From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=MAILING_LIST_MULTI autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 807 invoked from network); 4 Jan 2022 15:50:16 -0000 Received: from minnie.tuhs.org (45.79.103.53) by inbox.vuxu.org with ESMTPUTF8; 4 Jan 2022 15:50:16 -0000 Received: by minnie.tuhs.org (Postfix, from userid 112) id 7E07794A9C; Wed, 5 Jan 2022 01:50:13 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id AA04B93FD1; Wed, 5 Jan 2022 01:50:05 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id AC41193FD1; Wed, 5 Jan 2022 01:50:03 +1000 (AEST) X-Greylist: delayed 584 seconds by postgrey-1.36 at minnie.tuhs.org; Wed, 05 Jan 2022 01:50:02 AEST Received: from clarinet.employees.org (clarinet.employees.org [198.137.202.74]) by minnie.tuhs.org (Postfix) with ESMTPS id 888D693FCC for ; Wed, 5 Jan 2022 01:50:02 +1000 (AEST) Received: by clarinet.employees.org (Postfix, from userid 1736) id C688E4E11C58; Tue, 4 Jan 2022 15:40:17 +0000 (UTC) Date: Tue, 4 Jan 2022 15:40:17 +0000 From: Derek Fawcus To: The Eunuchs Hysterical Society Message-ID: References: <97f563fa-5a17-424b-acc6-07cf127f496d@localhost> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Subject: [TUHS] VRFs (was Re: moving directories in svr2) X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" On Mon, Jan 03, 2022 at 03:23:54PM -0500, Theodore Ts'o wrote: > > Well, take a look at the ip-route man page. The BSD route command > assumes fundamentally there is a single routing table that you can > update. In Linux, there are multiple routing tables --- to support > NAT, VRF (virtual routing and forwarding), etc. Well, I never found the multiple-table thing to be that much like VRF stuff which one would find one cisco/juniper/etc, I found it more like a PBR scheme... In terms of doing stuff like VRFs, I generally just configure multiple network namespaces, and ignore the multiple tables. That said, there is now another explicit mechanism for VRFs in Linux, based in part off VLANs, and special interfaces. Maybe it also uses the multiple tables stuff? So is that 2.5 to 3 mechanisms for achieving VRFs, and/or other weird and wonderful networking games? DF