'prefer older' does not work?

[Ondrej Zajicek]

On Mon, May 13, 2019 at 12:49:06PM +0300, Alexander Shikov wrote:
> Hello!
> 
> All of our BGP peers have 'prefer older' option enabled. 
> But I noticed that best route is not the oldest one:

Hi

The option 'prefer older' is a bit misnomer, it does not mean the one
with the oldest timestamp, but it means 'prefer current best route'.

So if route A was selected first, then route B was updated, and then route A
was updated again (so it has more recent timestamp), then route A is still
selected.

-- 
Elen sila lumenn' omentielvo

Ondrej 'Santiago' Zajicek (email: santiago at crfreenet.org)
OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net)
"To err is human -- to blame it on a computer is even more so."