[c-nsp] NTP message sent to 224.0.1.1, from interface 'NULL' (0.0.0.0).

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


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:sudakov at sibptus.tomsk.ru


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