Date: Tue, 21 Sep 2021 00:06:50 +0100 From: "Alexander V. Chernikov" <melifaro@ipfw.ru> To: Mark Kamichoff <prox@prolixium.com> Cc: freebsd-net <freebsd-net@freebsd.org> Subject: Re: ROUTE_MPATH and hashing Message-ID: <FB79A4F1-8A9E-4ACE-89EA-02DAAB8D81A8@ipfw.ru> In-Reply-To: <YUPi/r8iGCecEz4H@prolixium.com> References: <YUPi/r8iGCecEz4H@prolixium.com>
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> On 17 Sep 2021, at 01:36, Mark Kamichoff <prox@prolixium.com> 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: <UP,GATEWAY,DONE,PROTO1>
> 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
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