Capturing server output with redirection

[Jim Mozley <jim.mozley --at-- exponential-e.com>]

Hi All,

I want to capture server output to see jitter while the server is
running as a daemon. I use:

/usr/local/bin/iperf -s -D -u -i 10 >> /data/iperf/udp_server.log 2>&1

It seems to work if I run the server interactively but not with the -D 
option. Any ideas as to why this is?

I'm using iperf 1.7 on FreeBSD 4.10.

Thanks,

Jim