Re: Anycast provider for SMTP?

[Jonas Björk <mr.jonas.bjork () me com>]

> On Jun 18, 2015, at 11:29 PM, Larry Sheldon <larrysheldon () cox net> wrote:
>
> > On 6/18/2015 16:25, Jonas Björk wrote:
> >
> > > Because clients will switch to unicast for renewal. Also clients will stay
> > > with the current server forever, so you might have a bad distribution of
> > > load between the servers. If one server was down everyone will switch to
> > > the other and never go back until forced.
> >
> > Why wouldn't they go back to the nearest server when it comes back online?
>
> Been awhile, but it seems like they try to "renew" the lease they have, with the server that holds it.
>
> -- 
> sed quis custodiet ipsos custodes? (Juvenal)

The clients speak unicast with one single ip-helper which address is shared by all the servers.
They can't choose which ever server to talk to.