EM(4) - Link flap when bridged and adding members (em bridge flap)

[David P. Discher]

Thanks ryan - this did appear work around the issue.
-
David P. Discher
http://davidpdischer.com/
AIM: DavidDPD | Y!M: daviddpdz 


On Dec 10, 2014, at 10:25 AM, Ryan Stone <rysto32 at gmail.com> wrote:

> From a quick look at the code, whenever an interface is added to a
> bridge, if that interface does not support a feature currently enabled
> on the bridge then it has to disable that feature on all member
> interfaces of that bridge.  That would re-init the em interface, which
> would cause a link flap.
> 
> Take a look at the ifconfig output for em0 and epair0 before epair0 is
> added to the bridge.  You will probably see that one or more features
> that em supports is not supported by epair (I would bet on something
> like LRO or TSO)..  The solution would be to disable those features
> from em0 before adding it to the bridge (you can persist this in
> rc.conf with ifconfig_em0="...")

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