Allied Telesis AT-9724TS Port Mirroring, Link Aggregation Understanding Port Trunk Groups

6-6 Port Mirroring

The Switch allows you to copy frames transmitted and received on a port and redirect the copies to another port.You can attach a monitoring device to the mirrored port, such as a sniffer or an RMON probe, to view details about the packets passing through the first port.This is useful for network monitoring and troubleshooting purposes.To view the Setup Port Mirroring window, click Port Mirroring in the Configuration folder.

Figure 6- 7. Setup Port Mirroring window

To configure a mirror port:

•Select the Source Port from where you want to copy frames and the Target Port, which receives the copies from the source port.

•Select the Source Direction, Ingress, Egress, or Both and change the Status drop-down menu to Enabled.

•Click Apply to let the changes take effect.

Note: You cannot mirror a fast port onto a slower port. For example, if you try to mirror the traffic from a 100Mbps port onto a 10Mbps port, this can cause throughput problems.The port you are copying frames from should always support an equal or lower speed than the port to which you are sending the copies.Also, the target port for the mirroring cannot be a member of a trunk group. Please note a target port and a source port cannot be the same port.

6-7 Link Aggregation

Understanding Port Trunk Groups

Port trunk groups are used to combine a number of ports together to make a single high-bandwidth data pipeline.

The AT-9724TS supports up to 32 port trunk groups with 2 to 8 ports in each group.A potential bit rate of 8000Mbps can be achieved.

10/100/1000Mbps Backbone Switch

1	3	5	7
2	4	6	8

Port Trunk Group

															1	3	5	7	9	11	13	15	17	19	21	23
AT-9724TS	Power	Link 1	3	5	7	9	11	13	15	17	19	21	23	SIO	Stack ID
	Master
		1000
	Console Act													1												21	22	23	24
		1000
	RPS	Link 2	4	6	8	10	12	14	16	18	20	22	24	2
		Act
															2	4	6	8	10	12	14	16	18	20	22	24

100Mbps 100Mbps 100Mbps

10/100Mbps Hub

10/100Mbps Hub

10/100Mbps Hub

10Mbps

10Mbps

10Mbps

10Mbps

100Mbps

100Mbps

100Mbps

100Mbps

PC PC PC PC PC PC PC PC PC

Figure 6- 8. Example of Port Trunk Group	34
Allied Telesyn AT-9724TS High-Density Layer 3 Stackable Gigabit Ethernet Switch