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Fibre Channel Over IP

16 Continuous Access and Data Replication Manager SAN Extensions Reference Guide

To create dedicated ports between the hosts and the EVA 3000/5000s, all of the

host ports and two of the EVA 3000/5000 ports are assigned to zone A on one side

of the SAN and to zone C on the other side of the SAN. To create dedicated ports

for replication, only ports used by Continuous Access are assigned to zone B. The

management server (SAN Appliance or GPS) must be assigned to all three zones,

A, B, and C.

Network considerations

The ability to use your existing network with FCIP depends on the type of storage

replication you plan to do and the traffic already existing on your current network.

The key consideration is whether you have enough unused/available bandwidth

from your network to continue the current network load, accommodate future

growth, and handle replication load demands. Table 2 gives some

recommendations for using an existing network, based on the purpose of the

configuration being used.

In general, the FCIP equipment supports Ethernet connections of 10/100 Mbps,

and 1 Gbps (Gigabit Ethernet). The network connection should be selected to

match the amount of data to be transferred and the time allowed for that transfer.

Two tools are available to help you make performance calculations:

■ For Continuous Access EVA environments, use the Replication Performance

Estimator. Its use is documented in the HP StorageWorks Continuous Access

EVA Replication Performance Estimator Application Notes. The tool and the

application notes are available at

http://h18006.www1.hp.com/products/storage/software/conaccesseva/index.html

Table 2: Network considerations for different configuration uses

Configuration

type

Use existing

network?

Factors

Mirrored FCIP

SAN

A separate

network is

recommended.

For peak performance of your current

network, a separate network is

recommended. A dedicated network is the

benchmark for mirrored FCIP SAN systems.

Data migration The use of your

existing network

may be possible.

Data migration is a one-time movement of

data for upgrade or maintenance purposes.

During a migration it is possible to use your

existing network, but the network

performance may be significantly degraded.

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