Dell PowerEdge FX2 Dell PowerEdge FN I/O Aggregator Command Line Reference Gui - Page 346

Defaults, Command, Modes, History, Version 9.40.0, Usage, Information, Example, partial, assistance

Page 346 highlights

Defaults Command Modes Command History Usage Information Example (partial) 346 • rx off • tx off INTERFACE Version 9.4(0.0) Supported on the FN I/O aggregator. This command is supported in Programmable-Mux (PMUX) mode only. The globally assigned 48-bit Multicast address 01-80-C2-00-00-01 is used to send and receive pause frames. To allow full-duplex flow control, stations implementing the pause operation instruct the MAC to enable the reception of frames with a destination address equal to this multicast address. The pause: • Starts when either the packet pointer or the buffer threshold is met (whichever is met first). When the discard threshold is met, packets are dropped. • Ends when both the packet pointer and the buffer threshold fall below 50% of the threshold settings. The discard threshold defines when the interface starts dropping the packet on the interface. This may be necessary when a connected device does not honor the flow control frame sent by the switch. The discard threshold should be larger than the buffer threshold so that the buffer holds at least hold at least three packets. Important Points to Remember • Do not enable tx pause when buffer carving is enabled. For information and assistance, consult Dell Networking TAC. • Asymmetric flow control (rx on tx off, or rx off tx on) setting for the interface port less than 100 Mb/s speed is not permitted. The following error is returned: Can't configure Asymmetric flowcontrol when speed

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Defaults
rx off
tx off
Command
Modes
INTERFACE
Command
History
Version 9.4(0.0)
Supported on the FN I/O aggregator. This command is
supported in Programmable-Mux (PMUX) mode only.
Usage
Information
The globally assigned 48-bit Multicast address 01-80-C2-00-00-01 is used to send
and receive pause frames. To allow full-duplex flow control, stations implementing
the pause operation instruct the MAC to enable the reception of frames with a
destination address equal to this multicast address.
The pause:
Starts when
either
the packet pointer or the buffer threshold is met (whichever
is met first). When the discard threshold is met, packets are dropped.
Ends when
both
the packet pointer and the buffer threshold fall below 50% of
the threshold settings.
The
discard threshold
defines when the interface starts dropping the packet on the
interface. This may be necessary when a connected device does not honor the
flow control frame sent by the switch. The discard threshold should be larger than
the
buffer threshold
so that the buffer holds at least hold at least three packets.
Important Points to Remember
Do not enable
tx pause
when buffer carving is enabled. For information and
assistance, consult Dell Networking TAC.
Asymmetric flow control (
rx on tx off
, or
rx off tx on
) setting for the
interface port less than 100 Mb/s speed is not permitted. The following error is
returned:
Can’t configure Asymmetric flowcontrol when speed <1G,
config ignored
The only configuration applicable to half duplex ports is
rx off tx off
. The
following error is returned:
Cannot configure Asymmetric flowcontrol when speed <1G,
config ignored>
You cannot configure half duplex when the flow control configuration is on
(default is
rx on tx on
). The following error is returned:
Cannot configure
half duplex when flowcontrol is on, config ignored
NOTE:
The flow control must be off (
rx off tx off
) before configuring the
half duplex.
Example
(partial)
Dell(conf-if-tengig-0/1)#show config
!
interface TenGigabitEthernet 0/1
no ip address
switchport
no negotiation auto
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