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  1. Home
  2. Veritas NetBackup™ Administrator's Guide, Volume I
  3. Section II. Configuring hosts
  4. Configuring Host Properties
  5. Configuration options for NetBackup servers
  6. THROTTLE_BANDWIDTH option for NetBackup servers
Veritas NetBackup™ Administrator's Guide, Volume I

THROTTLE_BANDWIDTH option for NetBackup servers

This option specifies a limit for the network bandwidth or transfer rate that NetBackup clients use on a network. The actual limiting occurs on the client side of the backup connection. This option limits only backups. Restores are unaffected. The default is that the bandwidth is not limited.

While LIMIT_BANDWIDTH associates a bandwidth or transfer rate with all client IP addresses in a range between two IP addresses, THROTTLE_BANDWIDTH is more useful in an IPv6 environment. THROTTLE_BANDWIDTH associates a bandwidth setting with a subnet description.

For example, the following subnet will get 400kbs bandwidth: 2001:db8:cb30:120::/64 400

Table: THROTTLE_BANDWIDTH information

Usage

Description

Where to use

On NetBackup master servers.

How to use

Use the nbgetconfig and the nbsetconfig commands to view, add, or change the option.

For information about these commands, see the NetBackup Commands Reference Guide.

Use the following format in a single line:

THROTTLE_BANDWIDTH = xxxx:xxxx:xxxx:xxxx:

yyyy:yyyy:yyyy:yyyy::/nnn zzz

Each THROTTLE_BANDWIDTH option specifies the bandwidth value and the IP address of the clients and networks to which it applies.

The following variables are defined:

  • xxxx.xxxx.xxxx.xxxx is the subnet portion (64-bits) of the IPv6 address range. (For example, 2001:db8:1:110.)

  • yyyy.yyyy.yyyy.yyyy is the host portion (64-bits) of the IPv6 address range. (For example, 0:0:0:8b72.)

  • nnn is the number of mask bits that, when applied to the IPv6 address, identifies the range of addresses that are considered for throttling. The valid range is 0 to 128. Mask bits are applied left to right across the address range.

  • zzz is the bandwidth limitation in kilobytes per second. (For example, 200.) A value of 0 disables throttling IPv6 addresses covered by this option.

Bandwidth examples

The following are LIMIT_BANDWIDTH examples:

  • Configure a bandwidth limit of 500 kilobytes per second for all computers on the subnet 2001:db8:1:110 as follows:

    LIMIT_BANDWIDTH = 2001:db8:1:110::/64 500

  • Configure a bandwidth limit of 700 kilobytes per second for a particular client (2001:db8:1:110:0:0:0:8b72) as follows:

    LIMIT_BANDWIDTH = 2001:db8:1:110:0:0:0:8b72::/128 700

  • To disable bandwidth limiting for a client in a subnet that has a bandwidth limit, specify 0 for the kilobytes per second:

    LIMIT_BANDWIDTH = 2001:db8:1:110::/64 500

    LIMIT_BANDWIDTH = 2001:db8:1:110:0:0:0:8b72::/128 0

    In this case, no limiting occurs for the client with IPv6 address 2001:db8:1:110:0:0:0:8b72

Equivalent Administration Console property

NetBackup Management > Host Properties > Master Servers > Double-click on server > Bandwidth.

See Bandwidth properties.

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