C-Series Diagnostics and Debugging | 1509
Usage
Information
Use the show hardware interface interface phy command when you are troubleshooting a link
issue, such as when the show interfaces interface command is reporting an auto-negotiation
mismatch (there is an “Auto-neg Error” string in the output, as shown below.
Figure 64-11. Auto-negotiation Mismatch Example
The no auto-negotiation command disables auto-negotiation on an interface. Dell Force10
recommends keeping auto-negotiation enabled.
If the remote interface is not configured for auto-negotiation, the Dell Force10 interface can detect the
speed at which the remote device is operating by the type of electrical signal that is arriving.
If the local and remote interfaces are configured differently for auto-negotiation—for example, one
side is configured for auto-negotiation and the other side is configured for a particular speed—the link
does no not come up. Both sides of the link must be configured for auto-negotiation (recommended) or
else the same speed.
1000Base-T requires auto-negotiation. The IEEE Ethernet standard does not support setting the speed
manually to 1000 Mbps.
1000Base-T Control 1000Base-T requires auto-negotiation. The IEEE Ethernet standard does not
support setting the speed to 1000 Mbps with the
speed command without
auto-negotiation. C-Series line cards support both full-duplex and half-duplex
1000BaseT.
Automatic MDI Crossover
Control
Indicates whether Automatic MDI crossover mode is enabled or disabled
Automatic MDI Crossover
State
Indicates whether Automatic MDI crossover state is crossover or normal.
Table 64-2. show hardware rpm number mac Output Description
FTOS#show interfaces gigabit 0/3
GigabitEthernet 0/3 is up, line protocol is down
Hardware is Force10Eth, address is 00:01:e8:07:16:b3
Internet address is not set
MTU 1554 bytes, IP MTU 1500 bytes
LineSpeed auto, Mode full duplex, Auto-neg Error
ARP type: ARPA, ARP Timeout 04:00:00
Last clearing of "show interface" counters 04:39:17
[output omitted]
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