How to configure port mirroring on S series switches after they set up a stack or CSS

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If multiple S series switches (except S1700 switches) set up a stack or cluster, mirroring is configured in the same way as that before the stack or CSS is set up. Take a cluster of modular switches as an example. To copy packets on mirrored port GE1/1/0/1 to observing port GE2/2/0/0, configuring port mirroring as follows:
1. Configure GE2/2/0/0 as an observing port.
[Switch] observe-port 1 interface gigabitethernet 2/2/0/0
2. Copy the packets received and sent by mirrored port GE1/1/0/1 to the observing port.
[Switch] interface gigabitethernet 1/1/0/1
[Switch-GigabitEthernet1/1/0/1] port-mirroring to observe-port 1 both
[Switch-GigabitEthernet1/1/0/1] quit

Other related questions:
Difference between CSS and stack on S series switches
For S series switches, both stack and cluster indicate that combine multiple switches are virtualized into a logical switch. In V200R001C00 and earlier versions, there is only one name called stack in Chinese. In later versions, fixed switches use stack and modular switches use the cluster. Each cluster allows only two member devices, whereas a stack can contain a maximum of nine member devices.

Can S series switches automatically set up a stack
Newly delivered S series fixed switches can automatically set up a stack in stack connection mode after stack cards are correctly installed and stack cables are correctly connected. If service ports are used to set up a stack, you need to configure the service ports as stack ports and correctly connect stack cables. Then the switches will automatically set up a stack. If the switches to set up a stack are not newly delivered, you need to check the stack configurations on the switches. If not, they may fail to set up a stack. In addition, stack establishment has requirements on hardware. After stack configurations on switches are completed, the stack may fail to be set up or some member switches may fail to join the stack. Possible causes are as follows: 1. Switches of different models cannot set up a stack. 2. A switch does not support stacking. 3. A switch or stack card has no electronic label or an incorrect electronic label. 4. Stack ports are incorrectly connected. 5. Some stack cards or stack cables are faulty. 6. The stack reserved VLAN is occupied. 7. MAC addresses of stack member switches conflict.

How do S series modular switches establish a CSS
Whether the CSS ID of a port can be canceled after S series modular switches establish a CSS
After S series modular switches establish a CSS, interfaces are numbered in the format of CSS ID/slot ID/subcard ID/port. The CSS ID cannot be deleted or cancelled. To delete the CSS ID, you must disable the CSS function.

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