From nobody Mon Sep 20 23:06:50 2021 X-Original-To: freebsd-net@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 445B8178E50A for ; Mon, 20 Sep 2021 23:07:06 +0000 (UTC) (envelope-from melifaro@ipfw.ru) Received: from forward108j.mail.yandex.net (forward108j.mail.yandex.net [IPv6:2a02:6b8:0:801:2::253]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4HD0Z03mDMz3hHg for ; Mon, 20 Sep 2021 23:07:04 +0000 (UTC) (envelope-from melifaro@ipfw.ru) Received: from sas1-220b3000ec3a.qloud-c.yandex.net (sas1-220b3000ec3a.qloud-c.yandex.net [IPv6:2a02:6b8:c08:796:0:640:220b:3000]) by forward108j.mail.yandex.net (Yandex) with ESMTP id 35F3B3F1F8B5; Tue, 21 Sep 2021 02:06:55 +0300 (MSK) Received: from sas1-7a2c1d25dbfc.qloud-c.yandex.net (sas1-7a2c1d25dbfc.qloud-c.yandex.net [2a02:6b8:c08:c9f:0:640:7a2c:1d25]) by sas1-220b3000ec3a.qloud-c.yandex.net (mxback/Yandex) with ESMTP id d39Sgzftkv-6sEmGxYC; Tue, 21 Sep 2021 02:06:55 +0300 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ipfw.ru; s=mail; t=1632179215; bh=6NnZ7d4lWHYtH4LBkmsBEofaDKsX3QWCH8PbZyJS1Lc=; h=To:References:Date:Subject:Cc:Message-Id:In-Reply-To:From; b=XgaLEk+mqZq2GjxS3EWdYSlKS7uW4S7R8zh3It73UfZvJmGrUN2KFjbq1JT+fJeHx 5Pmjjc6tKL10fwzLjjHtZDHNN1Ay9JdihEZEkZZmJk8jM36QFB5VtHMha/9l+8icev NVpqYyMluligPfCmqM8xnp6JWPiFylRvE6/50mok= Received: by sas1-7a2c1d25dbfc.qloud-c.yandex.net (smtp/Yandex) with ESMTPSA id yhAirzFA5M-6rl88aAu; Tue, 21 Sep 2021 02:06:53 +0300 (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client certificate not present) Content-Type: text/plain; charset=us-ascii List-Id: Networking and TCP/IP with FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-net List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-net@freebsd.org Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.120.0.1.13\)) Subject: Re: ROUTE_MPATH and hashing From: "Alexander V. Chernikov" In-Reply-To: Date: Tue, 21 Sep 2021 00:06:50 +0100 Cc: freebsd-net Content-Transfer-Encoding: quoted-printable Message-Id: References: To: Mark Kamichoff X-Mailer: Apple Mail (2.3654.120.0.1.13) X-Rspamd-Queue-Id: 4HD0Z03mDMz3hHg X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=ipfw.ru header.s=mail header.b=XgaLEk+m; dmarc=none; spf=pass (mx1.freebsd.org: domain of melifaro@ipfw.ru designates 2a02:6b8:0:801:2::253 as permitted sender) smtp.mailfrom=melifaro@ipfw.ru X-Spamd-Result: default: False [-3.00 / 15.00]; MV_CASE(0.50)[]; R_SPF_ALLOW(-0.20)[+ip6:2a02:6b8:0::/52]; RCVD_COUNT_THREE(0.00)[3]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[ipfw.ru:+]; RCPT_COUNT_TWO(0.00)[2]; NEURAL_HAM_SHORT(-1.00)[-1.000]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:208722, ipnet:2a02:6b8::/32, country:FI]; MID_RHS_MATCH_FROM(0.00)[]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[ipfw.ru:s=mail]; FREEFALL_USER(0.00)[melifaro]; FROM_HAS_DN(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[ipfw.ru]; TO_MATCH_ENVRCPT_SOME(0.00)[] X-ThisMailContainsUnwantedMimeParts: N > On 17 Sep 2021, at 01:36, Mark Kamichoff wrote: >=20 > Hi -=20 >=20 Hi Mark, > Does anyone here know how to tweak the hashing algorithm (per = flow/packet/x) > that's used for the new ROUTE_MPATH option that's in 13? >=20 > I'm using FRR 7 and I see both routes in the FIB but only one is ever > chosen and takes traffic. Is it IPv6 forwarding or the packets are originated locally? In case of former, what is the receive interface? (e.g. is it tun as = well)? >=20 > (dax:20:23:EDT)% show ipv6 route 2620:6:2003:105::/64 =20 > Routing entry for 2620:6:2003:105::/64 > Known via "bgp", distance 20, metric 0, best > Last update 08:24:34 ago > 2620:6:2000:104::35 (recursive), weight 1 > * 2620:6:2000:1ff::10c2, via tun9, weight 1 > * 2620:6:2000:1ff::1172, via tun12, weight 1 >=20 > (dax:20:23:EDT)% netstat -rn|grep 2620:6:2003:105::/64 > 2620:6:2003:105::/64 2620:6:2000:1ff::1172 UG1 = tun12 > 2620:6:2003:105::/64 2620:6:2000:1ff::10c2 UG1 = tun9 > (dax:20:23:EDT)% route -n6 get 2620:6:2003:105:: =20 > route to: 2620:6:2003:105:: > destination: 2620:6:2003:105:: > mask: ffff:ffff:ffff:ffff:: > gateway: 2620:6:2000:1ff::1172 > fib: 0 > interface: tun12 > flags: > recvpipe sendpipe ssthresh rtt,msec mtu weight expire > 0 0 0 0 1455 0 0=20 > (dax:20:23:EDT)% >=20 > I didn't see any sysctls exposed but maybe I'm not looking in the = right > place. >=20 > - Mark >=20 > --=20 > Mark Kamichoff > prox@prolixium.com > https://www.prolixium.com/ >=20