Flow Control - Cisco 7206 - VXR Router Configuration Manual

Chapter 2 Configuring Basic Interface Parameters
S e n d d o c u m e n t c o m m e n t s t o n e x u s 7 k - d o c f e e d b a c k @ c i s c o . c o m
Table 2-2
Module Type
N7K-M148GS-11
N7K-M148GS-11L
48-port 1-Gigabit Ethernet
N7K-M148GT-11
48-port 10/100/1000 Ethernet
Management
1. Default setting
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
information on setting the speed and duplex speed for other interfaces, see the
Speed and Duplex Mode" section on page

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
OL-23435-03
Speed- and Duplex-Mode Settings Used for Ethernet and Management Interfaces
Speed Mode
Setting
1
Auto
1
Auto
1000
100
10
1
Auto
1000
100
10
Cisco Nexus 7000 Series NX-OS Interfaces Configuration Guide, Release 5.x
Information About the Basic Interface Parameters
Duplex Mode
Setting
1
Auto
1
Auto
1
Auto or full
1
Auto or half
Full
1
Auto or half
Full
1
Auto
1
Auto or full
1
Auto or half
Full
1
Auto or half
Full
2-28.
Table 2-3.
Operational Operational
Speed (Mb/s) Duplex Mode
1000 Full
1000 Full
10 or 100 Half
1000 Full
100 Half
100 Full
10 Half
10 Full
1000 Full
10 or 100 Half
1000 Full
100 Half
100 Full
10 Half
10 Full
6-25. For
"Configuring the Interface
2-5