Transmission and interfaces going down (link state changed to DOWN)

[Zofoor]

Hi all!
I've installed transmission on a jail following this how-to:
https://forums.freenas.org/index.ph...ith-flexget-and-transmission-on-a-jail.45234/

It works, apparently without troubles, but looking at the log of freenas (and also at emails) I have many times this problem:

Code:

Sep  5 10:12:37 freenas kernel: igb0: link state changed to DOWN
Sep  5 10:12:37 freenas kernel: igb0: link state changed to DOWN
Sep  5 10:12:41 freenas devd: Executing '/etc/rc.d/dhclient quietstart igb0'
Sep  5 10:12:41 freenas kernel: igb0: link state changed to UP
Sep  5 10:12:41 freenas kernel: igb0: link state changed to UP

the ethernet interface is an Intel i210-AT of the Supermicro SSH-F mainboard.
The problem happens only when I have transmission running. On transmission I have peer-limit-global to 700.

I have tried to fix that in these ways, without success:
settings.json: peer-congestion-algorithm -> lp
settings.json: peer-socket-tos -> lowcost
tuneables: kern.ipc.somaxconn (sysctl) -> 4096
tuneables: kern.ipc.maxsockets(sysctl) -> 51200
tuneables: kern.ipc.nmbclusters (sysctl) -> 125600

Someone of you encoured on the same problem? What can I do to fix that?

I hope that someone can help me with that. It's very annoing to have the interface going down often...

PS: I had also that error "response from xxx to 200 packets per second" but I fixed it adding a tunable sysctl net.inet.icmp.icmplim => 1000).

 

[Zofoor]

Seems that I have found a workaround.
On the jail advanced configuration tab I have disabled VIMAGE and associated the second interface of the mainboard to the JAIL.
In that way, instead of having a virtual network on the jail I have a bridge interface.

It's about 30 min that I am looking at the logs and I don't see that problem anymore. I'll keep an eye on the log for the whole day but I think that this workaround works.