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Jumbo Frames
Table 11. Add Port Mirroring Source Fields
Click
Apply
to update the switch configuration. Your changes take effect immediately but are not
retained across a switch reset unless you click
Save Configuration
.
Jumbo Frames
Use the Jumbo Frames page to enable the switch to forward jumbo Ethernet frames. The jumbo
frames feature extends the standard Ethernet Maximum Transmission Unit (MTU) from 1518 bytes
(1522 bytes with a VLAN header) to 9216 bytes. If it is enabled, any device connecting to the same
broadcast domain should also support jumbo frames.
To display the Jumbo Frames page, click
Switching
>
Jumbo Frames
in the navigation pane.
Figure 15. Jumbo Frames Page
Select
Enabled
to configure the switch to forward jumbo frames up to 9216 bytes. If you change this
setting, click
Apply
to save the new value. The change takes effect immediately but is not retained
across a switch reset unless you click
Save Configuration
.
This feature is disabled by default.
Field
Description
Available Source Port(s)
Select the source ports or trunks to mirror to the destination port. To select multiple source
ports, hold down
Ctrl
while selecting ports. You can also select the CPU to mirror traffic sent
from the switch CPU to the switch interfaces or vice versa.
Ports that are included as part of a trunk cannot be selected individually as source ports, but
trunks can be selected as source ports.
The port selected as the Destination Port is grayed-out and unavailable for selection.
Direction
Select the type of traffic to mirror to the port:
Tx/Rx— All packets transmitted and received through the source port are mirrored.
Rx— Only packets received on the source port are mirrored.
Tx— Only packets transmitted from the source port are mirrored.
If the CPU is selected as the source port, select
Rx
to monitor traffic received by any switch
interface from the switch CPU, and select
Tx
to monitor traffic sent from any switch interface
to the switch CPU.
