Hi, I'm running some scalability tests for OSPFv3 using Bird in docker containers. I'm getting some error messages in the logs if I run too many instances. 2017-04-20 21:59:57 <ERR> ospf1: Socket error on ln971_if1: Invalid argument I have 1000 nodes connected linearly (each node connects to two neighbors except the two end nodes that connect to only one neighbor). I'm running Bird 1.6.2 with a kernel version 4.9.0. Is this a memory limitation? Kernel bug? I'll attach the first few lines of the log file.