enabling peer-switch applies only to vPC ports. Since NX-OS 4. Switch config spanning-tree pseudo-information Switch config-pseudo vlan 1 designated priority Switch config-pseudo vlan 2 designated priority Switch config-pseudo vlan 1 root priority Switch config-pseudo vlan 2 root priority Switch config vpc domain 1 Switch config-vpc-domain peer-switch.

Bridge Assurance is a STP extension that prevents L2 loop in scenarios of unidirectional link event caused by physical cable failure or adjacent switch control plane failure but data plane still in forwarding state. It is not hardware off-loaded down to line card like BFD for instance.

benefits of vpc cisco

Default hello time is 2 seconds. Layer 2 Loop avoidance logics implemented directly in hardware while STP relies on control plane to do that, thus it provides faster convergence upon link or device failure. Most components or concepts of vPC technology are entailed in below picture. This is for instance the case with orphan ports.

Shutdown and no shutdown vPC peer-link. Be careful that this operation is disruptive as operational secondary peer device will shut its vPC member ports once peer-link is down. CFS is enabled by default when vPC feature is turned on.

CFS messages are encapsulated in standard Ethernet frames that are delivered between peers exclusively on the peer-link. Since NX-OS version 5. Type 1 global configuration consistency check : if inconsistent, all vPC member ports only on secondary peer device are set to down state.

Type 1 vPC interface parameters consistency check :only the inconsistent vPC member ports on secondary peer device are set to down state. When type 2 global configuration or vPC interface parameters are inconsistent, all vPC member ports remain in up state and vPC systems trigger to protective actions.

Switch config spanning-tree pseudo-information Switch config-pseudo vlan 1 designated priority Switch config-pseudo vlan 2 designated priority Switch config-pseudo vlan 1 root priority Switch config-pseudo vlan 2 root priority Switch config vpc domain 1 Switch config-vpc-domain peer-switch Bridge Assurance Bridge Assurance is a STP extension that prevents L2 loop in scenarios of unidirectional link event caused by physical cable failure or adjacent switch control plane failure but data plane still in forwarding state.

If a neighbor port stops receiving BPDUs, the port is moved into the blocking state. [archivio]

If the primary peer device fails over, the secondary peer device needs to start sending BPDUs. As the primary peer device was also the Spanning Tree Protocol root, the secondary also has to take over the STP role as root. This can occur in specific conditions of intense CPU utilization. To avoid this unreasonable blocking of uplink ports on access device, Bridge Assurance should be disabled on vPC member ports.

Configuration Tips: Bridge Assurance is enabled by default on vPC peer-link at the creation of the link. Bridge assurance on the peer-link is fine so there is no need to disable it.A Port-Channel is a technology that provides a way to aggregate bond multiple interfaces together.

Traffic is then loadbalanced across each of the connections. Port-Channels provide 3 key benefits. Though Port-Channels are great, the problem is that all links within the "bundle" must be connected to the same switch. This results in a single control plane for both management and configuration purposes. Whereas with vPC each switch is managed and configured independently. It is important to remember that with vPC both switches are managed independently.

Figure 1 : vPC Components. Here lies the issue. When the vPC peer-link goes down only the vPC member ports are shut down, i. In order to ensure the orphan port is brought down correctly the interface command orphan port suspend is used. The vPC peer-link is the most important component within the vPC domain. Just as we mentioned, should a member port fail then the peer-link is used to send unicast traffic to the peer.

Figure 2 : PeerLink Scenario. Below shows the necessary configuration. This configuration is applied to both switches. However please ensure to amend the IP addresses accordingly. Additionally, please note that within this example the following port-channels will be used for the peer-link and keepalive.

What is Cisco vPC (Virtual Port Channel)?

The Port-Channel config is standard but we also include the command vpc This command is added to both Port-Channels on both switches. The first place to check to see an overview of the vPC setup and how it is running is via the command show vpc brief. To show the consistency across vPC peers the show vpc consistency-parameter … is used. Finally to check the status of the vPC keepalive the command show vpc peer-keepalive is used.

In fact this is a good question, considering the fact you wouldnt want to burn a SFP port just for the peer keepalive.

Transit Virtual Private Cloud Deployment Guide using Cisco CSR 1000v for Amazon Web Services

Rick Donato PacketFlow. Close You've successfully subscribed to PacketFlow. Close Success! Your account is fully activated, you now have access to all content.Request a Quote.

How many times have you heard service providers saying that they are a perfect fit for the cloud business because they are already providing the network? What do they mean? How does your business benefit?

Is network a critical component of your application or is it just a redundant item on the list? Let me answer these queries by explaining the three most important benefits of Virtual Private Clouds.

VPCs are similar to public clouds yet somewhat different — they can be defined as a private cloud infrastructure provided within a public cloud. The resources are owned and operated by the cloud provider.

Coming down to benefits, the three most essential benefits of a VPC are:. Take a look at the figures below, do you spot the difference? Yes, in the figure on the left, the traffic that is destined for the cloud is being sent via the company data center or is being looped through the company data center.

This leads to wastage of bandwidth, router, switch and firewall capacity. Your company will end up paying twice for bandwidth. Not to mention network sizing — the very basis of a cloud is access to on demand resources. In this case your network must always be sized for peak traffic. How is that efficient? The figure on the right hand side shows a Virtual Private Cloud set up.

With the second set up, the bandwidth required to reach the cloud will be billed for on-demand and users will be able to take the shortest and a cost effective route to the application.

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Congestion in the Internet can disrupt or slow down your application traffic. Even if you have sized your network for peak times, inbound congestion could hamper application performance and make applications run slow. The point of congestion is shown in the above figure. Thus, traffic with a high priority can be marked and delivered accordingly.AWS also provides different options for connecting these networks to each other and to non-AWS infrastructure, such as on-premises data centres, remote headquarters, or other offices.

However, there is some level of complexity while adding a new spoke as this solution uses a VPN Gateway as opposed to the Transit Gateway. The Transit Gateway solution has a transit gateway that acts as a hub for providing spoke-to-spoke VPC connectivity.

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The transit VPC is another core component that acts as the central hub for traffic flowing from any spoke VPC to a remote network.

Solution Helper Lambda : This component is triggered when you deploy the cloudformation template. The Transit Gateway solution is a managed service. That is, high availability and monitoring is built-in, and you can track the solution using metrics like CloudWatch. By using the Transit Gateway solution, you can simplify your network architecture, thereby reducing the operational cost. Ensure that you have IAM permission to manage the cloudformation service.

Launch the template in the appropriate region where you are located. Click Next. The required throughput for the CSR v instance. This determines the instance type to be launched. The default value is 2 x Mbps. The key pair is created in your preferred region at the time when you created the AWS account. Enable this field to enable termination protection for the CSR v instances.

This prevents accidental CSR v termination. Cisco recommends you enable this field for production deployments. By default, this field is set to Yes. The text string that you need to use as a prefix when Amazon S3 objects are created.This chapter provides information about configuration synchronization operations in Virtual Port Channel vPC topologies.

For example, vPC topologies require identical configurations on peer switches. As a result, you, as the network administrator, must repeat configurations on both peer switches. This process, which can cause errors due to misconfigurations or omissions, can result in additional service disruptions because of mismatched configurations. Configuration synchronization eliminates these problems by allowing you to configure one switch and automatically synchronize the configuration on the peer switch.

benefits of vpc cisco

In a vPC topology, an EtherChannel can be formed across two physical switches and vPCs can be connected to any networking device or end host. Because each Cisco Nexus Series switch forms an EtherChannel bundle to a downstream device, each Cisco Nexus Series switch must have some matching parameters.

If they do not match, depending on whether it is a global for example, spanning-tree port modea port-level for example, speed, duplex, or channel-group typeor even a port-channel interface, the vPC can go into a suspended state or a VLAN can go into a blocking state on both peer switches. As a result, you must ensure that the configuration from one switch is copied identically to the peer switch.

Configuration synchronization allows you to synchronize the configuration between a pair of switches in a network. You use a switch profile to create a configuration file that you can apply locally and you use it to synchronized the configuration to its peer. Configuration synchronization and vPCs are two independent features and configuration synchronization does not eliminate vPC consistency checks. The checks will continue. If there is a configuration mismatch, the vPC can still go into a suspended state.

One important benefit of configuration synchronization is that it eliminates the need to manually repeat the same configuration on both switches. Configuration synchronization benefits are as follows:.

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The requirements for configuration synchronization are as follows:. The guidelines for configuration synchronization are as follows:. Configuration synchronization has the following configuration limitations:.

Configuration synchronization requires two Cisco Nexus Series peer switches that are configured in a vPC topology.


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