What are switch and router + switch?

[Update: May 23, 2019]

Information regarding [Switch] and [Router + Switch] for virtual network devices provided on SAKURA Cloud

Overview

[Switch] and [Router + Switch] are virtual switches and routers that operate in the virtual network of SAKURA Cloud. Similar to devices such as physical switches and routers, they include a function for mutual L2 connection of constructed virtual servers and virtual appliances. Additionally, [Router + Switch] with a router function includes a function for routing (L3 swtich) of internet lines and local lines.

[Switch] is for private network that cannot be connected directly from the Internet, and [Router + Switch] is for global network connected directly to the Internet.

We will provide overview of each function below.

Switch

This switch is for a local network environment using a private IP address. This switch is ideal for mutual connection of devices and interfaces which do not require exposure to the global IP address environment; for example, connection for administrative NIC used for SSH connection, database servers, and NFS appliances . Furthermore, the switch is created and used for an internal network at VPC router , and for L2 connection between zones at Brige connection for connection of subordinate devices.

Note

Virtual Private Cloud (VPC) is a network for connecting a virtual network built on the cloud and a private network of the customer via a virtual private network (VPN). VPC also makes it possible to use the resources on the cloud as if they were part of facilities in the private network.

Router + switch

When connecting the server to the Internet, you can select from connection to a shared segment which has one global IP address assigned and possesses a maximum bandwidth of 100Mbps, or connection to a router + switch which has multiple global IP addresses assigned in blocks. When connecting to router + switch, in addition to being able to select a connection bandwidth of 100Mbps or higher (maximum of 5,000Mbps), you can also use an even wider range of functions such as IPv6 address assignment function and Static route function.

Differences between [Switch] and [Router + Switch]

[Switch] is for L2 connection of private networks. [Router + Switch] is a switch with a router function and multiple IP addresses. A summary is shown in the following table.

Name Switch Router + switch
Roles L2 switch used within LAN L3 switch where Internet line and global IP are bundled
Application For local network For Internet connection
Option setting function No setting items :ref:Static route function <router-switch-static-route> ( Next hop can be set)
:ref:DNS reverse lookup settings for the assigned IP address block <reverse-dns>
:ref:Assignment of IPv6 address <ipv6>
Configuration example

Selling prices

Please refer to the service site for selling prices.

Usage procedures

For information on creation methods, option settings, etc., please refer to Creation/deletion of switch and router + switch.

Cautions

Switch

  • In order for a server with only a local IP address to perform Internet communication, a separate VPC router is required.

Router + switch

  • When you apply for / 25, / 24 of IP address, please refer to Change of application method separately.
  • Of the IP addresses to be added, one is used as a network address, one as a broadcast address, and three as gateway addresses (one IP address of the gateway address and two IP addresses internally for redundant configuration). Therefore, the number of IP addresses that can be assigned to a server is “the number of additional IP addresses subtracting 5”.
  • As for the IP addresses added by static route, all IP addresses are available for the user. However, when routing on the server, there are cases in which the number of IP addresses that can be assigned to a server is less than the number of added IP addresses depending on the network configuration. For example, when one IP address is used for the network address and one IP address is used for the broadcast address.
  • Global IP address is only available for paying in monthly fees. Hourly rate or daily rate is not set.
  • Even if you change a bandwidth, the global IP address will remain the same. You can continue using the same global IP address that you were using before the change of the bandwidth.
  • Even if you change a bandwidth, communication disconnection does not occur. But an instantaneous interruption may occur. Therefore, please perform bandwidth change during the time when the impact is expected to be minimum.

Common