From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A2C86C433E1 for ; Fri, 24 Jul 2020 10:34:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 49C3F2067D for ; Fri, 24 Jul 2020 10:34:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=elloe.vision header.i=@elloe.vision header.b="yTmT+y7V" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726758AbgGXKeD (ORCPT ); Fri, 24 Jul 2020 06:34:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38424 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726483AbgGXKeD (ORCPT ); Fri, 24 Jul 2020 06:34:03 -0400 X-Greylist: delayed 548 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Fri, 24 Jul 2020 03:34:03 PDT Received: from iam.tj (soggy.cloud [IPv6:2a01:7e00:e000:151::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2345FC0619D3 for ; Fri, 24 Jul 2020 03:34:03 -0700 (PDT) Received: from [10.0.40.34] (unknown [51.155.44.233]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits)) (No client certificate requested) by iam.tj (Postfix) with ESMTPSA id C984134076; Fri, 24 Jul 2020 11:24:53 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=elloe.vision; s=2019; t=1595586294; bh=ZnWqvcfN4s55KZbf5LltMXcohyLygqb7IumUJThWPoI=; h=To:Cc:References:Subject:From:Date:In-Reply-To:From; b=yTmT+y7VeOX8m982nfNPNiqL9VbLfFmyDZ/hLKssIGIRWXNVFO0nUuyAfSnBIab7s VFZoGiSf/qne6fiRF0iXtufAiu6EVQIEcbT2wiLotfk4uAg4fUIQk1+wlGiu+5bpop 5EzHfzFEHxlF7bvM+GgAISxrmjRrbbPGyuiy4T0VLiXtT1QOhKxShM24tzdOFTCGMM e/JegFPgj2O6WSH4waXPDIji4Y0ybl+wtZZmGUYmqHsZJ8wCGEKicNLIAR0Sujgccu FrzwPDm2K9xEnfeO++8eq/nvk9YilDxjJI6QzfahLVSuvScDytCu+LsadqituEvq6e q3PM7E8qC5ppQ== To: netdev@vger.kernel.org Cc: chris.packham@alliedtelesis.co.nz, andrew@lunn.ch, f.fainelli@gmail.com, marek.behun@nic.cz, vivien.didelot@gmail.com References: <1b6ba265-4651-79d2-9b43-f14e7f6ec19b@alliedtelesis.co.nz> Subject: Re: dsa: mv88e6xxx losing DHCPv6 solicit packets / IPv6 multicast packets? From: "Tj (Elloe Linux)" Organization: Elloe CIC Message-ID: <0538958b-44b8-7187-650b-35ce276e9d83@elloe.vision> Date: Fri, 24 Jul 2020 11:24:53 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <1b6ba265-4651-79d2-9b43-f14e7f6ec19b@alliedtelesis.co.nz> Content-Type: text/plain; charset=utf-8 Content-Language: en-GB Content-Transfer-Encoding: 7bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org > As another thought do you know what DHCPv6 client/server is being > used. > There was a fairly recent bugfix for busybox that was needed because >the v6 code was using the wrong MAC address. I'm the customer experiencing this issue. It appears unrelated to the DHCP server software. On the Turris Mox with Debian 10 we have isc-dhcp-server 4.4.1-2. Clients are Xubuntu 20.04 withNetworkManager 1.22.10-1ubuntu2.1 using isc-dclient 4.4.1-2.1ubuntu5. Quoting from another email I sent to Turris: We've now done more testing and CONFIRMED the Mox is losing DHCPv6 solicit packets. Specifically, it seems the 88E6190 hardware switches in the Peridot module is swallowing IPv6 multicast packets (sent to ff02::1:2 ). We tested this by mirroring the Mox LAN port on an external switch and saw the DHCPv6 solicit packet egress the switch but the Mox kernel didn't see it ingress (using tcpdump).