Link Message; Rtd Messages - Cisco Catalyst 2950 Software Manual

Appendix B System Messages
Error Message GIGASTACK-6-NO_LOOP_DETECT
Explanation
has been received from one of the links on a GigaStack GBIC. Either the neighboring switch does
not support the GigaStack Loop breaking algorithm or that the link between the two GigaStack
GBICs is broken. Under this condition, a GigaStack loop topology is not automatically detected, and
the connectivity between switches in the stack could be lost.
Recommended Action
running on all switches in the stack. Check the GigaStack GBICs involved to make sure that they are
functioning.

Link Message

This section contains the Link error message.
Error Message LINK-4-ERROR [chars] is experiencing errors.
Explanation
interface.
Recommended Action
The previous error is a LINK-4-ERROR message, which is logged at the Warning level. LINK-3-ERROR
Note
messages are more severe and are logged at the Error level.

RTD Messages

This section contains the Runtime Diagnostic (RTD) error messages.
Error Message RTD-1-ADDR_FLAP [chars] relearning [dec] addrs per min
Explanation
network reconfigures, due to either manual or STP reconfiguration, addresses learned on one port are
relearned on a different port. However, if there is a port anywhere in the switched domain that is
looped back to itself, addresses will jump back and forth between the real port and the port that is in
the path to the looped back port. In this message, [chars] is the interface, and [dec] is the number of
addresses being learnt.
Recommended Action
ethernet-controller addr privileged EXEC command to see the alternate path-port on which the
address is being learned. Go to the switch attached to that port. Note that the show cdp neighbors
command is useful in determining the next switch. Repeat this procedure until the port is found that
is receiving what it is transmitting, and remove that port from the network.
78-11380-03
This message means that no acknowledgement for a GigaStack loop detection request
If loop topology is used in the GigaStack, make sure that the latest software is
This message means that excessive errors have occurred on this interface: [char] is the
Check for duplex mismatches between both ends of the link.
Normally, MAC addresses are learned once on a port. Occasionally, when a switched
Determine the real path (port) to the MAC address. Use the debug
Error Messages and Recovery Procedures
Catalyst 2950 Desktop Switch Software Configuration Guide
B-5