Administrator Guide

LineSpeed 1000 Mbit
Dell#show interfaces tengigabitethernet 0/8
TenGigabitEthernet 0/0 is up, line protocol is up
Hardware is DellEth, address is 90:b1:1c:f4:9a:fa
Current address is 90:b1:1c:f4:9a:fa
Pluggable media present, QSFP type is 4x10GBASE-CR1-3M
……..
LineSpeed 10000 Mbit
The show inventory command shows the following output:
NOTE: In the following show inventory media command output, the port numbers 1, 2, 3, 5, 6, and 7 ports are
actually inactive. However, Dell Networking OS still shows that optical cables are inserted into these ports. This is a
software limitation for this release.
Dell# show inventory media
Slot Port Type Media Serial Number
-------------------------------------------------------------------
0 0 SFP+ 10GBASE-SX APF12420031B3P
0 1 SFP+ 10GBASE-SX APF12420031B3P
0 2 SFP+ 10GBASE-SX APF12420031B3P
0 3 SFP+ 10GBASE-SX APF12420031B3P
0 4 SFP 10GBASE-SX APF12420031B3P
0 5 SFP 10GBASE-SX APF12420031B3P
0 6 SFP 10GBASE-SX APF12420031B3P
0 7 SFP 10GBASE-SX APF12420031B3P
0 8 QSFP 4x10GBASE-CR1-3M APF12420031B3P
0 9 QSFP 4x10GBASE-CR1-3M APF12420031B3P
0 10 QSFP 4x10GBASE-CR1-3M APF12420031B3P
0 11 QSFP 4x10GBASE-CR1-3M APF12420031B3P
0 12 QSFP 40GBASE-SR4
Layer 2 Flow Control Using Ethernet Pause Frames
Ethernet pause frames allow for a temporary stop in data transmission.
A situation may arise where a sending device may transmit data faster than a destination device can accept it. The destination sends
a pause frame back to the source, stopping the sender’s transmission for a period of time.
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
ow control, stations implementing the pause operation instruct the MAC to enable reception of frames with a destination address
equal to this multicast address.
The pause frame is dened by IEEE 802.3x and uses MAC Control frames to carry the pause commands. Ethernet pause frames are
supported on full duplex only. The only conguration applicable to half duplex ports is rx off tx off.
NOTE: If a port is over-subscribed, Ethernet Pause Frame ow control does not ensure no loss behavior.
The following error message appears when trying to enable ow control when you already congured half duplex: Can’t
configure flowcontrol when half duplex is configure, config ignored.
The following error message appears when trying to enable half duplex and ow control conguration is on: Can’t configure
half duplex when flowcontrol is on, config ignored.
Enabling Pause Frames
Enable Ethernet pause frames ow control on all ports on a chassis. If not, the system may exhibit unpredictable behavior.
NOTE: If you disable rx flow control, Dell Networking recommends rebooting the system.
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Interfaces