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What's the difference between an MT ethernet connection and a PM ethernet connection? Intel server board has two ethernet ports that are named in that manner.

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Intel MT are PCI based NICs with the intel PRO chipset. There isn't much info on the PT cards, but it appears that they were an older model for OEMS. So I think you might have a driver mismatch, or 2 similar NICs were placed on your Board.

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I discovered that MT has access to resources outside of the local network while the PM connection is redundant, and does not reach outside of the local network.

Did not discover it from the above links.

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This seems to have nothing to do with the actual difference in the adapters, just how you have locally configured them. – Zoredache Oct 3 '11 at 23:24
You might want to check your switch configuration or the configuration of the cards. Your finding sounds like it only is a function of how your server/switch is configured, shouldn't have anything to do with being a PM or MT model card. – Bart Silverstrim Oct 3 '11 at 23:39
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