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--- controls:protocols:bacnet:qna [2020/10/01 21:36] – old revision restored (2020/09/29 21:16) 144.76.29.148
+++ controls:protocols:bacnet:qna [2020/10/04 00:48] – old revision restored (2020/09/30 16:24) 92.220.10.100
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-====== Questions / Answers ======
+====== Questions and Answers ======
 Here are a few interesting Q&A gathered from the BACnet mailing list.
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 ===== Broadcasts =====
+??? Can devices ignore Who-Is broadcasts?
+When sending a Who-Is broadcast, I have some devices that won't answer I-Am like I would expect them to.
+- Christian Fortin
+!!!
+(…) broadcasts can and will get lost, especially when there are a lot of them. If you broadcast a Who-Is with no parameters, ALL devices have to answer, so you will get a flurry of I-Am, some of which may get dropped.
+- John Hartman
+!!! See the related [[http://blog.hvac.io/2015/01/11/network-discovery-with-devices-ignoring-whois/|blog post]]
 ??? Should a BACnet/IP router answer to global broadcast messages?
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 - Coleman
+===== max_info_frames =====
-==== max_info_frames ====
 ??? Can adjusting the max_info_frames increase overall network speed?