From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Borkmann Subject: Fwd: [Bug 89161] New: Regression in bonding driver with devices that have no MAC address Date: Tue, 02 Dec 2014 11:56:46 +0100 Message-ID: <547D9AEE.6050102@redhat.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, vfalico@gmail.com To: tjc@wintrmute.net Return-path: Received: from mx1.redhat.com ([209.132.183.28]:52128 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751021AbaLBK4w (ORCPT ); Tue, 2 Dec 2014 05:56:52 -0500 In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: -------- Original Message -------- Subject: [Bug 89161] New: Regression in bonding driver with devices that have no MAC address Date: Tue, 02 Dec 2014 10:14:56 +0000 From: bugzilla-daemon@bugzilla.kernel.org To: dborkman@redhat.com https://bugzilla.kernel.org/show_bug.cgi?id=89161 Bug ID: 89161 Summary: Regression in bonding driver with devices that have no MAC address Product: Networking Version: 2.5 Kernel Version: 3.17.4 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Other Assignee: shemminger@linux-foundation.org Reporter: tjc@wintrmute.net Regression: No In kernel 3.13 and earlier, a user could use the "bonding" network module to enslave devices without MAC addresses, such as ppp devices, in certain modes (such as balance-rr). At some point between 3.13 and 3.17, this ability was removed -- even though apparently a commit was made to specifically ALLOW this to happen: https://github.com/torvalds/linux/commit/f54424412b6b2f64cae4d7c39d981ca14ce0052c On kernel 3.13, this was printed to syslog upon enslaving ppp0: bonding: bond0: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active. bonding: bond0: enslaving ppp0 as an active interface with an up link. On kernel 3.17.2 and 3.17.4 (and probably others) instead this error comes up: bond0: Adding slave ppp0 bond0: The slave device specified does not support setting the MAC address And the slave is not added. In case it was relevant, I resorted to manually creating the bond0 with appropriate options (including fail_over_mac) preset, and yet the problem persists. To replicate the problem, setup at least one ppp connection, and then follow these instructions: modprobe bonding echo '+bond0' > /sys/class/net/bonding_masters echo 'active' > /sys/class/net/bond0/bonding/fail_over_mac ifconfig bond0 down echo 'balance-rr' > /sys/class/net/bond0/bonding/mode ifconfig bond0 202.xx.xx.xx netmask 255.255.255.255 mtu 1492 up echo '500' > /sys/class/net/bond0/bonding/miimon ifconfig ppp0 down echo '+ppp0' > /sys/class/net/bond0/bonding/slaves Under earlier kernel versions, that would work -- but current stable kernels fail. -- You are receiving this mail because: You are watching the assignee of the bug.