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DES-3226 NWay Standalone Fast Ethernet Switch User’s Guide
• Group Name:[ ] – Enter a name for the port trunking group.
• Member ports:[ ][ ] [ ] – Toggle between M to indicate membership of the port trunking group, or a
dash (–) to indicate non-membership.
• Type:<TRUNK> – Toggle between TRUNK and LACP. If LACP is selected, each member of the port
trunking group must support the Link Aggregate Control Protocol. There is no protocol requirement
if TRUNK is selected.
• State:<Disabled> – This field can be toggled between Enabled and Disabled. This is used to turn a
port trunking group on or off. This is useful for diagnostics, to quickly isolate a bandwidth intensive
network device or to have an absolute backup aggregation group that is not under automatic
control.
Configure 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.
Choose Configure Port Mirroring on the Configuration menu to access the following screen:
Figure 6-31. Setup Port Mirroring screen
To configure a mirror port, enter I (ingress), E (egress), or B (ingress & egress) for each port from where
you want to copy frames in the Source Port field and then enter the port that receives the copies from
the source port in the Target Port field. The target port is where you will connect a
monitoring/troubleshooting device such as a sniffer or an RMON probe. Finally, toggle the Mirror
Status field to Enabled, highlight APPLY, and press Enter.
Note: You should not mirror a faster port or higher traffic ports on to a slower port. For example, if
you try to mirror the traffic from a 100 Mbps port onto a 10 Mbps 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 cannot be a
member of a trunk group.
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