[c-nsp] NTP message sent to, from interface 'NULL' (

Victor Sudakov vas at mpeks.tomsk.su
Tue Jul 2 06:09:17 EDT 2013


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, from interface 'NULL' (
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
 ip pim sparse-dense-mode
 duplex auto
 speed auto
 ntp broadcast destination
 ntp broadcast

Victor Sudakov,  VAS4-RIPE, VAS47-RIPN
sip:sudakov at sibptus.tomsk.ru

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