Question from a Dummy: how can I find out which device is spamming my Logs?

I am getting flooded with messages like
cannot forward src fe80:1::e0c:cf96:88f5:8e9, dst 2001:470:70af:23::6, nxt 17, rcvif ix0, outif igc1
cannot forward src fe80:1::e0c:cf96:88f5:8e9, dst 2001:470:70af:23::6, nxt 17, rcvif ix0, outif igc1
cannot forward src fe80:1::e0c:cf96:88f5:8e9, dst 2001:470:70af:23::6, nxt 6, rcvif ix0, outif igc1
cannot forward src fe80:1::e0c:cf96:88f5:8e9, dst 2001:470:70af:23::6, nxt 17, rcvif ix0, outif igc1
cannot forward src fe80:1::e0c:cf96:88f5:8e9, dst 2001:470:70af:23::6, nxt 17, rcvif ix0, outif igc1
cannot forward src fe80:1::e0c:cf96:88f5:8e9, dst 2001:470:70af:23::6, nxt 6, rcvif ix0, outif igc1
cannot forward src fe80:1::e0c:cf96:88f5:8e9, dst 2001:470:70af:23::6, nxt 17, rcvif ix0, outif igc1
cannot forward src fe80:1::e0c:cf96:88f5:8e9, dst 2001:470:70af:23::6, nxt 17, rcvif ix0, outif igc1
cannot forward src fe80:1::e0c:cf96:88f5:8e9, dst 2001:470:70af:23::6, nxt 6, rcvif ix0, outif igc1
cannot forward src fe80:1::e0c:cf96:88f5:8e9, dst 2001:470:70af:23::6, nxt 6, rcvif ix0, outif igc1
cannot forward src fe80:1::e0c:cf96:88f5:8e9, dst 2001:470:70af:23::6, nxt 17, rcvif ix0, outif igc1
cannot forward src fe80:1::e0c:cf96:88f5:8e9, dst 2001:470:70af:23::6, nxt 17, rcvif ix0, outif igc1
cannot forward src fe80:1::e0c:cf96:88f5:8e9, dst 2001:470:70af:23::6, nxt 6, rcvif ix0, outif igc1
cannot forward src fe80:1::e0c:cf96:88f5:8e9, dst 2001:470:70af:23::6, nxt 17, rcvif ix0, outif igc1

But how can I find out who/what fe80:1::e0c:cf96:88f5:8e9 actually is to look at it's config and hopefully fix it?
Sure it comes from ix0 (but there are over 100 devices there) but then???

Update: found out that it was my own windows pc (not sure yet why, but anyway). delete this threat pls.
 
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