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SCE8000 authenticating same modem Mac twice

Hello  everyone

We have configured two Cisco SCE8000  in load balancing for modem MAC authentication in our ISP network

Since yesterday, SCE devices has started a abnormal behaviour in authentication. It is authenticating same modem mac on both SCE device. In general scenerio, once modem is authenticated on any, it should not be a authenticated/or have session on other SCE device.

In detail, when modem powered on, SCE1 authenticates it and browsing gets started on system. But after few minutes, 5-10 minutes, same modem gets session on SCE2 too.

On SCE, modem is showing sessions on both SCE devices.

Here the logs of SCE1 & SCE2 showing same modem in green text.

SCE8000-1#sh int LineCard 0 subscriber all-names
14:82:xxxx:fc:c7

SCE8000-2#sh int LineCard 0 subscriber all-names
14:82:xxxx:fc:c7

There has not any change made in network or SCE configuration.

Please suggest the possible root cause and  resolution of this issue.

Thanks in advance

Satwinder

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