Passthrough mode mac address mapping

Questions:
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We are setup one mushroom unit to do link aggregation between two adsl line. There will be a firewall device behind the bbna. We want to get a static WAN IP addresses from local ISP, and they require the MAC address of the device. So should I give them the mac address of the mushroom unit or the firewall device?

Answer:
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You can give you Firewall mac address, but we have a few customers that gave them both Firewall as well as Truffle’s WAN1 mac, so the ISP allows either.