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April 16th, 2015 12:00
4 Switchports Not Passing Unicast
Recently started experiencing a weird issue with my Powerconnect 2848. Four switchports just stopped working.
When a cable is plugged in, the external LEDs appear to function normally. The MAC address table is appropriately updated if I move the cable between the four ports in question.
The web interface and 'show tech-support' seem to indicate that everything is running fine. When I reset the port counters, I can see activity for multicast and broadcast, both in and out, but none for unicast.
They're all in VLAN1, there is no port security set up. They're all force-authorized. No mirroring or port aggregation is set up. No config changes were made before this issue occurred.
I initially suspected a hardware error, but everything about the ports appear to be normal except for my inability to reach the connected host.
Anyone have any thoughts/ideas?
Thanks.
DELL-Josh Cr
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April 16th, 2015 15:00
Hi,
Is it just those 4 ports that don’t work, and the rest work normally? Which ports are they? Is it the ports that are shared with the fiber ports?
battlk
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April 16th, 2015 15:00
Hi Josh,
Thanks for the reply. I should have been more clear on that detail.
The affected ports are g14,g15,g16,and g17. They are all 1G-Copper. All other ports work normally.
DELL-Josh Cr
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April 16th, 2015 16:00
Do you have anything in 13 and 18? Those 6 ports share a link to the switch cpu, so it could be something with that link. Have you, are you able to reboot the switch?
DELL-Josh Cr
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April 16th, 2015 17:00
Is flow control or storm control enabled on the ports?
battlk
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April 16th, 2015 17:00
Josh,
13 is actively being used and works fine. 18 was not used, but was tested and it works fine. We've tried rebooting the switch a couple times. It had no effect.
battlk
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April 16th, 2015 18:00
Flow control is enabled on all the ports. Storm control isn't enabled on any.
DELL-Josh Cr
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April 16th, 2015 18:00
Try enabling storm control and see if it has any effect.
battlk
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April 20th, 2015 16:00
Hi Josh,
Sorry for the delayed reply. The machine is remote so it took a little while before I had a chance to test your suggestion. Unfortunately, it didn't fix the issue. Would you happen to have any other suggestions?
I appreciate the help.
DELL-Josh Cr
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April 22nd, 2015 13:00
I emailed you for the show tech-support.