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首页 > Home > Application Notes > How to Configure Interface Breakout and Aggregate on the CISCO NCS 540 SwitchHow to Configure Interface Breakout and Aggregate on the CISCO NCS 540 Switch
Time: 2025-08-07
Previously, we introduced several methods for configuring interface breakout and aggregate on CISCO NEXUS series switches. In this article, we will use the actual test on the N540-ACC-SYS Switch as an example to demonstrate the configuration methods for breakout and aggregate of QSFP interfaces on the CISCO NCS 540 switch:
1. In the default state of the device interfaces, the QSFP interface is in aggregated mode, when checking the interface, only one independent interface is visible, with a default speed of 100G, which can be configured to 40G.
2. Enter the interface configuration in global configuration mode, executing the command "controller optics port_number", then execute "breakout breakout_mode". This command breakouts the aggregated QSFP interface, and the configuration takes effect after saving.
3. After configuring the interface as a breakout interface, checking the interface will show that the originally independent single interface has been breakout into 4 × 10G interfaces, with changes in the interface names.
4. Execute the command "no breakout breakout_mode" in interface configuration mode; you can also use the command from step 2 to configure the interface mode as 1x40 or 1x100 to cancel the interface breakout. At this point, the interface will aggregate back to the default state of the device.
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