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Summit X-Series, Problem with curent time


Hi, at all!

We have a problem with some switches x450 with the firmware 22.2.1.5 and higher. We configure the timezone with this syntax:

"configure timezone name MEZ 60 autodst name MESZ 60 begins every last sunday march ends every last sunday october"

But when I show the current time with "show switch", there is a difference about 20 or 30 minutes.

What's the problem and how can I solve it?

Thanks for all answers!

15 replies

Userlevel 2
Hi Carsten.

this is only the timezone and summertime configuration. To set the current day and time, you need a ntp or manual time config as well.

X460G2-24p-10G4.1 # configure time 01 10 2018 08 55 30

hth

Alexander
Hi, Alexander!

Thanks for your post.

We have an NTP Server. I have forgotten to mention ist. The syntax is:

Enable ntp vlan [name]

Configure ntp server add [Server IP] burst

Any another idea?

Carsten
Userlevel 7
could you post a screenshot of "show ntp", "show ntp ass" and "show ntp sys"
Show ntp:

NTP : Enabled
Authentication : Disabled
Broadcast-Client : Disabled
VR : VR-Default

Show ntp association:

VR Name:VR-Default Remote:[Server IP] Reference ID:INIT St:16 Poll:1024 Reach:0 Delay: 0.00000 Offset: +0.00000 Disp: 3.99217

Show NTP sys-info:

System Peer : 0.0.0.0
System Peer Mode : Unspec
Leap Indicator : 11
Stratum : 16
Precision : -15
Root Distance : 0.00000 second
Root Dipersion : 333.958 second
Reference ID : [init]
Referene Time : 00000000.00000000 Thu, Feb 7 2036 7:28:16.000
System Flags : Monitor, NTP, Kernel, Stats
Jitter : 0.000000 second
Stability : 0.000 ppm
Broadcast Delay : 0.007996 second
Auth Delay : 0.000000 second
Userlevel 7
Stratum 16 (=local clock) shows that the switch isn't synced to the NTP.

Do a "show vlan" - what VR is the switch IP using ? Is it VR-default or VR-mgmt ?
You'd try disable/enable NTP, are you able to ping the NTP from the switch ?

You'd also try another NTP to test, I use 83.218.160.135 for example on my lab switch.
The Switch IP is using vr vr-default and i can ping the Server who offers the NTP. I've disabled and enabled the NTP. But the shown time is still about 15 minutes to far.

The other NTP IP is blocked by the firewall.

Any other ideas?
Userlevel 2
Carsten Volmer wrote:

The Switch IP is using vr vr-default and i can ping the Server who offers the NTP. I've disabled and enabled the NTP. But the shown time is still about 15 minutes to far.

The other NTP IP is blocked by the firewall.

Any other ideas?

Hi.

please double check if your server is ntp or maybe sntp.

Here is my example ntp config which works fine:

4 EXOS Device als NTP-Client

-Demo.1 # enable ntp vr VR-Default

-Demo.1 # enable ntp vlan Default

-Demo.1 # configure ntp server add 10.0.184.254 vr VR-Default




4 Review der Synchronization

-Demo.1 # show ntp association 10.0.184.254 statistics

-Demo.1 # show ntp sys-info

-Demo.1 # show ntp association


hth
Alex
Carsten Volmer wrote:

The Switch IP is using vr vr-default and i can ping the Server who offers the NTP. I've disabled and enabled the NTP. But the shown time is still about 15 minutes to far.

The other NTP IP is blocked by the firewall.

Any other ideas?

Hi, Alex!

I just have put the syntax on one switch again. Here ist the result:

Slot-1 [name].11 # show ntp association [Server IP] statistics
VR Name : VR-Default
Remote Host : [Server IP]
Local Interface : 0.0.0.0
Time Last Received : 112 seconds
Time Until Next Send: 22 seconds
Reachability Change : 112 seconds
Packets Sent : 0
Packets Received : 0
Bad Authentication : 0
Bogus Origin : 0
Duplicate : 0
Bad Dispersion : 0
Bad Reference Time : 0
Candidate Order : 0

I can ping the server from the switch.
Userlevel 7
Could you try a reboot ?
Hi, Ronald!

The switches are rebootet already. Without any success.
Userlevel 7
Hi Carsten,

Can you give us the output of 'show config ntp'? Feel free to remove any IP addresses if you don't want to post them publicly.
Hi, Brandon!

# Module ntp configuration.
#
enable ntp vr VR-Default
enable ntp vlan [VLAN ID]
configure ntp server add [Server IP] burst vr VR-Default
Carsten Volmer wrote:

Hi, Brandon!

# Module ntp configuration.
#
enable ntp vr VR-Default
enable ntp vlan [VLAN ID]
configure ntp server add [Server IP] burst vr VR-Default

Another Information:

We have Summits which are simply L2-switches. There NTP is OK. I can see the MGMT-IP as the local interface. The Switches who are L3 - Switches, theres is no NTP Funktion. There is not the MGMT-IP the local IP. You can see ist above. There is no local interface. The NTP Server IP is reachable on every Switch.
SOLUTION!!!

We found a solution for that problem. We had to add the transfernet with the syntax

enable NTP vlan [Transfernet]

and then the sending IP was added as the local interface.

Thanks for everyone, who sehnd an answer!
Userlevel 2
Hi Carsten.

Thanks for providing the solution. That´s very good to know!

regards
Alexander

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