Dell PowerEdge VRTX - Manual (Page 251)

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FILE LOCATION: C:\Users\gina\Desktop\Checkout_new\Dell Plasma\User
Guide\Plasma_UGSwitching_Ports.fm
D E L L CO N F I D E N T I A L – P R E L I MI N A RY 4/ 1 8 /1 3 - F O R PR O O F O N LY
Flow control on the device works in Receive-Only mode, meaning that the
interfaces with enabled flow control receive PAUSE frames, but do not send
them.
When flow control is enabled, the system buffers are allocated per port so
that if the buffers of one port are consumed, other ports will still have their
free buffers.
Back Pressure
The device supports back pressure for ports configured to Half Duplex mode.
By default, this feature is disabled, and it can be enabled per port. The
back-pressure mechanism prevents the sender from transmitting additional
traffic temporarily. The receiver may occupy a link so it becomes unavailable
for additional traffic.
Port Default Settings
Table 8-1 describes the port default settings.
Jumbo Frames
Jumbo frames are frames of up to 10 Kb in size. If Jumbo frames are not
enabled, the system supports a packet size of up to 1,632 bytes.
To enable jumbo frames:
1 Click Switching > Ports > Jumbo Frames in the tree view to display the
Jumbo Frames page.
The current jumbo frames setting is displayed
Table 8-1. Port Default Settings
Function Default Setting
Port speed and mode 10/100/1000 BaseT copper: auto-negotiation
SFP+1000/10G Mbps full duplex, auto discovery
Port forwarding state Enabled
Port tagging No tagging
Flow Control On
Back Pressure Off