Solved: Time on the Callmanager server 4.1.3

lkinchen · ‎02-05-2009

I have a problem on my callmanager server losing time. I can set the server to the correct time, then after a few days it'll be fast by 3 minutes then 5. how can I correct this?

Rob Huffman · ‎02-06-2009

Hi Latricia,

Good stuff!

Yes, the reference to 127.127.1.1 really tells the system to use the local/system clock instead of a true NTP reference. The internal Windows CCM clock will always lose time over time (sounds funny!) so this is why using NTP is always the recommended choice :)

Hope this helps!

Rob

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Jaime Valencia · ‎02-05-2009

easiest way is to configure an NTP for the network

HTH

java

if this helps, please rate

HTH

java

if this helps, please rate

Rob Huffman · ‎02-06-2009

Hi Latricia,

Just to add a note to the good tip from Java;

How To Configure Time Synchronization for Cisco CallManager and Cisco Unity

http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_tech_note09186a008009470f.shtml

Cisco IP Telephony Clock Synchronization: Best Practices

http://www.cisco.com/en/US/prod/collateral/voicesw/ps6788/vcallcon/ps556/prod_white_paper0900aecd8037fdb5.html

Hope this helps!

Rob

lkinchen · ‎02-06-2009

thanks for that information. that really help! this is what I found in the ntp file.

server 127.127.1.1

# Set Local Clock to Authoritive TimeSource

fudge 127.127.1.1 stratum 5

# Resets Stratum from default 3 to 5

does this mean it's authenticated with itself. and does the second line the reason it's 5 minutes fast.

Rob Huffman · ‎02-06-2009

Hi Latricia,

Good stuff!

Yes, the reference to 127.127.1.1 really tells the system to use the local/system clock instead of a true NTP reference. The internal Windows CCM clock will always lose time over time (sounds funny!) so this is why using NTP is always the recommended choice :)

Hope this helps!

Rob