Cisco 3110 Message Manual page 41

Chapter 2 Message and Recovery Procedures
Error Message DTP-4-TMRERR: An internal timer error occurred when trunking on
interface [chars].
Explanation
interface.
Recommended Action
However, if more problems with trunking occur, reload the switch by using the reload privileged
EXEC command.
Error Message DTP-4-UNKN_ERR: An unknown operational error occurred.
Explanation
unexpected error.
Recommended Action
Error Message DTP-5-DOMAINMISMATCH: Unable to perform trunk negotiation on port
[chars] because of VTP domain mismatch.
Explanation
be configured only when the ports belong to the same VTP domain. [chars] is the port number.
Recommended Action
Error Message DTP-5-ILGLCFG: Illegal config (on, isl--on,dot1q) on [chars].
Explanation
is configured as on with IEEE 802.1Q encapsulation. [chars] is the interface.
Recommended Action
switches. You must change the encapsulation type so that both ends of the trunk match.
Error Message DTP-5-NONTRUNKPORTON: Port [chars] has become non-trunk.
Explanation
changed.
Recommended Action
Error Message DTP-5-TRUNKPORTCHG: Port [chars] has changed from [chars] trunk to
[chars] trunk.
Explanation
the second is the original encapsulation type, and the third [chars] is the new encapsulation type.
Recommended Action
OL-12191-01
A timer used by the trunking protocol unexpectedly expired. [chars] is the trunked
This problem is corrected internally and has no long-term ramifications.
The system is unable to negotiate trunks because an internal operation generated an
Reload the switch by using the reload privileged EXEC command.
The two ports in the trunk negotiation belong to different VTP domains. Trunking can
Ensure that the ports in the trunk negotiation belong to the same VTP domain.
One end of the trunk link is configured as on with ISL encapsulation and the other end
This configuration is illegal and will not establish a trunk between two
The interface changed from a trunk port to an access port. [chars] is the interface that
This message is provided for information only.
The encapsulation type of the trunk port has changed. The first [chars] is the interface,
This message is provided for information only.
Cisco Catalyst Switch Module 3110 and 3012 for IBM BladeCenter System Message Guide
DTP Messages
2-25