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The ethernet port name changes after rebooting

Publication Date:  2013-11-27 Views:  48 Downloads:  0
Issue Description
Environment: RH2285 + Broadcom5709 + Intel 82576 + RedHat5.4
Customer configured ip address of eth0 and eth1 by edit /etc/sysconfig/network-scripts/ifcfg-ethX. These two ports are on the intel 82576 card. The two ports eth0 and eth1 are on the broadcom5709 card after rebooting. Please see the below picture.

This picture shows the status after rebooting.

Alarm Information
None
Handling Process
1. Check this file /etc/sysconfig/network-scripts/ifcfg-ethX, and find there is no MAC address of the port in it. It can tell us this file was edit by customer manually, cause there should be MAC address in it if customer configure it by system-config-net tool.
The picture of edit by customer manually.


The picture of configured by tool:


2. It is necessary to bond the MAC address in /etc/sysconfig/network-scripts/ifcfg-ethX in Redhat 5.4 when the system have more than 2 ports. Otherwise the port name will be changed after rebooting.
Root Cause
Conclustion:
Customer didn't bond the MAC address of the port in /etc/sysconfig/network-scripts/ifcfg-ethX, that is why the port name will change after rebooting when there are more than two ports.

Solution:
Bond the MAC address of the port in /etc/sysconfig/network-scripts/ifcfg-ethX.
Just need add one row: HWADDR=XX:XX:XX:XX:XX:XX
Suggestions
Recommend to use the system tools to configure.

END