Port Mirror - D-Link DES-3528 User Manual

xStack DES-3528 Series Layer 2 Stackable Fast Ethernet Managed Switch User Manual
State
Querier Router Behavior
Fast Leave
Click Apply to implement any changes made and <<Back to return to the MLD Snooping Settings window.

Port Mirror

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 Port Mirror window, click Layer 2 Features > Port Mirror.
To configure a mirror port:
1. Change the status to Enabled.
2. Select the Source Port from where you want to the frames to come from.
3. Select the Target Port, which receives the copies from the source port.
4. 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 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 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.
Used to enable or disable MLD snooping for the specified VLAN. This field is
Disabled by default.
This read-only field describes the current querier state of the Switch, whether
Querier, which will send out Multicast Listener Query Messages to links, or Non-
Querier, which will not send out Multicast Listener Query Messages.
This parameter allows the user to enable the fast leave function. Enabled, this
function will allow members of a multicast group to leave the group immediately
when a leave message is received by the Switch.
Figure 7- 36. Port Mirror window
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