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Ethernet Interface is connected but its status is down

Troubleshooting


Problem

An Ethernet interface is connected to the switch and enabled from the Linux configuration files, but the status is down: Slave Interface: eth<#> MII Status: down Link Failure Count: 0 Permanent HW addr: XX:XX:XX:XX:XX:XX The interface may be bonded.

Resolving The Problem

1. Log into the NPS as the root user.
2. Stop and restart the interface by entering the following commands, where # is the number of the interface:

/sbin/ifdown eth<#>; /sbin/ifup eth<#>
/sbin/ifconfig eth<#>

If the hardware is working, the interface should be listed.



3. If the interface is bonded, find the associated bond by inspecting the config file:

/etc/sysconfig/network-scripts/ifcfg-eth<#>

The line that begins with "MASTER" indicates the name of the associated bond.

DEVICE=eth<#>
BOOTPROTO=none
ONBOOT=yes
NETMASK=255.255.255.0
IPADDR=<Your IP Address>
USERCTL=no
HWADDR=<MAC-address>
MASTER=bond<X>
SLAVE=yes



4. Continuing as the root user, stop and restart the bond interface by entering the following commands, where X is the name of the associated bond:

/sbin/ifdown bond<X>; /sbin/ifup bond<X>
/sbin/ifconfig bond<X>
/sbin/ifconfig eth<#>

The interface should now be listed. However, if it is not listed, contact Netezza Support. A hardware replacement may be needed.

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Historical Number

NZ560465

Document Information

Modified date:
17 October 2019

UID

swg21570426

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