nanog mailing list archives
Re: Dear Windstream engineers
From: Saku Ytti <saku () ytti fi>
Date: Mon, 1 Feb 2016 11:08:51 +0200
On 1 February 2016 at 08:17, joel jaeggli <joelja () bogus com> wrote: Hey,
source based RTBH requires urpf, which while generally available may have practical limitations on implementation.
I'd say uRPF/loose is one way to do it on some platforms. In JunOS for longest time it was not possible, and in default config it still is not, as source route pointing to null does not fail uRPF/loose check. However JunOS has had ~always SCU (I compare it to QPPB in CSCO) which can be used to implement source based RTBH, without use of uRPF. It likely out-performs uRPF/loose massively, as you don't have to do two LPM lookups. -- ++ytti
Current thread:
- Re: Dear Windstream engineers Saku Ytti (Feb 01)
- <Possible follow-ups>
- Re: Dear Windstream engineers Hoyt, Michael (Feb 01)