Network technology


IPv4 and IPv6 are used to connect networks and PCs to each other.

Both IPv4 (Internet Protocol Version 4) and IPv6 (Internet Protocol Version 6) are used for Internet communication.

Because most IPv4 addresses have already been distributed, it has become difficult to acquire new addresses. This is why plans are underway to transition to IPv6.

IPv6 multicasting

With IPv6 multicasting, you can use the IPv6 protocol to send data to multiple specified PCs.

IPv6 multicasting enables efficient delivery by making it possible for multiple PCs to receive the data sent in a single transmission from the sending side.

Yamaha routers offer the following IPv6 multicasting functions.

MLDv1/v2, MLD proxy


You can use VLANs to create virtual groups on a single physical network and configure multiple LANs.

  • VLAN tags
    • You can attach headers to packets that control the range within which communication can take place. These headers are referred to as tags.
  • LAN division
    • In a LAN interface that has a switching hub, you can use LAN division to assign a different network to each port and use the ports as multiple virtual LAN interfaces.
  • LAN1 port division
    • In a LAN interface that has a switching hub, you can use LAN1 port division to split ports into multiple groups and refuse communications from outside the groups. This enables you to secure communications with a WAN while preventing communications between LAN terminals. This increases each terminal's independence, improves resistance to viruses, and improves overall security within the LAN.

NAT (Network Address Translation)

You can use NAT to convert the address section of an IPv4 header. NAT is primarily used to convert a private address within a company or household into a global address that can be used to connect to the Internet.

  • Masquerade NAT
    • You can use masquerade NAT, which is an expansion of NAT, to share one global address between multiple PCs. To accomplish masquerade NAT, the router converts the UDP/TCP port number in addition to the address.

SNMP (Simple Network Management Protocol)

You can use SNMP to manage devices and monitor operational states over a network. There are manager and agent functions. The manager monitors the agent. Yamaha routers support agent functions.

UPnP (Universal Plug and Play)

UPnP can be used to transfer the information necessary for communication between a network device and a terminal. When NAT is used, the ports for each application must be opened and registered, but UPnP can be used to configure these settings automatically.


You can use the backup function with multiple lines to establish alternate routes for use when there is a problem with the main line.

  • VRRP ( Virtual Router Redundancy Protocol )
    • You can use VRRP to establish redundant default gateway devices. Even if there is a problem with the main gateway device, the router will automatically switch to a backup gateway device and continue communication.
  • Floating static routes
    • You can use floating static routes to assign preferences to dynamic route information and static route information when performing backup. If some type of problem prevents the acquisition of dynamic route information, the router will refer to the static route information and create an alternative path for communication.
  • Network backup
    • In network backup, the router regularly pings the opposing device to confirm reachability, and if reachability cannot be confirmed because of an error or some other problem, the router redirects communications through a separate preset route. This function eliminates the need for the exchange of dynamic route information and provides a backup structure with a light load.