Layer 2 arp snooping without Layer 3?

[offset <offset () ubersecurity org>]

I've been playing with arp poisoning lately and had some questions about arp poisoning without layer 3.

Is it possible to configure a linux system with one NIC to act as a layer 2 bridge instead of using IP forwarding 
(layer 3)?

I can poison another systems arp cache to come to my MAC address for its default gateway, but I'd like to do mitm 
snooping without my NIC having an IP address signed.

Just asking if this is a possibility to configure linux bridging to route traffic destined for my MAC to be routed back 
out at layer 2 to the real default gateway MAC.

I've been playing around with setting up a layer 2 bridge (bridge-utils) on linux, but not sure if I can say, all 
packets that arrive to my bridge via arp poisoning will be re-routed out to the default gateway MAC to keep the victims 
network from halting due to lack of layer 3 (no ip address to forward through).

Regards,
-- 
offset - ubersecurity org

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