SNTP client, unable to synchronize time, error: server-ip-mismatch

RouterOS General
1

hi all,
I have been struggling with this issue since I set up my router.
SNTP client cannot synchronize time, error server-ip-mismatch.
so far I have tried:

  1. disable in dhcp client “use peer ntp option”
  2. tried to get synchronized with IP cloud
  3. ping ntp servers, got ping
  4. revised firewall settings, to make sure UDP 123 port is not blocking
  5. installed (removed later) sntp server package …
    from somewhere I found, that issue can cause, if there is two subnets (I have two 192.168.88… and 192.168.90…).
    currently using MikroTik RouterOS 6.38.7 version, hardware platform is RB2011UiAS-2hnd
    Please help ! :frowning:
2

I did try SNTP, did not get it to work.
So I added the NTP pacage and use full NTP instead of Simple NTP

https://wiki.mikrotik.com/wiki/Manual:System/Packages

3

This error is on router? Or You are using router as NTP server and this error is on clients?

4

Are you sure that ISP is not doing something with NTP packets? It is very popular complaint at support - that NTP does not work, but almost always simply ISP is, for example, dropping such packets.

5

This error on router , I am not running any NTP servers

6

yes, because I had RB951G-2HND, on same ISP (ATT) works fine..

7

Check port 123 udp is not closed by your isp. I have the same problem last week from ISP.

Sent from my C6833 using Tapatalk

8

hi, how I can check?.
I did some research, (even though I dont beleive, that problem on ISP side) they said use telnet to ISP to specific port, but seems it does not work well. Unable to test even regular SMTP , POP ports.
Any other solution?

9

It seems like a problem with the routeros. Because I found the same problem again

Sent from my C6833 using Tapatalk

10

I am still struggling,
no solution?
I need to sync my router time, any way. Please help us.

11

Did you try the NTP package?

12

not yet, what is the NTP package, to create NTP server?

13

Download extra packages fro your hardware here:
https://mikrotik.com/download
it does contain full NTP support.
PS It may be for the smal home router that there are no NTP package. For the 750Gv3 there is one.

14

I tried that one too. Even though I dont see anywhere IP mismatch message, but issue is still there.
I dont understand one thing, is this issue is so hard, that no one can figure it out, or i posted in wrong place? :open_mouth:

15

It may be a bug, some you have done wrong…
Try to upgrade you box to latest version.
Do a full reset to default config.
Configure minimum to get it to work.
Install NTP package (if it exists for this model)
Try to test it then.

16

I had this problem too. In my case I’ve just added more servers and one of them finally synchronized.
I’ve noticed that the ones added with ip don’t always work, but between all of them you can get one to sync.

/system ntp client
set enabled=yes primary-ntp=98.175.203.200 secondary-ntp=66.219.116.140
server-dns-names=“roc.nipne.ro,ntp.zyx.ro”

At first I also thought it was the isp blocking, turns out something isn’t quite right with mikrotik or with some ntp servers.

17

thanks let me try that one

18

Same problem ..

19

I did have another strange problem with NTP that is still not fixed.
If my ISP gives me a non working NTP using DHCP, it prevents NTP from working, even if I add valid NTP servers.
http://forum.mikrotik.com/t/ntp-client-bug/104619/1

20

filed tech support ticket, almost 2 weeks we are exchanging with emails, no results so far.
Last try was to eliminate problem causing devices, but after that, error causing IP/device changed to another device.
As my understanding it nothing to do with device config…