Figure 21 Port Mirroring Page
Table 18 Port Mirroring Fields
Description
Field
Enable port mirroring capability globally on the switch. Clear to disable the feature.
Enable Mirroring
Select the port to which packets will be mirrored.
Destination Port
For each source port you want to mirror to the destination port, select the direction
of the packets to be mirrored:
Source Port Direction
•
Tx and Rx—
All packets transmitted and received on the source port are mirrored.
•
Rx—
Only packets received on the source port are mirrored.
•
Tx—
Only packets transmitted on the source port are mirrored.
•
None—
No packets are mirrored from this port (default).
The port selected as the Destination Port is greyed-out and unavailable for selection.
Ports that are included as part of a trunk cannot be selected individually as source
ports, but trunks can be selected as source ports.
NOTE:
The Source Port CPU can be mirrored to an external port to debug traffic
to and from the CPU.
Click
Apply
to save any changes for the current boot session; the changes take effect immediately.
Flow Control
When a port becomes oversubscribed, it may begin dropping all traffic for small bursts of time
during the congestion condition. This can lead to high-priority and/or network control traffic loss.
When 802.3x flow control is enabled, a lower-speed switch can communicate with a higher-speed
switch by requesting that the higher-speed switch refrain from sending packets. Transmissions are
temporarily halted to prevent buffer overflows.
NOTE:
Flow control works well when the Link Speed is auto-negotiated.
Use the Flow Control page to enable or disable this functionality. It is disabled by default and can
be configured globally across all the ports.
To display the Flow Control page, click
Switching > Flow Control
in the navigation pane.
Flow Control
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