Re: Setting sensible max-prefix limits

[Jared Mauch <jared () puck nether net>]

> On Aug 18, 2021, at 9:38 AM, John Kristoff <jtk () dataplane org> wrote:
>
> Maybe because there isn't a simple, universal approach to setting it.
> Probably like a lot of people, historically I'd set it to
> some % over the current stable count and then manually adjust when the
> limits were about to be breached, or often was the case when they were
> and I wasn't ready for it. Not ideal.
>
> I've never felt the automation of this setting however was worth the
> effort.  Of course I am not usually responsible for hundreds of routers
> and thousands of peering sessions.

We did a variant of this at NTT, with certain baseline settings.  Sometimes networks would advertise more routes 
because they onboarded a large customer and it would cause manual updates to be necessary.

Polling daily and snapshotting these values is important to understand what is changing.  The reason I just posted a 
message about Akamai max-prefix is we have been giving some general guidance that is out of line/norm compared to what 
perhaps what we want.  This won’t cause a service outage per-se but will cause suboptimal routing as we continue to 
make improvements and upgrades to our network.

- Jared