Hi
New issue since upgrading the WS-C2960S-48LPS-L to c2960s-universalk9-mz.150-2.SE8.bin, MAC flapping between local access ports and the uplink.
These are all users PCs connected, anyone else seen this before for single NIC devices?
Jul 17 11:52:47.743: %SW_MATM-4-MACFLAP_NOTIF: Host 54be.xxxx.xxxx in vlan 108 is flapping between port Gi3/0/1 and port Po1
Jul 17 11:52:58.507: %SW_MATM-4-MACFLAP_NOTIF: Host 54be.xxxx.xxxx in vlan 108 is flapping between port Gi3/0/1 and port Po1
Jul 17 11:53:13.109: %SW_MATM-4-MACFLAP_NOTIF: Host 54be.xxxx.xxxx in vlan 108 is flapping between port Gi3/0/1 and port Po1
Jul 17 11:53:28.985: %SW_MATM-4-MACFLAP_NOTIF: Host 54be.xxxx.xxxx in vlan 108 is flapping between port Po1 and port Gi3/0/1
Jul 17 11:53:44.059: %SW_MATM-4-MACFLAP_NOTIF: Host 54be.xxxx.xxxx in vlan 108 is flapping between port Gi3/0/1 and port Po1
Jul 17 11:53:58.504: %SW_MATM-4-MACFLAP_NOTIF: Host 54be.xxxx.xxxx in vlan 108 is flapping between port Gi3/0/1 and port Po1
Jul 17 11:56:23.430: %SW_MATM-4-MACFLAP_NOTIF: Host 28d2.xxxx.xxxx in vlan 108 is flapping between port Po1 and port Gi1/0/29
Jul 17 13:00:09.956: %SW_MATM-4-MACFLAP_NOTIF: Host 28d2.xxxx.xxxx in vlan 108 is flapping between port Po1 and port Gi1/0/29
Jul 17 13:00:16.782: %SW_MATM-4-MACFLAP_NOTIF: Host 28d2.xxxx.xxxx in vlan 108 is flapping between port Po1 and port Gi1/0/29
Jul 17 13:03:53.266: %SW_MATM-4-MACFLAP_NOTIF: Host 28d2.xxxx.xxxx in vlan 108 is flapping between port Po1 and port Gi1/0/29
Jul 17 13:08:22.443: %SW_MATM-4-MACFLAP_NOTIF: Host 000e.xxxx.xxxx in vlan 108 is flapping between port Po1 and port Gi3/0/39
3x WS-C2960S-48LPS-L stacked running c2960s-universalk9-mz.150-2.SE8.bin for 1 week, 2 days.
#sh etherchannel sum
Flags: D - down P - bundled in port-channel
I - stand-alone s - suspended
H - Hot-standby (LACP only)
R - Layer3 S - Layer2
U - in use f - failed to allocate aggregator
M - not in use, minimum links not met
u - unsuitable for bundling
w - waiting to be aggregated
d - default port
Number of channel-groups in use: 1
Number of aggregators: 1
Group Port-channel Protocol Ports
------+-------------+-----------+-----------------------------------------------
1 Po1(SU) LACP Gi1/0/47(P) Gi1/0/48(P) Gi2/0/47(P)
Gi2/0/48(P) Gi3/0/47(P) Gi3/0/48(P)
#sh run int Gi1/0/47
Building configuration...
Current configuration : 231 bytes
!
interface GigabitEthernet1/0/47
description ### Uplink to Core-3750-switch-Gi1/0/1 ###
switchport trunk allowed vlan 1,10,100-103,105,106,108,112,116,120,301
switchport mode trunk
mls qos trust dscp
channel-group 1 mode active
end
#sh run int Gi1/0/48
Building configuration...
Current configuration : 231 bytes
!
interface GigabitEthernet1/0/48
description ### Uplink to Core-3750-switch-Gi2/0/1 ###
switchport trunk allowed vlan 1,10,100-103,105,106,108,112,116,120,301
switchport mode trunk
mls qos trust dscp
channel-group 1 mode active
end
#sh run int Gi2/0/47
Building configuration...
Current configuration : 292 bytes
!
interface GigabitEthernet2/0/47
description ### Uplink to Core-3750-switch-Gi1/0/2 ###
switchport trunk allowed vlan 1,10,100-103,105,106,108,112,116,120,301
switchport mode trunk
power inline auto max 15400
mls qos trust dscp
spanning-tree bpduguard enable
channel-group 1 mode active
end
#sh run int Gi2/0/48
Building configuration...
Current configuration : 260 bytes
!
interface GigabitEthernet2/0/48
description ### Uplink to Core-3750-switch-Gi2/0/2 ###
switchport trunk allowed vlan 1,10,100-103,105,106,108,112,116,120,301
switchport mode trunk
power inline auto max 15400
mls qos trust dscp
channel-group 1 mode active
end
#sh run int Gi3/0/47
Building configuration...
Current configuration : 260 bytes
!
interface GigabitEthernet3/0/47
description ### Uplink to Core-3750-switch-Gi1/0/3 ###
switchport trunk allowed vlan 1,10,100-103,105,106,108,112,116,120,301
switchport mode trunk
power inline auto max 15400
mls qos trust dscp
channel-group 1 mode active
end
#sh run int Gi3/0/48
Building configuration...
Current configuration : 260 bytes
!
interface GigabitEthernet3/0/48
description ### Uplink to Core-3750-switch-Gi2/0/3 ###
switchport trunk allowed vlan 1,10,100-103,105,106,108,112,116,120,301
switchport mode trunk
power inline auto max 15400
mls qos trust dscp
channel-group 1 mode active
end
#
#sh spanning-tree sum
Switch is in pvst mode
Root bridge for: VLAN0099, VLAN0107, VLAN0118, VLAN0121-VLAN0122, VLAN0555
VLAN0999
EtherChannel misconfig guard is enabled
Extended system ID is enabled
Portfast Default is disabled
PortFast BPDU Guard Default is disabled
Portfast BPDU Filter Default is disabled
Loopguard Default is disabled
UplinkFast is disabled
BackboneFast is disabled
Configured Pathcost method used is short
Name Blocking Listening Learning Forwarding STP Active
---------------------- -------- --------- -------- ---------- ----------
VLAN0001 0 0 0 6 6
VLAN0010 0 0 0 77 77
VLAN0099 0 0 0 2 2
VLAN0100 0 0 0 3 3
VLAN0101 0 0 0 7 7
VLAN0102 0 0 0 3 3
VLAN0103 0 0 0 6 6
VLAN0105 0 0 0 3 3
VLAN0106 0 0 0 3 3
VLAN0107 0 0 0 2 2
VLAN0108 0 0 0 72 72
VLAN0112 0 0 0 6 6
VLAN0116 0 0 0 3 3
VLAN0118 0 0 0 2 2
VLAN0120 0 0 0 4 4
VLAN0121 0 0 0 2 2
VLAN0122 0 0 0 2 2
VLAN0301 0 0 0 6 6
VLAN0555 0 0 0 2 2
VLAN0999 0 0 0 2 2
---------------------- -------- --------- -------- ---------- ----------
20 vlans 0 0 0 213 213
UKHPASW1#
Thanks
Iain
