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Introduction
Part of the 100GE and 40GE optical interfaces on Pica8 switch can be used as a single interface or split into four independent interfaces. The 40GE interface can be split into four 10 Gigabit Ethernet sub-interfaces. The 100GE interface can be split into four 25 Gigabit Ethernet sub-interfaces or split into four 10 Gigabit Ethernet sub-interfaces. By default, the 100G interface will be split into 4 x 25GE sub-interfaces. With the port breakout function, one port can connect to various types of interfaces on the peer devices.
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After the interface is split, you need to use a breakout cable to connect to the device at the other end. For example, as shown in the following figure, a 40GE interface must use a breakout cable to connect to the device at the other end after being split into 4 x 10GE sub-interfaces. If the connected peer interface is also a split 40GE interface, the interfaces on both ends can be plugged into the same type of 40GE optical module and connected by one optical fiber instead of using a breakout cable.
Figure 1. The breakout cable
Configuring Port Breakout and Port Merge
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