H3C S5120-EI Series, Руководство по установке

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3-22
affected in case one of the links fails. Whereas, a link failure in a link stack system incurs breakup of the
entire stack system. It is recommended to adopt the ring stack connection mode.
Figure 3-29
Link stack connection mode
IRF
Master
Slave
Slave
Figure 3-30
Ring stack connection mode
Each of the devices comprising a ring stack system or non-edge devices in a link stack system needs
two 10 GE ports to connect other devices; therefore, you need to install two 1-port 10 GE XFP interface
modules on such devices.
Connect the cables
Before connecting the cables, determine the actual position of the member devices and the length of
the cables, and observe the following:
z
Understand the neighbor devices for one another
z
Install the interface modules in proper slots as needed. Each S5120-EI series provides two
expansion slots.
z
Determine the ports on different devices to be connected.
Note that:
z
When 2-port interface modules are used to constitute a stack of switches and the ports are not
assigned to any aggregation group, ports of the interface module in slot 1 (MOD 1) can be
connected to ports of MOD 1 or MOD 2. However, the left port can be connected to only the right