test

IP Network Multipathing Administration Guide

Replacing a Physical Interface That Has Failed

You must do the following manual steps before replacing a physical interface that has failed. The following procedures use physical interfaces hme0 and hme1 as example interfaces. The procedures assume that both interfaces are in a multipathing group and that hme0 has failed. The procedures also assume that the logical interface hme0:1 has the test address.

Note –

These procedures assume that you are replacing the failed interface with the same physical interface name (for example, hme0 with hme0).

How to Remove a Physical Interface That Has Failed

Note –

You can skip step 1 if the test address is plumbed using the /etc/hostname.hme0 file.

  1. Retrieve the test address configuration by typing the following command.


    # ifconfig hme0:1

hme0:1:
flags=9040842<BROADCAST,RUNNING,MULTICAST,DEPRECATED,IPv4,NOFAILOVER>
mtu 1500 index 3
inet 129.146.233.250 netmask ffffff00 broadcast 129.146.233.255

    You need this information to replumb the test address when replacing the physical interface.

    See Using the hostname File to Configure Groups and Test Addresses for details on how to configure test addresses using the hostname file.

  2. Refer to thecfgadm(1M) man page, Sun Enterprise 6x00, 5x00, 4x00, and 3x00 Systems Dynamic Reconfiguration User's Guide, or Sun Enterprise 10000 Dynamic Reconfiguration User Guide for a description of how to remove the physical interface.

How to Replace a Physical Interface That Has Failed

  1. Refer to thecfgadm(1M) man page, Sun Enterprise 6x00, 5x00, 4x00, and 3x00 Systems Dynamic Reconfiguration User's Guide, or Sun Enterprise 10000 Dynamic Reconfiguration User Guide for a description of how to replace the physical interface.

  2. Plumb in and bring up the test address by typing the following command.


    # ifconfig hme0 <test address configuration>
    Note –

    The test address configuration is the same as that configured in the /etc/hostname.hme0 file. Using the previous procedure, the test configuration is the same configuration that is displayed in step 1.

    This triggers the in.mpathd daemon to resume probing. As a result of this probing, in.mpathd will detect the repair. Consequently, in.mpathd causes the original IP address to failback from hme1.

    See Configuring Test Addresses for more details about how to configure test addresses.