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What, if any, malformed frames do 3750s forward on SPAN ports?

We're trying to troubleshoot an issue where we see inbound runt counters increasing on a switch port. However, it appears that our 3750G doesn't forward those via SPAN to our packet capture. Can anyone confirm that or point me at Cisco documentation explaining what frames are and aren't forwarded via SPAN? I tried digging around the documentation but came up short.

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What, if any, malformed frames do 3750s forward on SPAN ports?

That is correct, errored frames of any kind and nature are not forwarded.

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