Hi NetPro Master.
anyone knows how to solve this problem ? i saw this problem for long time ago. but can not resolved :(
Jan 14 10:18:43.397: %C4K_EBM-4-HOSTFLAPPING: Host 00:0E:9B:53:44:1C in vlan 296 is flapping between port Fa2/2 and port
Information from CCO :
Error Message when the Host Address is a Source Address on Multiple Ports
The %C4K_EBM-4-HOSTFLAPPING:Host [mac-addr] in vlan [dec] is flapping between port [char] and port [char] error message appears.
This error message appears on the switch when the switch detects the specified host address as a source address on multiple ports.
The issue can occur due to Spanning Tree Protocol (STP) loops in the network that cause packet drops from the specific host. In addition to packet drops, STP loops lead to several other symptoms, which are listed here:
Loss of connectivity to, from, and through affected network regions.
High link utilization (often 100 percent).
High switch backplane utilization (compared to the baseline utilization).
Syslog messages that indicate packet looping in the network (for example, HSRP duplicate IP address messages).
Syslog messages that indicate constant address relearning or MAC address flapping messages.
An increase in the number of output drops on many interfaces.
Note: One or more of these symptoms independently can indicate different issues (or no issue at all). However, when you observe many of these symptoms at the same time, you must check whether a forwarding loop has developed in the network.
Enable spanning tree in order to prevent spanning tree loops. If you have disabled spanning tree, use the information in Spanning Tree Protocol Problems and Related Design Considerations to design your network without spanning tree loops.
so, what can i do with this ? i have checked the STP . looks ok but the logs still occur.
hope Master can guide me to resolve this.
your reply will be highly appreciated.