Re: BFD for routes learned trough Route-servers in IXPs

[Saku Ytti <saku () ytti fi>]

On Wed, 16 Sep 2020 at 23:15, Chriztoffer Hansen
<chriztoffer.hansen () de-cix net> wrote:
> On 16/09/2020 04:01, Ryan Hamel wrote:

> > CoPP is always important, and it's not just Mikrotik's with default low
> > ARP timeouts.
> >
> > Linux - 1 minute
> > Brocade - 10 minutes
> > Cumulus  - 18 minutes
> > BSD distros - 20 minutes
> > Extreme - 20 minutes
> Juniper - 20 minutes
> > HP - 25 minutes
IOS - 4 hours

Why are these considered (by Ryan) low values? Does low have a
negative connotation here?

ARP timeout should be lower than MAC timeout, and MAC timeout usually
is 300 seconds. Anything above 300seconds is probably poor BCP for
default value, as defaults should interoperate in a somewhat sane
manner.
Of course operators are free to configure very high ARP timeout, as
long as they also remember to equally configure higher MAC timeout.

-- 
  ++ytti