Concept Guide

Example of the show interfaces status Command to View Link Status
NOTE: The show interfaces status command displays link status, but not administrative status. For both link and
administrative status, use the show ip interface command.
DellEMC#show interfaces status
Port Description Status Speed Duplex Vlan
Te 1/1/1 Down Auto Mbit Auto --
Te 1/1/2 Down 10000 Mbit Auto --
Te 1/1/3 Down Auto Mbit Auto --
Te 1/1/4 Down 10000 Mbit Auto --
Te 1/2/1 Up 10000 Mbit Full 2-5
Te 1/2/2 Up 10000 Mbit Full 2-5
Te 1/2/3 Up Auto Mbit Full 2-5
Te 1/2/4 Up 10000 Mbit Full 2-5
Fo 1/3 Down 40000 Mbit Auto --
Fo 1/4 Down 40000 Mbit Auto --
Fo 1/5 Down Auto Mbit Auto --
[output omitted]
In the previous example, several ports display “Auto” in the Speed eld. In the following example, the speed of port 1/1 is set to 100Mb and
then its auto-negotiation is disabled.
DellEMC#configure
DellEMC(config)#interface tengig 1/1/1/1
DellEMC(conf-if-te-1/1/1/1)#speed 100
DellEMC(conf-if-te-1/1/1/1)#duplex full
DellEMC(conf-if-te-1/1/1/1)#no negotiation auto
DellEMC(conf-if-te-1/1/1/1)#show config
!
interface TenGigabitEthernet 1/1/1/1
no ip address
speed 100
duplex full
no shutdown
Syslog Warning Upon Connecting SFP28 Optics with
QSA
When you connect the SFP28 optics with the QSA, the system displays the following syslog warning:
For Dell-qualied SFP28 optics:
Aug 5 01:14:55 %S6100-ON:1 %IFAGT-5-INSERT_OPTICS_SFP28: Optics SFP28 inserted in stack-unit 1
module 2 port 2/1. Wrong QSA in use. Please utilize QSA28, not lower speed QSA to guarantee
support and performance for 25G Optics and cables
For non Dell-qualied SFP28 optics:
Aug 8 20:31:56 % S6100-ON:1 %IFAGT-5-UNSUP_OPTICS: Non-qualified optics in stack-unit 1 module
2 port 2/1. Wrong QSA in use. Please utilize QSA28, not lower speed QSA to guarantee support
and performance for 25G Optics and cables
Adjusting the Keepalive Timer
To change the time interval between keepalive messages on the interfaces, use the keepalive command. The interface sends keepalive
messages to itself to test network connectivity on the interface.
To change the default time interval between keepalive messages, use the following command.
• Change the default interval between keepalive messages.
INTERFACE mode
keepalive [seconds]
Interfaces
443