Spectracom VelaSync 1225, Руководство пользователя

Страница: 227 / 272

1.
The PC(s) must be routable to VelaSync. Make sure you can access VelaSync
Web UI from a PC that is not syncing. If the PC cannot access the Web UI, a net-
work issue likely exists. Verify the network configuration.
2.
The network clients have to be configured to synchronize to VelaSync's address.
For additional information on syncing Windows PC's, see
https://spectracom.com/documents/synchronizing-windows-computers
.
The last section of this document also contains troubleshooting assistance for
Windows synchronization. For UNIX/Linux computer synchronization, please visit
http://www.ntp.org/
.
3.
If at least one PC can sync to VelaSync, the issue is likely not with VelaSync itself.
The only VelaSync configurations that can prevent certain PCs from syncing to
the time server are the NTP Access table and MD5 authentication. See
"Con-
figuring NTP Symmetric Keys" on page 81 . A network or PC issue likely exists. A
firewall may be blocking Port 123 (NTP traffic), for example.
4.
NTP in VelaSync must be “in sync” and at a higher Stratum level than Stratum 15
(such as Stratum 1 or 2, for example). This requires VelaSync to be either synced
to its input references or in Holdover mode. Verify the current NTP stratum level
and the sync status.
5.1.9 Troubleshooting Software Update
When experiencing slow data transmission rates, or other network issues, it may be
possible that a system software update will be aborted due to a web server timeout dur-
ing the transfer.
In such an event, the Upload New File window will disappear, and the Upgrade System
Software window will be displayed again instead.
Should this happen repeatedly, you can transfer the update file using a file trans-
fer protocol such as scp, sftp or ftp, if security is not a concern. The update can
then be initiated from the Web UI or Command Line.
Disk Status: In the event of an aborted update process, under Tools >
Upgrade/Backup > Disk Status , check Percent Used : If the number is greater
than 70% , free up disk space, before starting another attempt to update the Sys-
tem Software.
VelaSync User's Manual 215
APPENDIX