scp dropping connections

[Sad Clouds <cryintothebluesky%googlemail.com@localhost>]

I've just upgraded my sparc64 machine to latest NetBSD-7 and unable to
scp large files to this machine, as ssh keeps dropping connections after
some time.

src.tar
9%  262MB   1.2MB/s   1.3MB/s   36:01 ETA
Connection to ultra10 closed by remote host. lost connection

I see the following in the logs, but not sure if this is related:

sshd: bl_init: connect failed for `/var/run/blsock' (No such file or
directory)

ultra10# ls -l /var/run
total 148
-rw-r--r--  1 root  wheel         4 Apr  7 14:11 cron.pid
drwxr-xr-x  2 dbus  dbus        512 Apr  7 14:11 dbus
-rw-r--r--  1 root  wheel     21811 Apr  7 14:09 dev.cdb
-rw-r--r--  1 root  wheel     19036 Apr  7 14:10 dmesg.boot
-rw-r--r--  1 root  wheel         4 Apr  7 14:11 inetd.pid
srw-rw-rw-  1 root  wheel         0 Apr  7 14:09 log
drwxrwx---  2 root  operator    512 Apr  7 14:09 lvm
-rw-r--r--  1 root  wheel         3 Apr  7 14:11 ntpd.pid
-rw-r--r--  1 root  wheel      5316 Apr  7 14:11 rc.log
-rw-r--r--  1 root  wheel         4 Apr  7 14:11 rpc.lockd.pid
-rw-r--r--  1 root  wheel         4 Apr  7 14:11 rpc.statd.pid
-rw-r--r--  1 root  wheel         4 Apr  7 14:10 rpcbind.pid
srwxrwxrwx  1 root  wheel         0 Apr  7 14:10 rpcbind.sock
-rw-r--r--  1 root  wheel         4 Apr  7 14:11 sshd.pid
-rw-r--r--  1 root  wheel         4 Apr  7 14:09 syslogd.pid
-rw-r--r--  1 root  wheel         0 Apr  7 14:09 syslogd.sockets
-rw-rw-r--  1 root  utmp        520 Apr  7 14:11 utmp
-rw-rw-r--  1 root  utmp       3120 Apr  7 14:11 utmpx

Doe anyone have any idea what may be causing it?