Comprehensive Analysis of vro switch differences

The difference between vro and vswitch is particularly prominent in the layer-3 technology. In contrast, vswitch has the following advantages: the transmission bandwidth between subnets can be allocated freely and information resources can be reasonably configured, flexible Connections between vswitches.

Layer-3 vro switch differences

Before the emergence of layer-3 switching technology, there was almost no need to distinguish between vro and vswitches. They were completely the same: the routing function was being used by vrouters. However, currently, layer-3 vswitches can fully perform most of the functions of traditional routers. As a device for network interconnection, layer-3 switches have the following features:
◆ Forward the business flow based on the third-tier address;
◆ Complete switching functions;
◆ Special services such as packet filtering or authentication can be completed;
◆ Route processing is executed or not performed.

Vswitches have the following advantages:

◆ Transmission bandwidth between subnets can be arbitrarily allocated: each interface of a traditional router connects to a subnet, and the transmission rate of the subnet through the router is limited by the bandwidth of the interface. The layer-3 switch is different. It can define multiple ports as a virtual network and use a virtual network composed of multiple ports as a virtual network interface, the information in the virtual network can be sent to the layer-3 Switch through the port that forms the virtual network. The number of ports can be specified arbitrarily, so there is no limit on the inter-subnet transmission bandwidth.

◆ Reasonable configuration of Information Resources: As there is no difference between the resource rate in the subnet access and the resource rate in the global network access, it is of little significance to set a separate server in the subnet. Setting a server group in the global network not only saves money, more reasonable configuration of information resources.

◆ Cost reduction: Generally, vswitches are designed to form subnets, and vrouters are used to interconnect subnets. Currently, a three-tier switch is used for network design. It can be divided into any virtual subnet, and inter-subnet communication can be completed through the three-tier routing function of the switch, which saves the cost of a router.

◆ Flexible connections between vswitches: As vswitches, no loops are allowed between them. As vrouters, there are multiple channels to improve reliability and balance load. Layer-3 switches use the Spanning Tree Algorithm to block the loop port. However, when selecting a route, the blocked path is still used as an optional path for route selection.

Router switch difference conclusion
To sum up, the switch is generally used for the LAN-WAN connection, the switch belongs to the bridge, is the data link layer equipment, some switches can also realize the third layer of the exchange. A vro is used for WAN-WAN connections. It can resolve forwarding groups between different networks and act on the network layer. They only accept the input group from one line and then forward it to another line. These two lines may belong to different networks and adopt different protocols. In comparison, vro features more powerful than vswitches, but the speed is relatively slow and expensive. layer-3 vswitches have both the ability to forward packets at the wire speed of vswitches and the good control function of vrouters, therefore, it can be broadcast applications.