Bug 236770 - bonding driver fails to forward traffic after link down event
bonding driver fails to forward traffic after link down event
Status: CLOSED DUPLICATE of bug 236769
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: kernel (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Kernel Maintainer List
Martin Jenner
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Reported: 2007-04-17 12:04 EDT by Jon Stanley
Modified: 2007-11-16 20:14 EST (History)
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Doc Type: Bug Fix
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Last Closed: 2007-06-15 15:06:11 EDT
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Description Jon Stanley 2007-04-17 12:04:49 EDT
We are using NIC bonding under the following configuration: 
eth0 = first port of first Intel Quad port Gigabit Ethernet controller. 
eth4 = first port of second Intel Quad port Gigabit Ethernet controller. 
bond0 = bonded master interface for eth0+eth4. 
When eth0/eth4 cables were disconnected and reconnected to same ports on a 
running system, we experienced lost of network connectivity to the bond0 
Upon cable reconnect, ethtool showed valid link status as well as correct speed 
& duplex settings for the slave interfaces. (1000/FDX). 
bond0 would not recognize a valid slave interface after reconnect. 
"grep 'Active Slave' /proc/net/bonding/bond0" produced the following result: 
Currently Active Slave: None. 
running "ifconfig <if> down" and "ifconfig <if> up" for each slave interface 
eth0 and eth4 failed to affect the result. 
"ifconfig bond0" showed the correct IP address assigned to the bond0 interface, 
but IP traffic failed to reach the system over bond0. 

A reboot of the servers restored service.
Comment 1 Jason Baron 2007-06-15 15:06:11 EDT

*** This bug has been marked as a duplicate of 236769 ***

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