Environment
eDirectory 8.8.7
Situation
messages log reports "ndsd [2020] do not support transport type 8"
Resolution
Transport type 8 is a UDP packet.
The error "do not support transport type 8" means UDP traffic is filtered or disabled. A UDP request to port 524 was not fulfilled by ndsd because the UDP traffic on port 524 is blocked. UDP port 524 packets can be timesync or an application making a UDP request instead of TCP request. Normal eDirectory synchronization uses TCP.
Additional Information
Take a packet trace to gather more information on the UDP request to port 524
Example of capturing UDP traffic on port 524 from any interface and write the trace to /tmp/pkt-524-udp.cap
tcpdump
-s0 -i any udp port 524
-w /tmp/pkt-524-udp.cap