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member interfaces to forward traffic according to its load balancing mode. The following load balancing
modes are available:
• Source FC_ID and destination FC_ID—Packets with the same source FC_ID and destination FC_ID
are classified into one flow. Packets of the same flow are forwarded on the same Selected member
interface.
• Exchange—Packets with the same exchange (an exchange is uniquely identified by the
combination of source FC_ID, destination FC_ID, and initiator Exchange_ID) are classified into one
flow. Packets of the same flow are forwarded on the same Selected member interface.
FC link aggregation networking guidelines
To make FC link aggregation operate correctly, follow these restrictions and guidelines when you build
an FC link aggregation network:
• The FC links between switches and nodes cannot be aggregated.
• FC links between two switches can be aggregated. The two switches can operate in FCF mode and
NPV mode, respectively, or both operate in FCF mode or NPV mode.
• Two FC link aggregation-enabled switches must communicate through FC aggregate interfaces.
The member interfaces of a local FC aggregation group must be connected to member interfaces
of one FC aggregation group on the peer end.
Figure 15 sh
ows a correct FC link aggregation network.
Figure 15 Correct FC link aggregation networks
Figure 16 shows an incorrect FC link aggregation network. The errors include:
• The member interfaces of a local FC aggregation group are not connected to member interfaces of
one FC aggregation group on the peer end.
• An FC aggregate interface is on one end of the link, and an FC interface is on the other end of the
link.
To modify the network errors, follow these steps:
1. Use the shutdown command to shut down the FC aggregate interfaces.
2. Correctly configure the FC aggregation groups and member interfaces.
3. Use the undo shutdown command to bring up the FC aggregate interfaces.
Switch A
SAN aggregation 1
Switch B
SAN aggregation 2
Switch A
SAN aggregation 1
Switch B
SAN aggregation 2
SAN aggregation 10 SAN aggregation 20
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