Dell Force10 MXL Blade - Configure MTU Size on an Interface

248 | Interfaces
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The flow-control sender and receiver must be on the same port-pipe. Flow control is not supported across
different port-pipes
(also refer to Enabling and Disabling iSCSI Optimization on page 281).
Configure MTU Size on an Interface
If a packet includes a Layer 2 header, the difference in bytes between the link MTU and IP MTU must be
enough to include the Layer 2 header. For example, for VLAN packets, if the IP MTU is 1400, the link
MTU must be no less than 1422:
1400-byte IP MTU + 22-byte VLAN Tag = 1422-byte link MTU
The MTU range is 592-12000, with a default of 1554.
Command Syntax Command Mode Purpose
flowcontrol rx [off | on] tx [off | on] [threshold
{<1-2047> <1-2013> <1-2013>}]
INTERFACE Control how the system responds to and
generates 802.3x pause frames on 10 and
40Gig ports.
Defaults:
rx off
Parameters:
rx on: Enter the keywords rx on to process the received flow control
frames on this port.
rx off: Enter the keywords rx off to ignore the received flow control
frames on this port.
tx on: Enter the keywords tx on to send control frames from this port
to the connected device when a higher rate of traffic is received.
tx off: Enter the keywords tx off so that flow control frames are not
sent from this port to the connected device when a higher rate of traffic
is received.
Note: After you disable DCB, if link-level flow control is not automatically enabled on an interface,
manually shut down the interface (shutdown command) and re-enable it (no shutdown command) to
enable flow control.