H3C Technologies H3C S5830V2 Series Switches - Manual (Page 174)

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• Switch A and Switch B are uniformly managed, and the hardware resources and software
processing capabilities of the two switches are integrated. When one switch fails, the other switch
can quickly take over to avoid service interruption.
Figure 45 Network diagram
Requirements analysis
To uniformly manage Switch A and Switch B and implement backup between them, configure Switch A
and Switch B to form an IRF fabric, with Switch A as the master device. The IRF fabric operates at the
access layer of the LAN and operates as the FCF switch of the SANs.
To increase the bandwidth for the link between the IRF fabric and the Ethernet switch, aggregate the links
from the Ethernet switch to Switch A and Switch B to form a multi-chassis aggregate link, Ethernet
aggregate link 3.
To transmit the storage traffic over lossless Ethernet links in the SANs, perform the following tasks:
• Configure DCBX, PFC in auto mode, and ETS on the Ethernet interfaces connecting the switches to
the server.
• Configure DCBX and PFC in auto mode on the Ethernet interfaces connecting the switches to the
disk device.
• Enable PFC by force on the Ethernet interfaces connecting switches.
To implement link backup between the server and the disk device, use two separate SANs to provide
connections between the server and the disk device. The two separate VSANs are as follows:
Link aggreg
ation 2
Link aggreg
ation 1