which vpn topology is also known as a hub-and-spoke configuration
Using a VPN topology is a good way to make sure that everyone has a strong connection to the Internet.
However, you might be wondering which VPN topology is right for your business.
This article discusses a few different topologies, including point-to-point VPN, DMVPN, and full mesh VPN.
Using DMVPN to centralize network communications is a great way to simplify WAN network topology. It allows organizations to centralize shared services, security devices, and a variety of other functions.
It is ideal for organizations with remote sites. In fact, a DMVPN topology is often used for connecting branch locations via the Internet.
Generally, DMVPN works by creating a multipoint GRE tunnel between the hub and spokes.
Multipoint GRE tunnels are easier to configure than a single point-to-point GRE tunnel. In addition, DMVPN can be used with dynamic public IP addresses.
This is a good thing because it reduces configuration overhead.
A spoke is a remote site with a router configured to connect to the hub of a company’s VPN service. The spoke is a Next Hop Client and a P2P GRE tunnel is used in Phase 1.
A hub and spoke configuration is an NBMA network.
It uses firewall concentrators and VPN routers. It supports IPv4 and IPv6 multicast and unicast transport, and a number of advanced QoS mechanisms. It also supports dynamic NAT devices.
The hub router is a Next Hop Server. It functions as an NHRP server, but it does not require any manual configuration.
It performs the NHRP Redirect message, which is similar to an ICMP redirect message. It also maintains a database of NHC public IP addresses.
Using this database, the hub can perform a search to find the public IP address of another branch router. It then uses this information to modify the CEF table.
The hub router also functions as an NHRP server.
It uses the client/server model to register spokes and create a database of public IP addresses.
This database is then used to map spokes’ real IP addresses to logical VPN IP addresses.
Using the hub’s public IP address, a spoke can perform a search of the database for other spokes. It can also build dynamic tunnels between spokes.
The Hub’s NHRP server can do a number of other things, including generating a summary route or a default route.
It can also reload spoke router interfaces to make changes to the IP address mapping. The Hub also implements a timer to clear out unused entries.
Using a point-to-point VPN topology, two endpoints can directly communicate.
This type of VPN topology is best suited for minimal inter-site traffic. Point-to-point VPN topologies can be configured with IPsec/GRE or Regular IPsec technology.
If a point-to-point topology is configured with Regular IPsec technology, a hub and spoke configuration can be used.
A hub and spoke VPN topology can be implemented in a variety of ways.
For example, a hub and spoke topology can be a tiered network consisting of two hubs. Or, an organization may have a hub-and-spoke topology, and it needs to add spokes to this network.
In addition, a hub-and-spoke topology can be implemented with a full mesh topology, in which all spokes are connected to the hub.
Hub-and-spoke topologies are best suited for organizations that have multiple remote branches that communicate with the central VPN router.
Hub-and-spoke topologies can also be used in Mobility Conductor deployments.
The configuration can include a separate secure tunnel logical interface for spoke sites.
Point-to-point topologies can also be configured with a full mesh topology.
In this type of VPN topology, the spokes and hubs are connected to each other, and there are no pre-made routes.
When a spoke wants to send traffic to a hub, the spoke sends an NHRP resolution request to the hub router.
The hub router then responds with a public IP address and a next-hop IP address, allowing the spoke to send traffic to the hub.
Hub-and-spoke VPN topologies can be configured with multiple failover hubs. This feature is available only if the hub device is in the hub and spoke topology.
When configured, hubs can also act as IPsec aggregators.
This feature is also available when the hub device is configured as the primary hub.
Depending on the type of VPN topology, the Create VPN wizard will open. The wizard will create multiple device types and VPN topologies.
The Create VPN wizard displays a device selection page that differs depending on the type of VPN topology.
This page also displays a confirmation dialog box.
The Device Selection page displays the VPN roles and devices in the VPN topology.
It also displays the Available Protected Networks and Interface Roles lists.
Full mesh VPN
Using a mesh VPN topology allows you to increase your security and scalability.
Mesh VPNs are a way of sending traffic between nodes without overburdening the central server. Using a mesh VPN can be a complicated process, though.
As your network grows, you will need to make some changes to your security policy.
A mesh VPN is different from a traditional hub-and-spoke configuration in that nodes are responsible for their own routing.
This allows each node to determine the shortest path to send traffic to its peers. It also allows you to add new nodes without overloading the network. However, mesh VPNs can also cause network traffic congestion.
For mesh VPNs to work properly, there are some best practices to follow.
In particular, you should store your security policies in a central location. This will make it easier for administrators to update your security policies to reflect the evolution of your network.
There are two primary types of mesh VPNs. Full mesh and partial mesh.
The full mesh topology includes all nodes, while the partial mesh topology only includes a few devices.
The full mesh topology includes a peer VPN interface and a hub VPN interface. It supports IPsec/GRE technology, while point-to-point topologies only support Regular IPsec.
This type of topology requires less work but does not have the same level of redundancy as full mesh topology.
The full mesh VPN topology also supports a GET VPN protocol.
This type of VPN allows all devices to communicate with each other by using a unique IPsec tunnel.
A GET VPN is a group trust model.
The group trust model is a VPN technology that encrypts traffic using a group of key servers. These servers are responsible for sending encryption keys to each node.
Full mesh topologies are a great option for complicated networks. However, as your site grows, you will need to make more changes to your security policy.
As you add new nodes, you may run out of VPN interfaces.
The best practice is to configure the shortest path for each node to send traffic to its peers. This minimizes network traffic congestion and reduces latency.
Creating a VPN topology
Creating a hub-and-spoke VPN topology is an easy way to ensure that all devices in your network can communicate through a unique IPsec tunnel.
However, to achieve the full benefits of this topology, you will need to understand the different policies that you can configure.
These policies vary depending on which IPsec technology you choose.
In addition to changing the policies, you may also need to edit the VPN interfaces that you use. For example, changing the DES encryption algorithm may increase the security of your network.
The first step in creating a hub-and-spoke VPN is to assign an IPsec technology. You can choose Regular IPsec, Easy VPN, or IPsec/GRE.
All of these technologies are available for use with Security Manager, but only Hub and Spoke VPN topology supports Easy VPN. The hub of the hub-and-spoke VPN topology acts as an IPsec Aggregator.
It must define a name and VRF parameters for the VRF. The spokes may be Cisco IOS routers or Catalyst VPN service modules.
After you assign IPsec technology to your VPN topology, you can begin creating your topology.
The Create VPN wizard can help you create a hub-and-spoke topology by providing you with a set of default policies and policy configurations.
If you want to modify the policies, you can use the Policy view. It displays all the shared policies that you can choose from. You can also edit individual policies to change their assignment to your topology.
The next step in creating a hub-and-spoke topology is to assign roles to the devices that you want to include in the topology.
For example, you can create a site-to-site topology and assign a network and an interface role to each device.
Then, you can select the required device from the Site-to-Site VPN list. You will also need to provide the required permissions to each device in the topology.
You can also add new devices to the topology, but you will need to have permission for each device.
You can also clone a device in a hub-and-spoke topology.
This allows you to add a new spoke to the VPN topology. However, you can’t remove the hub from the topology. You can maintain device locking, though.
Using a VPN topology is a good way to make sure that everyone has a strong connection to the Internet. However, you might be wondering which VPN topology is right for your business. This article discusses a few different topologies, including point-to-point VPN, DMVPN, and full mesh VPN. DMVPN Using DMVPN to centralize network communications…