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Unicast block - Flood atack

Hello all.

We had several syn flood atacks to unkwnown mac last days here.  I found a nice solution tho solve it with with this one:switchport block unicast.

 

Aftert enabling this feature on all our switches, we have found another problem. Our monitorig system sometimes alerting 90 packet lost on line. But customer ip range seems to be ok.

 

Can unicast filtering case this problem? May i use these config on all ports on all switches? Including connection port betwen swithes?

How can i solve this packet loss problem after this function enabled?

 

Thank you

 

Br

Dave

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