From: Daniel Borkmann <dborkman@redhat.com>
To: tjc@wintrmute.net
Cc: netdev@vger.kernel.org, vfalico@gmail.com
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 [thread overview]
Message-ID: <547D9AEE.6050102@redhat.com> (raw)
In-Reply-To: <bug-89161-65011@https.bugzilla.kernel.org/>
-------- 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.
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parent reply other threads:[~2014-12-02 10:56 UTC|newest]
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[parent not found: <bug-89161-65011@https.bugzilla.kernel.org/>]
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