Information Technology Reference
In-Depth Information
Figure23-2 Troubleshooting Ethernet Autonegotiation
Has the link
autonegotiated its
behavior?
Ye s
Done
Done
No
Ye s
Are the ports
capable of doing
Auto-negotiation?
Has the link
autonegotiated its
behavior?
No
Upgrade ports/
module
No
Ye s
Have any of the ports
been hard coded?
No
Reset the ports
Ye s
Return the ports to
the default
configuration
Has the link
autonegotiated its
behavior?
Ye s
Done
No
Ye s
Has the link
autonegotiated its
behavior?
Done
Try different cables
No
Has the link
autonegotiated its
behavior?
Ye s
Try different
modules/ports
Done
No
Gather system
information and
open case
Procedures and Scenarios
Figure 23-3 shows a scenario using Cat 5k to Cat 5k, using Fast Ethernet.
