Cisco Support Community
Community Member

Missing NTP commands

I am attempting to configure my 1605R to utilize NTP for it's system/hardware time. I have never configured NTP on such a low-end device. I have always forced syncronization using "ntp update-calendar", but this appears to be missing. I have the following NTP commands available:


cisco1605R(config)#ntp ?

access-group Control NTP access

authenticate Authenticate time sources

authentication-key Authentication key for trusted time sources

broadcastdelay Estimated round-trip delay

clock-period Length of hardware clock tick

master Act as NTP master clock

max-associations Set maximum number of associations

peer Configure NTP peer

server Configure NTP server

source Configure interface for source address

trusted-key Key numbers for trusted time sources


I have established the following configuration:

#> ntp server prefer ( - Palo Alto)

With the following snipping from my access control list:

#> permit udp any any eq ntp log

I cannot get my system clock to syncronize with the NTP server. The following is the result:


cisco1605R#show ntp status

Clock is unsynchronized, stratum 16, no reference clock

nominal freq is 252.0161 Hz, actual freq is 252.0161 Hz, precision is 2**7

reference time is 00000000.00000000 (18:00:00.000 cst Thu Dec 31 1899)

clock offset is 0.0000 msec, root delay is 0.00 msec

root dispersion is 0.00 msec, peer dispersion is 0.00 msec



cisco1605R#show ntp associations

address ref clock st when poll reach delay offset disp

~ 16 - 64 0 0.0 0.00 16000.

* master (synced), # master (unsynced), + selected, - candidate, ~ configured


What am I doing wrong?

Community Member

Re: Missing NTP commands

Are you sure you can get to Make sure your link is up and no firewall is blocking.

Community Member

Re: Missing NTP commands

Not sure if this help but, here's my 1601R config lines (I have SNTP support, but not full NTP support):

clock timezone EST -5

clock summer-time EDT recurring last Sun Apr 2:00 last Sun Oct 2:00

sntp server

Here's a SH SNTP, and the IOS version I'm running is c1600-ny-mz.120-9.bin...

rtrdt-go#sh sntp

SNTP server Stratum Version Last Receive 3 1 00:00:09 Synced

CreatePlease to create content