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

[Phil Bedard]

NTP "broadcast" sends the messages using multicast, to 224.0.1.1.  See
RFC5905.  

Phil 

On 7/2/13 6:09 AM, "Victor Sudakov" <vas at mpeks.tomsk.su> 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:sudakov at sibptus.tomsk.ru
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