User's Manual

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ASSA ABLOY Hospitality
66 1001 001-7
without any successful TCP connection with the Visionline server, the encoder
will start sending service discovery requests.
15. If a Visionline server is on the same subnet, or if another encoder with a valid
TCP connection to the server is on the subnet, they will send a reply to the
querying unit, letting it know the IP address and TCP port of the Visionline
server. The encoder then tries TCP connection to that IP.
15 b. New functionality, RFID encoder version 2.0.0 and later: From the payload
supplied in the reply (the reply is sent with IP destination address
255.255.255.255, IP broadcast), the querying unit can determine if its own IP
address properties are correct with respect to network class, default encoder IP
and subnet mask. If required, it will self-assign a new IP address within the
subnet specified in the reply, and then send gratuitous ARP to ensure that no
other host has got the same IP. Then it goes on and tries TCP connection to the
received server IP address.
16. New functionality, RFID encoder version 2.0.0 and later: Prior to sending the
service discovery request, the encoder tries to contact a DNS server (Domain
Name System), with a request for resolving the most recently used server host
name. If that name is unknown to the DNS, the encoder tries to resolve the
factory default server host name. If any of the two names renders a successful
DNS reply, the encoder uses the IP address received from the DNS server, and
tries TCP connections to that address. If the factory default name is unknown
too, or if a DNS server is not available at all, the encoder sends a service
discovery request.
Note: 14/14 b, (15/15b) and 16 will go on in a round robin way until the encoder
has reached the server.