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esw-540-48 - direclty connected to port 34, still no MAC in ARP table

Hi all, 

I have a ESW-540-48 with firmware 2.1.21 (latest)

I have the strangest problem: I can 't find the MAC address of a computer plugged directly on the switch in the ARP table.

I'm trying to search by MAC address, and also by port . 

 

If I reboot the switch, it does work as expected.

Do you think it is software related, and in this case is there anything planned to solve this problem ? 

Or maybe I should just replace my hardware ?

 

Thanks

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1 REPLY
Green

Hi Firco, it may be possible

Hi Firco, it may be possible it is a smart port issue. The ESW switches are very particular to use the correct smart port roles for the connecting devices. I don't think a hardware replacement is warranted unless the given ports absolutely failed to forward.

 

As a secondary thought, it could also be a spanning tree issue. Ensure you're using RSTP and/or the host ports have port fast enabled. If using classic spanning tree it takes nearly a minute for a port to go to forwarding state. You can disable spanning tree on the port for testing to quickly rule that out.

-Tom Please mark answered for helpful posts http://blogs.cisco.com/smallbusiness/
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