RuggedCom RX1100, RX1000 manual Configuring Goose Tunnels, IEC61850 Goose Fundamentals

Chapter 20 – Configuring GOOSE Tunnels

Chapter 20 – Configuring GOOSE Tunnels

Introduction

This chapter familiarizes the user with:

∙Configuring GOOSE Tunnels

∙Viewing GOOSE Tunnel status and statistics

∙Tracing GOOSE activity

IEC61850 GOOSE Fundamentals

IEC61850 is an international standard for substation automation. It is a part of the International Electrotechnical Commission’s (IEC) Technical Committee 57 (TC57) architecture for electric power systems.

One feature of IEC61850 is the fast transfer of events. Transfers of Generic Substation Events (GSEs) are accomplished through the GOOSE (Generic Object Oriented Substation Event) protocol.

IEC61850 uses Layer 2 multicast frames to distribute its messages and hence, is incapable of operating outside of a switched Ethernet Network. The GOOSE tunnel feature provides a capability to bridge GOOSE frames over a WAN.

GOOSE tunnels provides you with the following features:

∙GOOSE traffic is bridged over the WAN via UDP packets.

∙One GOOSE traffic source can be mapped to multiple remote router Ethernet interfaces in mesh fashion.

∙To reduce bandwidth consumption, GOOSE daemons may be located at each of the “legs” and at the center of a star network. The centrally located daemon will accept GOOSE packets and re-distribute them.

∙Statistics reports availability of remote GOOSE daemons, packet counts and Round Trip Time (RTT) for each remote daemon.

∙When Virtual Router Redundancy Protocol (VRRP) is employed, GOOSE transport is improved by sending redundant GOOSE packets from each VRRP gateway.

Layer 2 Tunnel Daemon Details

The GOOSE protocol is supported by the Layer 2 Tunnel Daemon. The daemon listens to configured Ethernet interfaces and to the network itself upon a configurable UDP port.

The Media Access Control (MAC) destination address of frames received from Ethernet is inspected in order to determine which GOOSE group they are in. The frames are then encapsulated in network headers and forwarded (with MAC source and destination addresses intact) to the network as GOOSE packets.

IEC61850 recommends that the MAC destination address should be in the range 01:0c:cd:01:00:00 to 01:0c:cd:01:01:ff.

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