[ntp:questions] multicast configuration help

Collins ccw.in.nc at gmail.com
Fri Nov 17 19:37:27 UTC 2006


Hello All-

 I'm trying to help some coworkers troubleshoot the following problem.

We have a NTP server and a client.  They work toghther fine in UNICAST
mode.  When
we try to run te client in multicast mode it works after ann intial
echange(volley).  One of the things we are trying to do is get the
client to listen only.  When we add novolley to the clinet ntp.conf
file
it does not form any assocations.

Can any one direct me as to how to get a client to listen to a
multicast group address without sending any traffic?  I have attached
the ntp.conf files for working and nono-working scenarios

  Thanks in advance

    Collins

client: (Does not work)
broadcastclient 224.0.1.1 novolley
restrict 224.0.1.1 mask 255.255.255.255 notrust nomodify notrap
disable auth
driftfile /etc/ntp/drift
broadcastdelay  0.008
logfile /var/ntp.log

client:(works)
multicastclient          224.0.1.1
restrict 224.0.1.1 mask 255.255.255.255 notrust nomodify notrap
disable auth
driftfile /etc/ntp/drift
broadcastdelay  0.008
logfile /var/ntp.log

server:
restrict 124.101.91.221 nomodify notrap noquery
server 127.127.1.0  #local clock
broadcast 224.0.1.1 ttl 5 #key 1 ttl 5
disable auth
driftfile /etc/ntp/drift
broadcastdelay  0.008
authenticate no
logfile /var/ntp.log
keys            /etc/ntp/keys

This is the output when it does not work.
# ntpq -np
input_handler: fd=4 length 12 from 7f000001 127.0.0.1
receive from 127.0.0.1
in process_control()
opcode 1, found command handler
read_status: ID 0
sendpkt(fd=4 127.0.0.1, 127.0.0.1, ttl=-6, 12)
No association ID's returned




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