Access switches are connected to core switch as layer2. All SVI are configured in 6509.  ... View more

Dear Diana,                 Thanks for your response, how to understand difference in reference time from below output. I haven't configured any prefer in my configuration. Before applying prefer command, need to decide which server is providing accurate time which is every closet to reference time    Cisco# sh ntp associations     address         ref clock       st   when   poll reach  delay  offset   disp +~xx.250.113.149  xx.12.1.16       2     92    128   377 68.171   7.514  5.891 ~xx.99.5.19    xx.99.20.200     3    115    128     1  1.753   6.745 187.55 *~xx.168.44.25  xx.71.80.83      1     22    128   377  0.971   7.150  3.891 ~xx.99.5.10     10.9.xx.200     3     78    128     1  1.819   6.730 187.57 * sys.peer, # selected, + candidate, - outlyer, x falseticker, ~ configured       cisco#sh ntp status Clock is synchronized, stratum 2, reference is xx.168.44.25 nominal freq is 250.0000 Hz, actual freq is 249.9972 Hz, precision is 2**22 ntp uptime is 622204100 (1/100 of seconds), resolution is 4016 reference time is DF1D601A.368FEB28 (00:05:14.213 AEST Wed Aug 15 2018) clock offset is 7.1501 msec, root delay is 0.97 msec root dispersion is 15.50 msec, peer dispersion is 3.89 msec loopfilter state is 'CTRL' (Normal Controlled Loop), drift is 0.000011070 s/s system poll interval is 128, last update was 429 sec ago. ... View more

Dear Diana,                 Thanks for your response, how to understand difference in reference time from below output. I haven't configured any prefer in my configuration. Before applying prefer command, need to decide which server is providing accurate time which is every closet to reference time    cisco#sh ntp associations     address         ref clock       st   when   poll reach  delay  offset   disp +~xx.250.113.149  xx.12.1.16       2     92    128   377 68.171   7.514  5.891 ~xx.99.5.19    xx.99.20.200     3    115    128     1  1.753   6.745 187.55 *~xx.168.44.25  xx.71.80.83      1     22    128   377  0.971   7.150  3.891 ~xx.99.5.10     10.9.xx.200     3     78    128     1  1.819   6.730 187.57 * sys.peer, # selected, + candidate, - outlyer, x falseticker, ~ configured       cisco#sh ntp status Clock is synchronized, stratum 2, reference is xx.168.44.25 nominal freq is 250.0000 Hz, actual freq is 249.9972 Hz, precision is 2**22 ntp uptime is 622204100 (1/100 of seconds), resolution is 4016 reference time is DF1D601A.368FEB28 (00:05:14.213 AEST Wed Aug 15 2018) clock offset is 7.1501 msec, root delay is 0.97 msec root dispersion is 15.50 msec, peer dispersion is 3.89 msec loopfilter state is 'CTRL' (Normal Controlled Loop), drift is 0.000011070 s/s system poll interval is 128, last update was 429 sec ago. ... View more

Hi,     Can you share network diagram , stating how the connectivity is made ?? . what is your requirement .    HTH Sandy ... View more

Share me your ASA device configuration , Suspecting NATing issue for user LAN subnet     HTH Sandy ... View more