switch port in dot1x multi-auth mode stops passing traffic

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May 7th, 2010
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Dear All,


I am experiencing a problem on a Catalyst 4510 (cat4500-ipbasek9-mz.122-53.SG.bin) with 802.1x configured. Client PCs are connected via a mini desktop switch to a Cat 4510 switched port in multi-auth mode. The configuration of the port follows:


!
interface GigabitEthernet2/34
switchport mode access
ip arp inspection limit rate 30
authentication host-mode multi-auth
authentication port-control auto
authentication periodic
authentication timer reauthenticate server
dot1x pae authenticator
dot1x timeout tx-period 5
dot1x max-reauth-req 6
spanning-tree portfast
ip verify source vlan dhcp-snooping
end


It happens from time to time that the Cat 4510 port stops passing traffic. Reconnecting the mini switch recovers the communication. Client PCs connected to the mini switch seem to be authorized at the moment when the problem occures. The RADIUS Termination-Action attribute is set to RADIUS-Request. The problem is not present if "authentication periodic" is disabled.


Did anyone experience a simmilar problem? Any advice?


Thanks.


Mirek

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mgraham50 Fri, 11/04/2011 - 06:22
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We have the same issue on 3750E switch running 12.2.(58)SE

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