[c-nsp] %NTP: Multicast peer 224.0.1.1 does not exist

[Victor Sudakov]

I have found something interesting though, in "debug NTP core".

NTP Core(INFO): transmit: 224.0.1.1 key 2 not found
NTP Core(INFO): transmit: 10.14.141.255 key 2 not found


gw2#sh run | i ntp au
ntp authentication-key 2 md5 1525190916270A2F70 7
ntp authentication-key 3 md5 10791B1C171A330054 7
gw2#

gw2(config)#interface GigabitEthernet0/2
gw2(config-if)#ntp broadcast key 3         
%NTP: Cannot reconfigure the broadcast peer.
gw2(config-if)#


What gives? And what's this "Cannot reconfigure the peer" stuff?

Thanks a lot for any input.

Victor Sudakov wrote:
> Colleagues,
> 
> A 7206VXR (NPE-G2) is not sending ntp broadcasts nor multicasts, and I
> even cannot recofigure ntp settings on an interface (see below). 
> 
> Any idea what the problem could be? 
> 
> "debug ntp packet|events" does not show anything of interest. tcpdump
> shows that the router is simply not sending any NTP packets out
> GigabitEthernet0/2. Google does not even know the phrase "Cannot
> reconfigure the multicast peer", nor does cisco.com/search
> 
> 
> gw2(config-if)#do sh run int GigabitEthernet0/2
> Building configuration...
> 
> Current configuration : 428 bytes
> !
> interface GigabitEthernet0/2
>  [dd]
>  ntp broadcast key 2 destination 10.14.141.255
>  ntp broadcast key 2
>  ntp multicast key 2 ttl 1
> end
> 
> gw2(config-if)#no  ntp multicast key 2 ttl 1
> %NTP: Multicast peer 224.0.1.1 does not exist
> gw2(config-if)#no ntp multicast
> %NTP: Multicast peer 224.0.1.1 does not exist
> gw2(config-if)#ntp multicast key 2 ttl 6
> %NTP: Cannot reconfigure the multicast peer.
> gw2(config-if)#ntp multicast ?
>   A.B.C.D     Multicast group IP address
>   X:X:X:X::X  Multicast group IPv6 address
>   client      Listen to NTP multicasts
>   key	      Configure multicast authentication key
>   ttl	      TTL of the multicast packet
>   version     Configure NTP version
>   <cr>
> 
> gw2(config-if)#ntp multicast 224.0.1.1 ?
>   key	   Configure multicast authentication key
>   ttl	   TTL of the multicast packet
>   version  Configure NTP version
>   <cr>
> 
> gw2(config-if)#ntp multicast 224.0.1.1 ttl 6
> %NTP: Cannot reconfigure the multicast peer.
> gw2(config-if)#
> 
> -- 
> Victor Sudakov,  VAS4-RIPE, VAS47-RIPN
> sip:sudakov at sibptus.tomsk.ru
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-- 
Victor Sudakov,  VAS4-RIPE, VAS47-RIPN
sip:sudakov at sibptus.tomsk.ru