Bonding on SLES11SP2 Hyper-V guest fails after update to kernel 3.0.38-0.5 or later
This document (7011418) is provided subject to the disclaimer at the end of this document.
Environment
SUSE Linux Enterprise Server 11 Service Pack 2
Situation
A bond configuration based on devices supported by the hv_netvsc kernel driver fails to start after updating a SLES11SP2 virtual machine, running on a Microsoft Server 2008 Hyper-V, to kernel 3.0.38-0.5 or later. The following messages can be seen in /var/log/boot.msg:
Setting up (localfs) network interfaces:
lo
lo IP address: 127.0.0.1/8
IP address: 127.0.0.2/8
done eth0 name: Virtual Ethernet Card 0
eth0 Starting DHCP4 client. .
eth0 IP address: 192.168.1.12/24
done eth1 name: Virtual Ethernet Card 1
done eth2 name: Virtual Ethernet Card 2
unused bond0
Could not enslave interface 'eth1'
Could not enslave interface 'eth2'
Removing bonding interface 'bond0'
bond0
done
Setting up service (localfs) network . . . . . . . . . .done
Resolution
Enable MAC spoofing in the settings of the virtual machine. To do so:
- Start the Hyper-V Manager
- Shutdown the virtual machine
- Open the settings for the virtual machine
- Activate "enable spoofing of MAC addresses" for each involved network interface supported by the hv_netvsc driver
The legacy network controller is supported by the kernel tulip module and is not affected by this change.
Cause
Due to a change in the driver starting with 3.0.38 the hv_netvsc driver does not only update the MAC address of the slave devices in the guest but also reports the change to the virtualization host. Because "enable spoofing of MAC addresses" is not activated, the request fails and the bond cannot be set up.
Disclaimer
This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.
- Document ID:7011418
- Creation Date: 23-Nov-2012
- Modified Date:06-Mar-2021
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- SUSE Linux Enterprise Server
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