kern/138407: [gre] gre(4) interface does not come up after reboot

[Boris Kochergin]

The other end is a machine that can't be rebooted for testing as 
frequently so I can't check how it behaves. Its tunnel is up and 
running. It's 7.1, though, so I don't even think it was a problem back 
then. Anyway, the state of the remote GRE tunnel does not appear to have 
any bearing on the problem. I have sniffed traffic from the 128.x 
machine on an intermediate router and it does not send anything out to 
the remote machine when I get the "ping: sendto: Network is down" 
message. Interestingly (or not?), running tcpdump on the GRE interface 
that doesn't have the RUNNING flag adds the RUNNING flag to it, and then 
it works.

-Boris

Remko Lodder wrote:
>
> I have multiple tunnels that work correctly that way. (6). Do you need 
> to issue 'ifconfig gre0 up' on the other side before it starts 
> working? or do you need to force
> it on the 128.x machine? (please try both).
>
> On Sep 4, 2009, at 6:51 PM, Boris Kochergin wrote:
>
>> ifconfig_gre0="inet 10.0.0.1 10.0.0.2 netmask 255.255.255.0 tunnel 
>> 128.238.9.201 69.12.180.23 up"
>>
>> ...in rc.conf still leaves gre0 unusable after the system comes up. 
>> There are workarounds, but this seems like something that should be 
>> fixed.
>