I am currently in a situation where I have three ISR G1 routers running IOS 15.1(4)M7 and I am completely unable to sync them to any NTP source. Be it public NTP servers or setting up one of the routers as an NTP server itself.
Here is the configuration from the NTP server that I set up on the 1841
*May 17 17:54:36.459: NTP Core (INFO): synchronized to 10.0.0.1, stratum 7 *May 17 17:55:20.732: %SYS-6-CLOCKUPDATE: System clock has been updated from 17:54:36 UTC Sat May 17 2014 to 17:55:20 UTC Sat May 17 2014, configured from NTP by 10.0.0.1. *May 17 17:55:20.732: NTP Core (NOTICE): time reset 44.272715 s *May 17 17:55:38.732: NTP Core (INFO): peer 10.0.0.1 event 'event_reach' (0x84) status 'unreach, conf, 7 events, event_reach' (0x8074) *May 17 17:55:38.732: NTP Core (INFO): synchronized to 10.0.0.1, stratum 7 *May 17 17:55:45.734: %SYS-6-CLOCKUPDATE: System clock has been updated from 17:55:40 UTC Sat May 17 2014 to 17:55:45 UTC Sat May 17 2014, configured from NTP by 10.0.0.1. *May 17 17:55:45.734: NTP Core (NOTICE): time reset 5.002567 s
NTP-CLIENT#sh ntp status Clock is unsynchronized, stratum 16, reference is 10.0.0.1 nominal freq is 250.0000 Hz, actual freq is 249.9949 Hz, precision is 2**15 reference time is 00000000.00000000 (00:00:00.000 UTC Mon Jan 1 1900) clock offset is 11255.8437 msec, root delay is 0.00 msec root dispersion is 1.58 msec, peer dispersion is 7937.51 msec loopfilter state is 'SPIK' (Spike), drift is 0.000020457 s/s system poll interval is 64, never updated.
This shows is telling me something about the server being unreachable, but... I don't know why it isn't working. Same config in IOS 12.4 works perfectly. And, also, I tried with an 881 router running 15.3(3)M1 and it synched to public NTP servers just fine using the "ntp server" command. Also, it needs to be said that the ISR G1 routers also show the same messages in the log when trying to connect to public NTP servers.
I do think I am doing something wrong here, but I just can't find anything on it anywhere. I have looked through the documentation for the IOS version and configured NTP as shown there and I also looked for any caveats that may be open on the platform/IOS, but found nothing relating to my issue.
So, is there anyone out there that can spot my error here? It is driving me mad. I would also like to note that these are not in production - they are in my lab rack at home. So, there is a great amount of flexibility when it comes to troubleshooting the issue.
I just think that if it were a bug in the IOS it would have been noticed by someone other than myself. It's like it's some sort of niche feature I am trying to get to work - it's NTP.
In Catalyst switch IOS version 15.0(2)SE2, it will take 10 minutes (instead of 5) for NTP to get synch. It wasn't mentioned in the Bug Toolkit (BTK). Not all bugs are reported in BTK especially if the bugs are deemed to be "internal".
I agree with you, Leo. It does point to an issue. But I just find it strange that I can't find anyone on Google who mentions the same issue. I would think that someone out there would be wanting to comment on it somewhere - kind of like I do right now.
I will see if I can get a hold of the newer IOS and update this thread as to whether it helps with my NTP issue or not.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.