User's Manual

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ASSA ABLOY Hospitality
66 3081 004-23
Appendix F: Gateway boot-up
15. If a Visionline server is on the same subnet, or if another gateway 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 gateway then tries TCP connection to that IP.
15 b. New functionality, Zigbee gateway version 2.3.0 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 gateway 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, Zigbee gateway version 2.3.0 and later: Prior to sending the
service discovery request, the gateway 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 gateway tries to resolve
the factory default Server Host Name. If any of the two names renders a
successful DNS reply, the gateway 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 gateway sends a
service discovery request.
Note: 14, 14 b, (15/15b) and 16 will go on in a round robin way until the gateway
has reached the server.