We are in the middle of a rollout of several 1590's to our sites. One issue that we experienced yesterday was statically assigning an IP address to the WAN interface with a /31 subnet mask. It allowed the assignment of the public IPaddress & SM but would not connect to the Internet. It was a connection to BT and they regularly use these /31 subnet masks to conserve IP space. We got around the problem by assigning a /28 subnet mask instead but this is not ideal.
Has anyone else seen this issue? Is it likely to get fixed in a future firmware release for these 1590's?