mDNS example record in OPC 10000-12 | OPC UA Standard | Forum

mDNS example record in OPC 10000-12

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09/13/2022 - 05:46

I am attempting to implement mDNS capability according to the specification, but am confused by the example SRV record in OPC 10000-12 which shows:

_opcua-tcp._tcp.example.com. 86400 IN SRV 0 5 4840 uaserver.example.com.

My understanding is that all mDNS names should end in .local, so shouldn't this be

_opcua-tcp._tcp.local. 86400 IN SRV 0 5 4840 uaserver.example.com.

Thanks in advance

Randy Armstrong

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09/15/2022 - 14:12

The .local TLD is used when a standard DNS is not configured for the host.

If a host has a standard DNS record it should use its canonical DNS name when announcing itself via mDNS.

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