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Copyright@2004~2014 Qsan Technology, Inc. All Rights Reserved.
Qsan Document – User Manual
TIP:
Please be aware that there is no “Automatic” in
Q500-F20
model. And
Q500-F21
doesn’t support automatic link speed negotiation.
▼
->
Change Connection Mode:
There are
Loop / Point-to-Point / Fabric
options. For Q500-
F30 / V100-F30 / F630Q model, 16Gb link speed supports
Point-to-Point
mode only.
。
Point-to-Point (FC-P2P):
Two devices are connected directly to each other. This is the
simplest topology, with limited connectivity.
。
Loop (Arbitrated Loop)(FC-AL):
In this design, all devices are in a loop or ring, similar to
token ring networking. Adding or removing a device from the loop causes all activity
on the loop to be interrupted. The failure of one device causes a break in the ring.
Fibre Channel hubs exist to connect multiple devices together and may bypass failed
ports. A loop may also be made by cabling each port to the next in a ring.
。
Fabric (Switched Fabric)(FC-SW):
All devices or loops of devices are connected to Fibre
Channel switches, similar conceptually to modern Ethernet implementations.
Advantages of this topology over FC-P2P or FC-AL include.
Attribute
Point-to-Point
Arbitrated Loop
Switched Fabric
Max ports
2
127
~16777216 (2^24)
Address size
N/A
8-bit ALPA
24-bit port ID
Side effect of port
Link fails
Loop fails (until port
N/A
