[ovs-dev] [lacp 09/10] lacp: Enable "fast" lacp timing mode.

Ben Pfaff blp at nicira.com
Thu Mar 17 23:27:13 UTC 2011


On Thu, Mar 17, 2011 at 04:23:12PM -0700, Ethan Jackson wrote:
> > Presumably there is some disadvantage to "fast" mode, since it is not
> > the default--I guess that a little latency somewhere can cause
> > spurious port-down detection--and so maybe we should document that
> > disadvantage.
> 
> I don't think there is really a disadvantage of fast mode.  Most
> implementations default to slow so I followed. LACP isn't really
> intended to be used as a link state detection protocol, it's really
> only intended for bonding configuration information.  This information
> changes very slowly (e.g. only when someone moves a cable), and in
> most cases changes cause transmits anyway.  Without a reason to enable
> fast by default, I think people choose slow cause it spits less stuff
> on the wire.

That's a good explanation, thank you.  Maybe some subset of it could
go in the docs.



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