Our server switch (10.0.0.249) it is connected with cores switch with portchannel and now its was start broadcasting with three specific mac address.
Gi1/0/31 Gi1/0/7 (X.X.X.5441)
Gi 1/0/27 Gi1/0/19 (X.X.X.56C9)
Gi1/0/31 Gi1/0/32 (X.X.X.5541)
1/0/31 Po 30 (X.X.X.CCd6)
Po 30 1/0/6 (X.X.X.CCd6)
NOW GUIDE ME HOW TO RESOLVE THIS ISSUE WHAT COMMAND I HAVE CONFIGURED WRONG ON PORT CHANNEL
I HAVE ALSO ATTACHED THE LOGS OF SERVER(10.0.0.249) SWITCH WITH CORE SWITCH 3RD FLOOR AND NMS REPORT.
Do u Configured Port channel on both side of Switches with same vlan both sides... ........ Mac flap jenarally occurs when there r Multiple Links up ... not blocked by STP..
port Po30 and port Gi1/0/6
Gi1/0/19 and port Gi1/0/36
..... find out..May be loop is There between these 2 uplinks... shut down one of them ......& check what happens..
Please also post the first byte of the mac-addresses to check if the I/G-Bit is set (unicast/multicast) and/or the U/L-Bit (globally unique/local).
Sorry, it's in the log-file.
"02" means locally administered. Talk to the Server-Guys. This might be for redundancy (NIC Teaming) or load sharing.
I found that, maybe it helps: