14 Application Examples
14.1 Configuring VLANs in a Digital Substation Network
Consider the situation given below.
Figure 82: Topology to be configured in a VLAN environment
Consider the following assumptions:
1. Merging Unit sends GOOSE and Sampled Values with VLAN tag information,
and receives PTP messages with VLAN information;
2. PTP Grandmaster Clock sends VLAN information on its PTP packets;
3. IED receiving GOOSE and Sampled Values can receive both messages with
VLAN tag;
4. IED receiving only GOOSE messages is VLAN unaware, so GOOSE messages
should be delivered to this equipment without VLAN information;
5. All equipment management interfaces used is at the same port used for
other messages, and management communication (TCP/IP) is performed with
untagged frames;
6. IED Receiving only GOOSE and PTP Grandmaster Clock equipment can have
its operation crashed if Sampled Values traffic is injected on its Ethernet port. Other
equipment have processing capacity to process Sampled Values traffic, if they are
member of the Sampled Values VLAN;
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