ARP keeps getting old/wrong MAC address for gateway
Apr 12
We have implemented a new firewall.
My clients (Windows 10/11) and servers (Windows Server 2012R2) are randomly disconnecting from internet.
If I do an arp -d, then my gateway (10.0.0.1) MAC is ac-xx-xx-xx-xx-81 and I can't access the internet - I get a Reply from 10.0.0.1: Destination net unreachable..
After like 10 seconds I get internet back and everyting works perfectly. If I do a "arp -a" and now my 10.0.0.1 MAC address is 6a-xx-xx-xx-xx-de.
If I eg. tries to open a TeamViewer connection to a client, then MAC jumps back to ac-xx-xx-xx-xx-81 again and I loose internet connection for like 10 seconds.
Even though I have cleared the ARP, I keep randomly getting wrong MAC address for my gateway.
Any idea how I can erase the wrong MAC ac-xx-xx-xx-xx-81 from the entire domain?
1 answer
Accepted answer · original discussion
Apr 12
Make sure you don't have another device active that has the IP of your gateway.
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