HP StorageWorks 2/140 FW 08.01.00 McDATA Products in a SAN Environment Plannin - Page 90
Public Versus Private Devices, Public device
![]() |
View all HP StorageWorks 2/140 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 90 highlights
Planning Considerations for Fibre Channel Topologies 3 Public Versus Private Devices Sphereon 4000-series fabric switches support connection of public and private arbitrated loop devices as follows: • Public device - A loop device that can transmit a fabric login (FLOGI) command to the switch, receive acknowledgement from the switch's login server, register with the switch's name server, and communicate with fabric-attached devices is a public device. The switches provide loop connectivity up to the Fibre Channel architectural limit of 127 devices per Fibre Channel port when configured as an FL_Port. Each FL_Port is assigned one arbitrated loop physical address (AL_PA), leaving 126 AL_PAs per port available for device connections. Up to 32 public devices can be connected to each of the FL_Ports. As shown in Figure 3-3, server S2 is a public loop device connected to a Sphereon 4500 Fabric Switch and can communicate with fabric-attached device D1. Figure 3-3 Public Device Connectivity Public devices support normal fabric operational requirements, such as fabric busy and reject conditions, frame multiplexing, and frame delivery order. 3-6 McDATA Products in a SAN Environment - Planning Manual
![](/manual_guide/products/hewlettpackard-316095b21-fw-080100-mcdata-products-san-environment-planning-guide-620000124510-2005-cc7608a/90.png)