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2-5
Cisco Nexus 7000 Series NX-OS Interfaces Configuration Guide, Release 5.x
OL-23435-03
Chapter 2 Configuring Basic Interface Parameters
Information About the Basic Interface Parameters
For information on setting the speed mode and duplex mode for port-channel interfaces, see the
“Configuring the Speed and Duplex Settings for a Port-Channel Interface” section on page 6-25. For
information on setting the speed and duplex speed for other interfaces, see the “Configuring the Interface
Speed and Duplex Mode” section on page 2-28.
Flow Control
When the receive buffer for an Ethernet port that runs 1 Gb/s or faster fills, flow control enables that port
to send an IEEE 802.3x pause frame to the transmitting port to request it to stop transmitting data for a
specified amount of time. Transmitting ports, running at any speed, can receive the pause frames to stop
their transmission of data.
To allow flow control to work between two ports, you must set the corresponding receive and send flow
control parameters for both ports as enabled or desired. When you set the parameter to enabled, the send
or receive flow-control function is activated regardless of the setting of the other port. When you set the
parameter to desired, the send or receive flow-control function is activated if you set the corresponding
flow-control state of the other port to enabled or desired. If you set one of the flow control states to
disabled, flow control is disabled for that transmission direction. To see how the different port
flow-control states affect the link flow-control state, see Table 2-3.
N7K-M148GS-11
N7K-M148GS-11L
48-port 1-Gigabit Ethernet
Auto
1
Auto
1
1000 Full
N7K-M148GT-11
48-port 10/100/1000 Ethernet
Auto
1
Auto
1
1000 Full
10 or 100 Half
1000 Auto
1
or full 1000 Full
100 Auto
1
or half 100 Half
Full 100 Full
10 Auto
1
or half 10 Half
Full 10 Full
Management Auto
1
Auto
1
1000 Full
10 or 100 Half
1000 Auto
1
or full 1000 Full
100 Auto
1
or half 100 Half
Full 100 Full
10 Auto
1
or half 10 Half
Full 10 Full
1. Default setting
Table 2-2 Speed- and Duplex-Mode Settings Used for Ethernet and Management Interfaces
Module Type
Speed Mode
Setting
Duplex Mode
Setting
Operational
Speed (Mb/s)
Operational
Duplex Mode