What version of firmware are you running (This really helps us to help you)?
What your doing is sort of like going to a doctor and saying I have a pain when I do certain things but do not explain where the pain is or what you're doing to cause the pain.
We have posted up that we strongly suggest SMART DC switches upgrade to v1.4.0rc12 as there were some major fixes for SMART DC switches.
Thread to Download v1.4.0rcX:
viewtopic.php?f=17&t=240Thread with people discussing v1.4.0rcX:
viewtopic.php?f=17&t=1459v1.4.0rcX wrote:FIXED
- Fixed SNMP reported uptime - rc2
- Fixed rare problem with mac table not loading - rc3
- Fixed small UI issues with Firefox and IE - rc3
- Fixed SNMP CPU counters - rc4
- Fixed SNMP firmware version string - rc4
- Fixed so log messages now used VLAN ID instead of index - rc4
- Fixed RADIUS to work with SSH- rc9
- Fixed port not being in VLAN Bug- rc9
- Fixed pps being included in totals when port was excluded- rc9
- Fixed false fan failure detection *we hope*- rc9
- Fixed cleared log to indicate who cleared it- rc9
- Fixed so no duplicate VLAN ID allowed- rc9
- Fixed SSH session ending messages so not reported by dropbear- rc9
- Fixed Firefox autocomplete (workaround) - rc10
- Fixed language encoding - rc10
- Fixed console in UI - rc10
- Fixed graphs on Status Tab - rc11
- Fixed some incorrect voltage readings/alerts - rc11
- Fixed some more I2C communications problems mostly for SMART DC models. - rc12
- Fixed RSTP path cost now able to set to 1 - rc12
ENHANCEMENTS
- Increased MAX allowed DC input voltage for WS-8-250-DC and WS-12-250-DC to 61.5V for off grid solar sites - rc2
- IMPROVED SMART DC switches I2C communication- rc9
- Added HTTP Port to be changed- rc9
- Added telnet for CLI access- rc9
- Added Discovery to Tools menu- rc9
- Added multiple languages support- rc9
- Added VLAN information to SNMP- rc9
- Added Revert Timer Help Balloon- rc9
- Added total power consumption to SNMP- rc9
- Added DC input voltage graph on the Device/Status Tab- rc9
- Added tooltips to buttons- rc9
- Added increased SMTP Username length- rc9
- Added Power tab on all models for time conditions- rc9
- Change ifDescr and ifAlias- rc9
- Time Condition graphic on Christmas tree rc10
- Added To line to email header rc10
- Added more graphs for SMART DC models under Device/Status Tab - rc11
- Added an Enable/Disable check box for TFTP backup - rc11
- Reduced CPU usage - rc12
KNOWN ISSUES
- None
rc12 Released 4/14/2016 - If your running v1.4.0rcX or have a SMART DC Switch I recommend upgrading
rc11 Released 4/12/2016
rc10 Released 4/08/2016
rc9 Released 4/05/2016
rc4 Released 2/29/2016
rc3 Released 2/11/2016
rc2 Released 2/06/2016
Also if helps when you post up screen grabs of your config Tabs. You would want to post up the following Tabs.
Ports
Power
Device/Configuration
Device/Status
and any other Tabs with changes