Red Hat Bugzilla – Bug 98458
change active interface command in bonding malfunctions in ALB/TLB
Last modified: 2013-07-02 22:12:33 EDT
Description of problem:
When changing the active slave in ALB/TLB modes in bonding, the previous active
slave is left in unusable state and doesn't take part of the load sharing.
Version-Release number of selected component (if applicable):
Create a bonding team with more than 2 slaves in either ALB or TLB modes, start
traffic and change the active slave.
Steps to Reproduce:
1. insmod bonding mode=5
2. ifconfig bond0 <ip-addr>
3. ifenslave bond0 eth0 eth1 eth2
4. run traffic
5. ifenslave -c bond0 eth1 (supposing eth0 was the original active)
eth1 is now the active interface but eth0 no longer transmits/receives.
eth1 is now the active interface and eth0 still takes part of the load sharing.
A bug fix patch was sent by me on July 1st to bond-devel and linux-netdev
lists - "[patch][bonding] Fix change active for ALB/TLB". To the best of my
knowledge at time of submitting this, it was not yet accepted in to Jeff's net-
drivers-2.4 BK tree.
Appears to be fix implemented in RHEL 3 B1 candidate kernel (version 2.4.21-