ntp server for cucm installation vmware

[monasir]

Hi everyone,

I'm running into problems , i'm trying to install cucm v 9 in vmwar workstation.

When i've reached the ntp server part i specify a ntp server, for example one of my cisco routers.

But it's still keeping the message ntp server unreachable , after that if i skip i'm not able to continue.

"must specify one valid and reachable external ntp server cisco "
Is there a way to make this fix, i'v also tried to use a ntp server from the  ntp.pool.org site.
No succes,/

[Anas Abueideh]

Hi,

you need a reachable NTP server for the installation.

if you want to use ntp.pool.org, you need to use DNS to resolve the name to IP address

HTH

Anas

don't forget to rate the helpful posts

[ciscovoipsupport]

I faced the same issue.. but my envirnment was vsphere.. I just created another vm for NTP alone and it worked...

Another problem could be becuase of ethernet adapter bridging.. make sure VM has reachability to the NTP network...

[afsal abdul gafoor · Accepted solution]

If you configured ntp with a local cisco router, then make sure the ntp server is reachable from cucm.

This can be done in several ways.

one such make sure the port connecting from esxi is trunk,and the packets originating from the esxi should be tagged with the corresponding vlan.

Regards

Afsal Abdul Gafoor

[monasir]

Hi Afsal,

I've alreay did that.
I configured my 3550 switch with a trunk which goes to a 2801 router .
In both of my devices of configured ntp server.
I gave my pc static adress which is in the same subnet, so this should be fine right?
But still no succes, could you take a look at my configs, maybe that will help.

I appreciate all the help!

[afsal abdul gafoor]

Did you change the port from CUCM (ESXI) carry all vlans.?

Can you send me one screen shot of the network configuration of cucm server.

[Brandon Pierce]

If the NTP server on the router is reachable my only other suggestion is to ensure it is a something like stratum 4.  When you do a show ntp status, what does the router reply with?  It should be synchronized and have something like this:

Clock is synchronized, stratum 4, reference is x.x.x.x

nominal freq is 250.0000 Hz, actual freq is 249.9990 Hz, precision is 2**19

reference time is AFE2525E.70597B34 (00:10:22.438 PDT Mon Jul 5 1993)

clock offset is 7.33 msec, root delay is 133.36 msec

root dispersion is 126.28 msec, peer dispersion is 5.98 msec

Additionally, make sure your ethernet adapter is set to Flex or E1000 as I recall.

[monasir]

Thanks,

I made a mismatch in one of my routers, i had duplicate ip's.
Nowe the ntp server is reachable i can run my install fine.

All the other guys thanks for the help!