Q-Logic ISR6142 manual Device Access, FC Performance, Fibre Channel, Iscsi

3 – Planning Device Access

S

Device Access

Consider device access needs within the FC and iSCSI SANs. Access to an FC device is controlled by mapping FC device to specific iSCSI initiators. FC devices may be mapped to more than one initiator. Giving multiple initiators access to an FC device requires access management.

Fibre Channel

The Fibre Channel ports automatically discover all FC target devices, whether connected directly (loop) or by fabric (switch).

iSCSI

When an iSCSI initiator logs on, the router records the initiator’s iSCSI name and IP address. The management interface (command line interface [CLI] or SANsurfer Router Manager) uses the initiator’s information to simplify the mapping process.

FC Performance

The iSR6142 router supports Fibre Channel service at transmission rates of 1 Gbps or 2 Gbps with a maximum frame size of 2148 bytes. It supports Ethernet service at transmission rates of 1000-, 100- or 10-Mbps with a maximum transmission unit (MTU) size of 1500 or 9000 (jumbo frames).

NOTE:

An MTU size greater than 1500 should only be used when the router is connected to a 1000 Mbps Ethernet network.

Related performance characteristics include the following:

„Distance (see page 3-3)

„Bandwidth (see page 3-3)

„Latency (see page 3-3)

3-2 SN0051102-00 A