REQUIRED_INTERFACE bp.conf entry for UNIX servers and clients

Article:HOWTO33232  |  Created: 2010-10-28  |  Updated: 2011-03-10  |  Article URL http://www.symantec.com/docs/HOWTO33232
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Environment

Subject


REQUIRED_INTERFACE bp.conf entry for UNIX servers and clients

The REQUIRED_INTERFACE entry specifies the network interface for NetBackup to use when it initiates new connections. These connections can be to another NetBackup client or server for user backups, database agent backups, and user restores.

By default, the operating system determines which interface to use if a client or server can use more than one interface. The REQUIRED_INTERFACE entry forces NetBackup to make connections through the specified network interface.

Note:

REQUIRED_INTERFACE is not used when NetBackup responds to a request that was not initiated over the required interface. In those cases, the operating system determines the network interface to use by default.

Table: REQUIRED_INTERFACE information

Usage

Description

Where to use

On a NetBackup client or server.

How to use

Add this entry to the /usr/openv/netbackup/bp.conf file. The default is that the entry does not exist and the operating system determines the interface to use.

In the following example, the network host name is host1:

REQUIRED_INTERFACE = host1

This entry should appear only once in the bp.conf file.

Example: Client with two network interfaces

This topic describes how to use the REQUIRED_INTERFACE bp.conf entry in the case of a client with two network interfaces.

One interface is for the regular network and one is for the backup network:

  • The host name for the regular network interface is clientA

  • The host name for the backup network interface is clientA_nbu

The NetBackup client name setting on both the client and server is clientA_nbu.

When users on clientA start a backup, restore, or list operation, the request goes out on the clientA_nbu interface and over the backup network. clientA and the network must be set up correctly for the request to go over the backup network interface correctly. If this configuration is not in place, clientA sends out the request out on the clientA interface and over the regular network. The server receives the request from clientA_nbu with host name clientA and refuses it because the host and the client names do not match.

One way to solve this problem is to set up the master server to allow alternate client restores for clientA. The configuration lets the server accept the request, but leaves NetBackup traffic on the regular network.

A better solution is to add the following entry to the bp.conf file on clientA:

REQUIRED_INTERFACE = clientA_nbu

Now, all backup, restore, and list requests use the clientA_nbu interface, the server receives requests from client clientA_nbu with host name clientA_nbu.

Example: Server with two network interfaces

This topic describes how to use the REQUIRED_INTERFACE bp.conf entry in the case of a server with two network interfaces.

One interface is for the regular network and one is for the backup network:

  • The host name for the regular interface is serverA

  • The host name for the backup interface is serverA_nbu

    The bp.conf file on all NetBackup servers and clients contains the entry SERVER = serverA_nbu.

    When serverA connects to a client for a backup, the request goes out on the serverA_nbu interface and over the backup network. serverA and the network must be set up correctly for the request to go over the backup network interface correctly. However, if this configuration is not in place, serverA can send out the request on the serverA interface and over the regular network. The client now receives the request from serverA rather than serverA_nbu and refuses it as coming from an invalid server.

    One way to solve this problem is to add SERVER = serverA to the bp.conf file on the client. The client now accepts requests from serverA, but leaves NetBackup traffic on the regular network.

    A better solution is to add the following entry to the bp.conf file on serverA:

    REQUIRED_INTERFACE = serverA_nbu

    Now, when serverA connects to a client, the connection is always through the serverA_nbu interface.

Equivalent Administration Console property

NetBackup Management > Host Properties > Double-click on master server > Universal Settings > Use specified network interface.

See Universal Settings properties on UNIX/Linux.

See About bp.conf entries


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