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6-5
Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
OL-29284-01, Release 6.x
Chapter 6 Configuring PortChannels
Information About PortChannels
Figure 6-4 SID1 and DID1-Based Load Balancing
Figure 6-5 illustrates how exchange-based load balancing works. When the first frame in an exchange is
received for forwarding on an interface, link 1 is chosen by a hash algorithm. All remaining frames in
that particular exchange are sent on the same link. For exchange 1, no frame uses link 2. For the next
exchange, link 2 is chosen by the hash algorithm. Now all frames in exchange 2 use link 2.
Frame 1
Frame 2
Frame 3
Frame 1
Frame 2
Frame 3
Frame n
Frame 1
Frame 2
Frame 3
Frame n
Frame n
SID1, DID1,
Exchange 1
SID1, DID1,
Exchange 2
SID2, DID2
Exchange 1
Link 1
Link 2
Link 1
Link 2
Link 1
Link 2
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