[SunHELP] Gigabit Ethernet?

[Ganda Subrata]

Hi All,
I've installed 2 gigabits eth. card on E-450. When I set them in the same
network (for redundancy) The gigabit eth. can't going up. I try one gigabit
being down, the other can running well. The same way, when the first being
up, the other became down. So, two cards can't run together. I try again,
setting up the second card with difference-IP, they can running well.
Why two cards can't be up together? need some patches? Anyone can help me?
Any comments will be appreciated.

Thank you,

Ganda