Dell Force10 S2410-01-10GE-24P Configuration Manual page 279

When a local port connects to a remote port that does not support a speed of 1 Gbps, the speed on the local
port may be shown as 100 full. The speed cannot be changed on the port if auto-negotiation is enabled, and
the following error message will be reported (Note also that the following two figures display certain
syslog messages because
Figure 18-264. Auto-negotiation Error Message
Force10 S50 #(Interface 1/0/2)#speed 1000 full-duplex
In order for physical mode configurations to take effect, auto-negotiate must be disabled.
Use 'no auto-negotiate' command to disable.
Disable auto-negotiation with the no auto-negotiate command so the speed can be modified.
Force10 S50 (Interface 1/0/1)#no auto-negotiate
Force10 S50 (Interface 1/0/1)#
<5> JAN 01 09:14:38 10.16.128.183-1 TRAPMGR[244244160]: traputil.c(689) 79 % Link Down:
Unit: 1 Slot: 0 Port: 1
<5> JAN 01 09:14:41 10.16.128.183-1 TRAPMGR[244244160]: traputil.c(689) 80 % Link Up: Unit:1
Slot: 0 Port: 1
2. Set the speed to 1000 full with the
link will bounce, and "Link Down" and "Link Up" messages will be reported in the syslog. If the
speed is changed to a value greater than was negotiated, the link will not come up, as shown in
Figure 18-265:
Figure 18-265. Error Message when Links Do Not Come Up
Force10 S50 (Interface 1/0/1)#speed 1000 full-duplex
Force10 S50 (Interface 1/0/1)#
<5> JAN 01 09:19:27 10.16.128.183-1 TRAPMGR[244244160]: traputil.c(689) 81 % Link Down:
Unit: 1 Slot: 0 Port: 1
Force10 S50 #show port 1/0/1
Admin
Interface Type Mode
-------------- ------ -------
1/0/1 Enable Auto
3. Verify that both ends of the connection are either set or not set to auto-negotiation. When a local port is
set to auto-negotiate and a remote port is hard-coded with a speed and duplex, the link settings are not
predictable and are often undesirable.
logging console 7 is enabled in Global Config mode.):
speed 1000 full-duplex
Physical Physical Link
Mode Status Status Trap
-------- ------ ------ -------
100 Full Down
command. When the speed is changed, the
Link LACP
Mode
Enable Enable
Troubleshooting | 279