Reset Search
 

 

Article

NTP time on Extreme switch does not get synchronized when Cisco switch acts as an NTP server

« Go Back

Information

 
TitleNTP time on Extreme switch does not get synchronized when Cisco switch acts as an NTP server
Symptoms
NTP time on an Extreme switch is not in sync with a Cisco device which is the NTP server. 
 
NTP association between both devices is present as seen from the output of show ntp association <server ip> .

* X440-48t # show ntp association
Remote                    Reference ID    St Poll Reach Delay   Offset   Disp
========================= =============== == ==== ===== ======= ======== =======
 192.168.52.254                 127.127.1.1     4  64   0     0.00542 +0.00217 3.99217Call: +0.00217 3.99217

 * X440-48t# show ntp association 192.168.52.254
Remote IP          : 192.168.52.254         Local IP           : 192.168.52.67
Host Mode          : Client          Peer Mode          : Server
Version            : 3               Key ID             : 0
Stratum            : 3               Precision          : -15
Leap               : 00              Reference ID       : 127.127.1.1
Root Distance      : 0.00000         Root Dispersion    : 0.02873
Reachability       : 000             UnReachability     : 14
Peer Poll          : 6               Host Poll          : 10
Broadcast Offset   : 0.00542         TTL/Mode           : 0
Offset             : +0.002177       Delay              : 0.00542
Error Bound        : 3.99217         Filter Error       : 0.00000
Peer Flags         : Config

However, show switch still shows non-synchronized time. The server is in IST time. 

* X440-48t.8 # show switch

SysName:          X440-48t
SysLocation:
SysContact:       support@extremenetworks.com, +1 888 257 3000
System MAC:       00:04:96:52:F6:AF
System Type:      X440-48t

SysHealth check:  Enabled (Normal)
Recovery Mode:    All
System Watchdog:  Enabled

Current Time:     Tue Jun 23 03:33:38 2015
Timezone:         [Auto DST Disabled] GMT Offset: 0 minutes, name is UTC.

1. NTP has been enabled and disabled on switch. 
2. NTP has been enabled and disabled on VLAN. 
3. NTP process has been restarted. 


 
Environment
  • EXOS
  • Summit series
Cause
Even though NTP packets are being exchanged - the Extreme switch by default maintains a local clock and timezone. This is inherent from manufacture. 

 
Resolution
Therefore, please run the following commands to get around this. 

1. configure ntp local-clock none
2. configure timezone name IST +330

This enabled the switch to get the local IST times from the NTP server. 
 
Additional notes
The below commands are also useful while troubleshooting this issue.  

1. enable ntp
2. enable ntp vlan <>
3. configure ntp server add <server IP address> 

The timezone changes depending on the location of the client and server. 

Feedback

 

Was this article helpful?


   

Feedback

Please tell us how we can make this article more useful.

Characters Remaining: 255