Connecting The Library To The Network; Jumbo Frames - Spectra Logic Spectra 2K Library User Manual

Fibre channel serverless backup ndmp iscsi

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Chapter 6. Using the Serial Port Interface

Connecting the Library to the Network

Once Ethernet parameters have been set, you are ready to attach the library to your

network.

If you are using NDMP, read the rest of this chapter in sequence.

The use of Jumbo Frames on the Gigabit Ethernet network can enhance performance.

Enlarging the packet size, or maximum transfer unit (MTU), from 1,500 bytes to 9,000

bytes reduces the overhead in the processing of the data over the Ethernet. Fewer

packets are processed, and the CPU load is decreased. Additionally, tape drives

perform better when they are kept fed (streaming) with data. To enable Jumbo Frames,

increase the MTU on the filers, Gigabit Ethernet switch, and the backup host's Ethernet

adapter. The Ethernet interface on the library will automatically negotiate for the MTU

size.

Host Bus Adapters

To enable Jumbo Frames, the MTU parameter should be increased on the Gigabit

Ethernet host bus adapter (HBA) or on the network interface card (NIC) on the unit

and on Network Appliance. You can do this through the ifconfig command on

Solaris and Network Appliance systems. On Windows NT and Windows 2000 systems,

the MTU size is configured in the driver. Check the Network Settings for the adapter

under the Control Panel. Each manufacturer implements this differently, so be sure to

check the HBA documentation for details on support of Jumbo Frames.

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