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tun device on 2.6?

I have just built a Sparc Ultra 2 with unstable and a locally compiled
2.6.3 kernel. I am trying to run openvpn, which requires use of the tun
device. I set up /dev/net/tun as noted in the kernel documentation, but
when I try to bring the device up by hand, I get 

[root@neghvar net]# ifconfig tun0 up
tun0: ERROR while getting interface flags: No such device

When I boot 2.4.24, the device works fine. Am I missing some software that
2.6 requires or is it broken? I searched on google for anything regarding
this issue, but the only thing I found was a two-message thread on the
kernel list saying "tun is broken on 2.6.3" and "no its not, I'm using it"
with very few details. Any suggestions?

Bradley M. Alexander                |
SysAdmin, Security Engineer    |   storm [at] tux.org
Key fingerprints:
DSA 0x54434E65: 37F6 BCA6 621D 920C E02E  E3C8 73B2 C019 5443 4E65
RSA 0xC3BCBA91: 3F 0E 26 C1 90 14 AD 0A  C8 9C F0 93 75 A0 01 34
The concept is simply staggering. Pointless, but staggering.

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