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interax
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Posts: 39
Location: UK
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Message 1 of 4

L560 I219-LM sending multiple source MAC addresses

Hi guys,

 

We have Cisco switches with port security and 802.1x authentication.

 

Since starting to deploy L560 laptops (all using docking stations), on ports that have port security setup (limit to 1 MAC address on the port), our ports are being disbaled by port security due to more than 1 MAC address being seen on those ports. Example MAC addresses are below.

 

4889.1849.59b7

f84c.6bd3.0000

 

Trying to do a MAC address lookup on these addresses, the OUI is coming back as not registered.

 

Where are these MAC addresses coming from?

awhitman1
What's DOS?
Posts: 2
Location: US
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Message 2 of 4

Re: L560 I219-LM sending multiple source MAC addresses

Were you ever able to find a solution to this issue?  We are currently experiencing this with an L560 as well.

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interax
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Posts: 39
Location: UK
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Message 3 of 4

Re: L560 I219-LM sending multiple source MAC addresses

There is a firmware update for the NIC on the drivers page. I think it's the GBe NVM updater.

 

We've had it since January due to having widespread issues. If you have update retriever and System Update/ThinInstaller, the update can be rolled out easily.

 

That should sort out the problem

awhitman1
What's DOS?
Posts: 2
Location: US
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Message 4 of 4

Re: L560 I219-LM sending multiple source MAC addresses

Thanks, I'll give that a shot.

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