Recent changes in routing or IPv6 related parts?

[Chris H]

On Tue, 22 May 2018 10:12:22 +0200 "Alexander Leidinger" <Alexander at leidinger.net> said

> Hi,
> 
> I've updated 2 machines to r333966 and I see a change in the behavior  
> in the network area on one of the systems.
> 
> To begin with, the "original" behavior was not OK either, the em NIC  
> fails to "do proper network communication"  
> (https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=220997). A  
> workaround for me was so far to do an IPv4 ping to the router from  
> time to time, and if it fails do some ifconfig down/up. If the ping  
> doesn't work afterwards, reboot. Most of the time this worked.
> 
> Now I see a change in behavior, the scripts kicks in, all is ok for  
> the script afterwards, but internally (inside the machine) I can't  
> reach ipv6 jails. The system is reachable externally (only tested so  
> far is the main host-IP).
> 
> The setup is vimage based, several jails (via iocage) on epairs  
> connected via bridge to the NIC. One bridge for IPv6, one for IPv4.  
> rc.conf has prefer IPv4 setting after encountering another issue.
> 
> One IPv4 address (/32) for the host where a nginx is running to proxy  
> port 80 and 443 requests on IPv4 to the IPv6 addresses of the jails  
> (IPv6 access is going directly to the jails).
> 
> After a reboot, the nginx on the main IPv4 address delivers data from  
> the ipv6 addresses of the jails (rev-proxy setup). After a while this  
> stops working. The workaround-script mentioned above doesn't change  
> this behavior. Restarting nginx doesn't help. A reboot helps.
> 
> Has someone an idea of recent changes in a related area which may be  
> able to cause such an issue? Any rev I could try to revert to check if  
> it is related?
Hello, Alexander.
I'm not sure if this landed in -CURRENT. I only know it landed in 11.
But your trouble might be related to pr #224247 :

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=224247

Hope this helps.

--Chris
> 
> Bye,
> Alexander.
> 
> -- 
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