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Troubleshooting Guide
CloudEngine 16800, 12800, 12800E, 8800, 7800, 6800, and 5800 Series Switches
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What Are the Requirements on SIP Port Connection of MPUs?

What Are the Requirements on SIP Port Connection of MPUs?

SIP ports are located on MPUs. Each MPU has two SIP ports. A SIP port is a combo port consisting of an electrical port and an optical port. It starts to work immediately after a cable is connected and does not require any configuration. By default, the working mode of a combo port depends on whether the electrical port or optical port has a cable connected first. If the electrical and optical ports are connected at the same time, the optical port works.

Figure 22-71 shows the recommended SIP port connections when each stack member switch has two MPUs.
Figure 22-71 SIP port connections

It is recommended that MPUs of the master and standby chassis should be directly connected through four cables to ensure reliability. Although a stack can still operate when the MPUs are directly connected through one cable, reliability is low. Therefore, one cable is not recommended.

Updated: 2020-01-07

Document ID: EDOC1000060766

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