Are services affected when one CSS cable is removed from a CSS composed of S series modular switches

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Removing a CSS cable results in packet loss in a CSS. The bandwidth cannot meet the requirements when there is heavy traffic.

Other related questions:
Are services affected after a CSS composed of S series modular switches splits
When a CSS splits, the two devices work independently, and inter-chassis services are interrupted. If MAD is configured, the physical interfaces of one device will be shut down, and services on the interfaces are interrupted.

Are services affected when one member S series modular switch leaves the CSS
When one member S series modular switch leaves the CSS, services on the switch are affected.

Are services affected when one S series modular switch joins the CSS or the CSSs merge
One device joins the CSS or the CSSs merge: (1) CSS joining indicates that a new member switch can join a running single-chassis CSS. The switch in the original single-chassis CSS becomes the master switch, and the new switch becomes the standby switch after restart. Services on the master switch are not affected and services on the standby switch are interrupted. (2) CSS merging indicates that two running CSSs can merge into one CSS. Two single-chassis CSSs merge into one and the master switch is selected as the merged CSS. The master switch retains its original configuration, and its services are not affected. The standby switch restarts, joins the new CSS as the standby switch, and synchronizes the configuration file with the master switch. Original services on this switch are interrupted.

How to restore a CSS port to a service port for the CSS composed of S series modular switches
Perform either of the following operations: 1. In non-CSS scenarios, to restore a physical member port to a service port on a standalone switch, run the undo interface css-port command in the system view. 2. In CSS scenarios, to restore a physical member port to a service port in a CSS, run the shutdown interface ** command in the logical CSS port view (run the interface css-port port-id command to enter the view) to shut down the physical member port and then run the undo port interface ** enable command.

How to split a CSS composed of S series modular switches
Perform the following steps to split the CSS of S series modular switches (two standalone switches are restored): 1. Back up the configuration file. (1) Run the save command to save the setting. (2) Run the copy source-filename destination-filename all command to back up the configuration file to the standby switch. Note: Back up the current configuration file to the storage medium of the standby switch before you split the CSS. You can use the configuration file when you set up a CSS next time. 2. Delete the CSS system MAC address. (1) Run the system-view command to enter the system view. (2) Run the undo set css system-mac command to delete the CSS system MAC address. 3. Disable the CSS function. Run the undo css enable all command to disable the CSS function on two member switches. Two standalone switches are restored after they restart. 4. Restore physical member ports to service ports. (This step is required only in service port clustering.) Note: To restore a physical member port to a service port on a standalone switch, run the undo interface css-port command. To restore a physical member port to a service port in a CSS, run the shutdown interface ** command in the logical CSS port view to shut down the physical member port and then run the undo port interface ** enable command. 5. Power off the switches and remove the cluster cables. You can also remove the cluster cables when the switches are running.

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