NTP "broadcast" sends the messages using multicast, to 224.0.1.1. See RFC5905.
Phil On 7/2/13 6:09 AM, "Victor Sudakov" <[email protected]> wrote: >Colleagues, > >Why is a CISCO3945 router sending multicast NTP packets with ttl=31 (!) >while I have never configured it to do so? "debug ntp packets" reveals: > >NTP message sent to 224.0.1.1, from interface 'NULL' (0.0.0.0). >NTP: ntpio_send_ipv4 called with bcast address and NULL interface > >In fact, it is configured to send NTP broadcast messages on some >Ethernet interfaces, but not multicast. What could be wrong? > >! >interface GigabitEthernet0/0 > description Orlovka > ip address 10.14.128.225 255.255.255.224 > ip pim sparse-dense-mode > duplex auto > speed auto > ntp broadcast destination 10.14.128.255 > ntp broadcast >end > > >-- >Victor Sudakov, VAS4-RIPE, VAS47-RIPN >sip:[email protected] >_______________________________________________ >cisco-nsp mailing list [email protected] >https://puck.nether.net/mailman/listinfo/cisco-nsp >archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
