nanog mailing list archives

Re: Route leak in Bangladesh


From: Nick Hilliard <nick () foobar org>
Date: Tue, 30 Jun 2015 16:04:35 +0100

On 30/06/2015 14:29, Mark Tinka wrote:
    - Get your downstreams to create route objects before you turn them up.
    - Get your provisioning teams to validate the prefixes being
provided by your downstreams.
    - Use both prefix- and AS_PATH-based filters for your downstreams.
    - Use BGP communities (as you've stated).
    - No exceptions.

plus:

- fully automate ingress prefix management
- use maxprefixes with manual reenable on all ebgp sessions

I've been caught with fully automated IRR based per-session prefix
filtering where the customer put the IXP AS macro into their AS macro.

When the customer did a 7007 on this, we accepted everything that they
announced back to us, oy vey.

So you need both.

Nick




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