Hi, I'm currently trying to configure a RedHat 9 client for using NTP in multicast mode. Reading the rare documentations available, I have set the "multicastclient" option in /etc/ntp.conf. Here is the error I obtain : [root@xxxxxxxxx rc5.d]# /usr/sbin/ntpd -c /etc/ntp.conf -l /var/tmp/ntp.log [root@xxxxxxxxx rc5.d]# cat /var/tmp/ntp.log 12 May 03:40:13 ntpd[26154]: logging to file /var/tmp/ntp.log 12 May 03:40:13 ntpd[26154]: ntpd 4.1.1c-rc1@xxxxx Thu Feb 13 12:17:19 EST 2003 (1) 12 May 03:40:13 ntpd[26154]: signal_no_reset: signal 13 had flags 4000000 12 May 03:40:13 ntpd[26154]: precision = 29 usec 12 May 03:40:13 ntpd[26154]: kernel time discipline status 0040 12 May 03:40:13 ntpd[26154]: bind() fd 9, family 2, port 123, addr 224.0.1.1, in _classd=1 flags=0 fails: Address already in use 12 May 03:40:13 ntpd[26154]: ...multicast address 224.0.1.1 using wildcard socket 12 May 03:40:13 ntpd[26154]: frequency initialized 0.000 from /etc/ntp/drift I didn't find any explanation to the "bind() fd 9, family 2, port 123, addr 224.0.1.1, in _classd=1 flags=0 fails: Address already in use" message. Note : This is not a network configuration problem, our SUNS and VMS work fine. Thanks for your help, Jacques BEJA..