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CISCO SWITCHES FOR SMALL and MEDIUM BUSINESS

Introducing the next generation of Cisco Small and Medium Business Switches. Cisco is refreshing its SMB Switch portfolio. Click here  to learn more.


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Beginner

Strange behaviour of CAM Table in SG300-28

We have two SG300-38 switches, both updated to the latest firmware (1.1.2.0), and both experimenting a strange problem in the MAC Address Table. It seems that the switches can not learn mac address, or forget too quickly the MACs learned.

The switches have a very basic configuration, just some vlans, but the problem is consistent across all vlans. Whenever we start a file transfer, we can see (and we confirmed it with packet captures) that the traffic is flooded among all the other ports.

To test it, we added some statics MACs, and the traffic destined to those MACs is switched correctly.

Please, is there anything I can do to stop this behaviour? It seems that we have gone back to Hub's time!

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Frequent Contributor

Strange behaviour of CAM Table in SG300-28

Natalio,

This firmware fixed some issues with MAC address tables. Factory reset switch and reconfigure and then test. I have seen a few problems when upgrading to latest 1.1.2.0 without factory resetting switches - 10% cases have to factory reset.

Jasbryan

3 REPLIES 3
Frequent Contributor

Strange behaviour of CAM Table in SG300-28

Natalio,

This firmware fixed some issues with MAC address tables. Factory reset switch and reconfigure and then test. I have seen a few problems when upgrading to latest 1.1.2.0 without factory resetting switches - 10% cases have to factory reset.

Jasbryan

Beginner

Strange behaviour of CAM Table in SG300-28

Hi Jasbryan.

talked to support and they say the same. We are doing it right now. I'll tell you how it goes (and mark as correct answer in case it is solved).

Thanks for your response.

Beginner

Strange behaviour of CAM Table in SG300-28

With the factory reset everything started to work as expected.

Thanks jasbryan.