I have a problem in NTP server below our current senior
We have configure Router 2800 as a NTP server to provide time for CUCM
When we configure before it was working fine but suddenly we found there is some time deference on all telephones connected to CUCM
Configuration for Router (note we have configured firewall to allow our router for communicate with NTP)but still our router not able to communicate with outside NTP
ntp source FastEthernet0/0
ntp master
ntp server 122.226.192.4
ntp server 120.88.47.10
ntp server 207.46.197.32
ntp server 203.158.118.2
ntp server 221.139.48.11
router# sh ntp sta
Clock is synchronized, stratum 8, reference is 127.127.7.1
nominal freq is 250.0000 Hz, actual freq is 250.0000 Hz, precision is 2**18
reference time is CF7A6BE9.95FDA0A4 (09:32:09.585 +3GMT Thu Apr 22 2010)
clock offset is 0.0000 msec, root delay is 0.00 msec
root dispersion is 0.02 msec, peer dispersion is 0.02 msec
router#sh ntp associations
address ref clock st when poll reach delay offset disp
~122.226.192.4 0.0.0.0 16 - 256 0 0.0 0.00 16000.
~120.88.47.10 0.0.0.0 16 - 256 0 0.0 0.00 16000.
~207.46.197.32 0.0.0.0 16 - 256 0 0.0 0.00 16000.
*~127.127.7.1 127.127.7.1 7 6 64 377 0.0 0.00 0.0
~203.158.118.2 0.0.0.0 16 - 256 0 0.0 0.00 16000.
~221.139.48.11 0.0.0.0 16 - 256 0 0.0 0.00 16000.
* master (synced), # master (unsynced), + selected, - candidate, ~ configured
From CUCM our router is accessible
