URGENT: WS-12-250-AC SFP Issue

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sbyrd
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URGENT: WS-12-250-AC SFP Issue

Tue Jun 23, 2015 10:43 am

I just put in a new WS-12-250-AC and on the uplink port I put in a Mikrotik 1G SFP. It links and passes traffic however I am constantly getting RX Oversize Errors. A couple hundred a second. The port on my Mikrotik router shows no errors.

What could be going on?

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sirhc
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Re: URGENT: WS-12-250-AC SFP Issue

Tue Jun 23, 2015 10:52 am

With the limited information you are providing me I would say that your MTU on the Switch is set too small.

Rx Oversize errors are from a packet larger than the MTU is set to.

What is the MTU set at on the Router port?
Are you using VLAN or VLAN withing VALAN Tagging?
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sbyrd
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Re: URGENT: WS-12-250-AC SFP Issue

Tue Jun 23, 2015 11:45 am

Thanks for your help. I upped the MTU on the switch per your suggestion and have not seen any more RX Oversize errors.

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