I would not think this is an hardware issue. To restore port, you need to do a shut first and then no shut. For automatic recovery, you need to configure "errdisable recovery cause all" or "errdisable recovery cause link-flap".

Similar Messages

WLC 5508 reboot cause switch port link flap error disable

Hi All
today my customer call me saied after reboot WLC , the switch port was err-disable , the cause is link flap
after we reboot 3 times , the switch port link flap err-disable every time
does anyone to meet the same problem??
we don't know why the WLC rebboot will cause it , it just normal action on device
the WLC version is 7.4.100.0
link switch with access port , no port channel , no portfast
Asa Hung 2013/05/30

Hello Asa,
As per your query i can suggest you the following solution-
Complete these steps to reset the WLC to factory default settings using the CLI:
Enter reset system at the command prompt.
At the prompt that asks whether you need to save changes to the configuration, enter Y or N. The unit reboots.
When you are prompted for a username, enter recover-config to restore the factory default configuration.
The WLC reboots and displays the Welcome to the Cisco WLAN Solution Wizard Configuration Tool message.
Use the configuration wizard to enter configuration settings.
Note: Once the WLC is reset to defaults, you need a serial connection to the WLC in order to use the configuration wizard.
Hope this will help you.

Link flap problem?

Hello everyone,
Quick question about what causes a "link flap failure"
Here is the output
11-07-2005 18:48:38 Local7.Warning 172.16.208.184 1737: *Mar 13 05:47:09.196: %PM-4-ERR_DISABLE: link-flap error detected on Gi0/1, putting Gi0/1 in err-disable state
11-07-2005 18:49:10 Local7.Error 205.110.152.19 9281: 1w3d: %LINK-3-UPDOWN: Interface FastEthernet0/5, changed state to up
11-07-2005 18:50:53 Local7.Warning 172.16.208.184 1738: *Mar 13 05:49:23.765: %PM-4-ERR_RECOVER: Attempting to recover from link-flap err-disable state on Gi0/1
11-07-2005 18:50:55 Local7.Error 172.16.208.184 1739: *Mar 13 05:49:26.137: %LINK-3-UPDOWN: Interface GigabitEthernet0/1, changed state to up
I leave the errdisable recovery on and it brings the port back up once the timer goes.
What causes this link flap?
Thanx

Hello there 8)
From the previously mentioned switch:
Gi0/1 TRUNK TO ISF159 connected trunk a-full a-1000 1000BaseLX
CONTRA#sh run | begin Gig
interface GigabitEthernet0/1
description TRUNK TO AS
switchport mode trunk
This is from the connected switch:
Gi0/1 TRUNK TO CONTRACTO connected trunk a-full a-1000 1000BaseLX
AS#sh run | begin Gig
interface GigabitEthernet0/1
description TRUNK TO CONTRACTORS
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
Thanx for any help

%SW_MATM-4-MACFLAP_NOTIF: Host 00ff.ffff.ffff in vlan 112 is flapping between port Gi3/0/1 and port Fa2/0/46.....

Hi Guys,
Iam seeing above issue on two of my switches connected to core switch ....i know there are quite of few discussion open on same issue but mine is diff....
i see same issue on two switches connected via core swicth on same vlan ( 112)....when i do mac address lookup it says the mac thats generating this error is invalid so cant track the source of this mac....also just saw on topoogy change notification on core traced it back to originating switch which is also generating this error but dnt see any change on the switch that is generated topology change notification....prob is vlan 112 all interface on both switches conected via core are generating this message so five interfaces each .....any expert advise on how to approach it as i cant get to source port generating this as nearly five ports in vlan 112 on bloth switches generating this error. thanks
Apr 15 15:56:08: %SW_MATM-4-MACFLAP_NOTIF: Host 00ff.ffff.ffff in vlan 112 is flapping between port Fa3/0/46 and port Gi3/0/1
Apr 15 15:56:50: %SW_MATM-4-MACFLAP_NOTIF: Host 00ff.ffff.ffff in vlan 112 is flapping between port Fa2/0/46 and port Gi3/0/1
Apr 15 15:56:51: %SW_MATM-4-MACFLAP_NOTIF: Host 00ff.ffff.ffff in vlan 112 is flapping between port Fa3/0/46 and port Gi3/0/1
Apr 15 15:58:29: %SW_MATM-4-MACFLAP_NOTIF: Host 00ff.ffff.ffff in vlan 112 is flapping between port Fa2/0/46 and port Gi3/0/1
Apr 15 15:59:27: %SW_MATM-4-MACFLAP_NOTIF: Host 00ff.ffff.ffff in vlan 112 is flapping between port Gi3/0/1 and port Fa2/0/46
Apr 15 15:59:45: %SW_MATM-4-MACFLAP_NOTIF: Host 00ff.ffff.ffff in vlan 112 is flapping between port Fa2/0/46 and port Gi3/0/1
Apr 15 16:00:14: %SW_MATM-4-MACFLAP_NOTIF: Host 00ff.ffff.ffff in vlan 112 is flapping between port Gi3/0/1 and port Fa3/0/46
Apr 15 16:00:36: %SW_MATM-4-MACFLAP_NOTIF: Host 00ff.ffff.ffff in vlan 112 is flapping between port Fa2/0/46 and port Gi3/0/1
Apr 15 16:02:40: %SW_MATM-4-MACFLAP_NOTIF: Host 00ff.ffff.ffff in vlan 112 is flapping between port Fa3/0/46 and port Gi3/0/1
Apr 15 16:03:22: %SW_MATM-4-MACFLAP_NOTIF: Host 00ff.ffff.ffff in vlan 112 is flapping between port Fa3/0/46 and port Gi3/0/1
Apr 15 16:03:31: %SW_MATM-4-MACFLAP_NOTIF: Host 00ff.ffff.ffff in vlan 112 is flapping between port Gi3/0/1 and port Fa2/0/46
Apr 15 16:04:03: %SW_MATM-4-MACFLAP_NOTIF: Host 00ff.ffff.ffff in vlan 112 is flapping between port Fa3/0/46 and port Gi3/0/1
Apr 15 16:04:34: %SW_MATM-4-MACFLAP_NOTIF: Host 00ff.ffff.ffff in vlan 112 is flapping between port Fa2/0/46 and port Gi3/0/1
Apr 15 16:04:41: %SW_MATM-4-MACFLAP_NOTIF: Host 00ff.ffff.ffff in vlan 112 is flapping between port Gi3/0/1 and port Fa2/0/46
Apr 15 16:05:05: %SW_MATM-4-MACFLAP_NOTIF: Host 00ff.ffff.ffff in vlan 112 is flapping between port Fa2/0/46 and port Gi3/0/1
Apr 15 16:05:13: %SW_MATM-4-MACFLAP_NOTIF: Host 00ff.ffff.ffff in vlan 112 is flapping between port Gi3/0/1 and port Fa3/0/46
sh spanning-tree vlan 112
VLAN0112
Spanning tree enabled protocol rstp
Root ID    Priority    8192
             Address     001e.13c1.5a70
             Cost        3004
             Port        109 (GigabitEthernet3/0/1)
             Hello Time   2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority    49264 (priority 49152 sys-id-ext 112)
             Address     001f.261c.1d80
             Hello Time   2 sec Max Age 20 sec Forward Delay 15 sec
             Aging Time 300
UplinkFast enabled but inactive in rapid-pvst mode
Interface        Role Sts Cost      Prio.Nbr Type
Fa2/0/46         Desg FWD 3019      128.104 P2p
Fa1/0/46         Desg FWD 3019      128.50   P2p
Gi3/0/1          Root FWD 3004      128.109 P2p
Fa3/0/46         Desg FWD 3019      128.158 P2p
Fa3/0/47         Desg FWD 3100      128.159 P2p
Fa3/0/48         Desg FWD 3019      128.160 P2p

ASAK Mohammed,
There are lots of thread discussing about this, you should do a search before creating a new post.
Anyway, this is how you approach these types of flapping:
1. Is the the given MAC flapping in the log flapping only 1 time or you see it multiple times over a reasonobly short time?
   If you see it only once or once every 2-3 hours this might be not an issue worth being investigated. Sporadic one time flapping are expected in L2 broadcast domain.
If you see it often continue to step 2.
2. Identify and locate the flapping mac in vlan 125: 3270.990a.a504
Is the mac of a dual-homes server using some kind of load balancing algorithm (active/active) for which the same address is used from both NICs?
If yes, the message is not and issue but just an indication. Fix this type of LB (make it active/standby or make sure the server uses 2 different mac addresses, one per NIC) or if it is not possible leave it like this.
3. Is the MAC a the wireless NIC of a PC?
Make sure that the user was not moving from one AP to another (flapping is normal in this case)
4.
See if you have increasing TCN's and check if they are coming from the same interface.
From this point on you keep on troubleshooting STP until you find the offending link (likely going up and down) or the switch. You also need to check if STP in vlan112 is coherent with the actual L2 topology you have.
=====================================================
2- Some more details information which might be helpfull to you.
http://www.cisco.com/en/US/products/hw/switches/ps663/products_tech_note09186a
00801434de.shtml#subtopic1k
Problem
The switch generates %SYS-3-P2_ERROR: Host xx:xx:xx:xx:xx:xx is flapping
between ports? messages, where xx:xx:xx:xx:xx:xx is a MAC address.
Description
This example shows the console output that you see when this error occurs:
%SYS-4-P2_WARN: 1/Host 00:50:0f:20:08:00 is flapping between port 1/2 and port
4/39
Use the steps and guidelines in this section in order to understand and
troubleshoot the cause of this error message.
The message indicates that your Catalyst 4500/4000 switch has learned a MAC
address that already exists in the content-addressable memory (CAM) table, on
a port other than the original one. This behavior repeatedly occurs over short
periods of time, which means that there is address flapping between ports..
If the message appears for multiple MAC addresses, the behavior is not normal.
This behavior indicates a possible network problem because the MAC addresses
move quickly from one port to another port before the default aging time. The
problem can be looping traffic on the network. Typical symptoms include:
·        High CPU utilization
·        Slow traffic throughout the network
·        High backplane utilization on the switch
For information on how to identify and troubleshoot issues with spanning tree,
refer to Spanning Tree Protocol Problems and Related Design Considerations
<http://www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00800
951ac.shtml> .
If the error message appears for one or two MAC addresses, locate these MAC
addresses in order to determine the cause. Issue the show cam mac_addr command
in order to identify from where these MAC addresses have been learned. In this
command, mac_addr is the MAC address that the error reports as flapping.
After you determine between which ports this MAC address is flapping, track
down the MAC address. Connect to the intermediate devices between your
Catalyst 4500/4000 and the device that has the problem MAC address. Do this
until you are able to identify the source and how this device connects to the
network.
Note: Because the MAC address is flapping between two ports, track down both
of the paths.
This example shows how to track both of the paths from which this MAC address
has been learned:
Note: Assume that you have received this message and you have begun to
investigate it.
%SYS-4-P2_WARN: 1/Host 00:50:0f:20:08:00 is flapping between port 1/2 and port
4/39
In order to track down how this MAC address was learned from both ports,
complete these steps:
1.     Consider port 1/2 first, and issue the show cam dynamic 1/2 command.
If you see the MAC address 00:50:0f:20:08:00 in the list of the MAC addresses
that have been learned on this port, determine if this is a single host that
is connected or if there are multiple hosts that are registered on that port.
2.     On the basis of whether there is a single or multiple hosts,
investigate the device:
o   If there is a single host (00:50:0f:20:08:00) that is connected, check the
other port that is registered and see if the host is dually attached to the
switch.
In this example, the other port is port 4/39.
o   If the host has connections to other devices that can eventually lead back
to this switch, try to track down the intermediate devices.
With Cisco devices, issue the show cdp neighbors mod/port detail command. The
output provides information about intermediate devices.
Here is sample output:
Cat4K> (enable) show cdp neighbors 1/2 detail
Port (Our Port): 1/2
Device-ID: brigitte
Device Addresses:
IP Address: 172.16.1.1
Novell address: aa.0
Holdtime: 171 sec
Capabilities: ROUTER
Version:
Cisco Internetwork Operating System Software
IOS (tm) 2500 Software (C2500-JS-L), Version 12.0(7)T, RELEASE SOFTWARE (fc2)
Copyright (c) 1986-1999 by cisco Systems, Inc.
Compiled Mon 06-DEC-99 17:10 by phanguye
Platform: cisco 2500
Port-ID (Port on Neighbors's Device): Ethernet0
VTP Management Domain: unknown
Native VLAN: unknown
Duplex: half
System Name: unknown
System Object ID: unknown
Management Addresses: unknown
Physical Location: unknown
Cat4K> (enable)
3.     Establish a Telnet session with the device and follow the path of the
MAC address.
In this example, the IP address is 172.16.1.1.
Repeat the procedure for all MAC addresses that the error message reports as
flapping.
4.     Create a simple diagram of the source device with that MAC address and
of the physical connections (the Catalyst 4500/4000 ports) from which and to
which this MAC address is flapping.
The diagram enables you to determine if this is a valid port and path for your
network layout.
If you verify that both ports on which the MAC address is flapping provide a
path toward that network node, there is a possibility that you have a
spanning-tree failure issue. Refer to Spanning Tree Protocol Problems and
Related Design Considerations
<http://www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00800
951ac.shtml> in order to isolate and troubleshoot this loop.
In large networks in which multiple hosts from multiple vendors are
interconnected, difficulty arises as you try to track down the host with use
of just the MAC address. Use the search utility for the IEEE OUI and
Company_id Assignments <http://standards.ieee.org/regauth/oui/index.shtml> in
order to track down these MAC addresses. This list is the front end of the
database where IEEE has registered all MAC addresses that have been assigned
to all vendors. Enter the first three octets of the MAC address in the Search
for: field of this page in order to find the vendor that is associated with
this device. The first three octets in the example are 00:50:0f.
These are other issues that can cause this message to appear:
·        Server NIC redundancy problem?There is a server with a dual-attached
NIC that misbehaves and does not follow the standards. The server uses the
same MAC address for both ports that connect to the same switch.
·        Hot Standby Router Protocol (HSRP) flapping?Flapping HSRP can cause
these messages to appear in the Supervisor Engine console. If you notice that
HSRP implementation in your network is unstable, refer to Understanding and
Troubleshooting HSRP Problems in Catalyst Switch Networks
<http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a00800
94afd.shtml> in order to resolve the problem.
·        EtherChannel misconfiguration?A misconfigured EtherChannel connection
can also cause these symptoms. If ports that the flapping message reports are
members of the same channel group, check your EtherChannel configuration and
refer to Understanding EtherChannel Load Balancing and Redundancy on Catalyst
Switches
<http://www.cisco.com/en/US/tech/tk389/tk213/technologies_tech_note09186a00800
94714.shtml> in order to troubleshoot the configuration.
·        Host reflects packets back onto the network?The reflection of packets
back onto the network by a host can also cause flapping. Typically, the root
cause of this packet reflection is a broken NIC or any failure of the physical
interface of the host that is connected to the port.
If the reflection of packets by the host is your root cause, obtain a sniffer
trace and examine the traffic that goes to and from the ports on which the
messages have appeared. If a host reflects packets, you typically see
duplicate packets in the trace. The duplicate packets are a possible symptom
of this flapping of the MAC address.
Refer to Configuring SPAN and RSPAN
<http://www.cisco.com/en/US/docs/switches/lan/catalyst4000/6.3and6.4/configura
tion/guide/span.html> for details on how to configure a port for use with a
sniffer.
·        Software or hardware defect?If you have tried to troubleshoot the
flapping message with the instructions in this section but you still notice
the issue, seek further assistance from Cisco Technical Support
<http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html> . Be
sure to mention and provide documentation of the information that you have
collected while you followed the steps. This information makes further
troubleshooting quicker and more efficient.
HTH
REgards
Inayath
*Plz rate all usefull posts.

Host flapping between port

Hi All,
I have spent quite long to fix the flapping port, How to fix this problem?
---------from the log------------
Nov 15 11:47:52 CCT: %C4K_EBM-4-HOSTFLAPPING: Host 00:13:E8:73:5A:47 in vlan 66 is flapping between port Gi1/13 and port Fa3/12
Nov 17 12:11:12 CCT: %PORT_SECURITY-2-PSECURE_VIOLATION: Security violation occurred, caused by MAC address 000e.5308.f3bd on port FastEthernet3/4.
Nov 17 12:31:48 CCT: %C4K_EBM-4-HOSTFLAPPING: Host 00:1D:E0:8B:8E:99 in vlan 62 is flapping between port Fa3/10 and port Gi1/17
Nov 17 15:05:17 CCT: %C4K_EBM-4-HOSTFLAPPING: Host 00:16:6F:60:DE:AB in vlan 62 is flapping between port Gi1/15 and port Fa3/10
Nov 17 18:40:16 CCT: %C4K_EBM-4-HOSTFLAPPING: Host 00:1B:9E:AB:C3:F7 in vlan 62 is flapping between port Gi1/17 and port Fa3/10
Nov 17 20:35:19 CCT: %C4K_EBM-4-HOSTFLAPPING: Host 00:16:6F:60:D5:8E in vlan 66 is flapping between port Gi1/13 and port Fa3/12
-- cut --
Thanks

We had multiple redundant links between switches, and then the servers were connected to each switch. It was a mess. I removed many of the links and left only two.
Do you have all of your SSIDs in the same VLANs across the ports? In other words, do you have it like:
guest - vlan 100
secured - vlan 105
If that's the case, and the access points are all configured this way, you shouldn't see a flapping I wouldn't think. I would verify that it's an access point in these ports that are flapping, and then work backwards from there.
--John

2960s Link-Flap issue.

I've recently had a few ports on 48 way 2960s go in to err mode.
Bit of digging and they have been disabled due to link flapping. I disconnected the devices to check cables etc and all checked out. I've since repatched in another stacked 2960s without issue.
The switch with the issue seems to have got progressively worse, what started with a couple of ports now has gone to gi1/0/33-40 are now disabled due to flapping.Even though none of the ports are now in use. I've restarted the switch just in case it was having a special moment but no luck.
show log displays
000062: Dec 17 19:30:19.490: %PM-4-ERR_DISABLE: link-flap error detected on Gi1/0/40, putting Gi1/0/40 in err-disable state
Switch attempts to recover after 300s with no luck. Just to confirm there is nothing patched in to the effected ports.
Any suggestions or is it it RMA time.

Hello Leo Laohoo,
Thank you for the quick reply,
I mentioned earlier in the thread that I've unpatched and tested the cables and have moved the devices in to another switch all working fine. Ports also have recover on too, and still are in error mode.
Below is test result on one port which shows fine.
Interface Speed Local pair Pair length        Remote pair Pair status
Gi1/0/33 auto Pair A     0    +/- 0 meters N/A         Normal
                Pair B     0    +/- 0 meters N/A         Normal
                Pair C     0    +/- 0 meters N/A         Normal
                Pair D     0    +/- 0 meters N/A         Normal
Regards
Rob

NX2-5K-60.8 %FWM-6-MAC_MOVE_NOTIFICATION: Host 0025.64ee.f160 in vlan 1 is flapping between port Po10 and port Po15

hi All ,
we received multiples port channel flapping alerts as below mention .the nx5K os :- System version: 5.2(1)N1(3)..
we connected two NX-5 CONNECTED THROUGH VPC FROM THAT WE CONNECTE 4849 SWITCH.Please suggest what should i do to resolve the issue.
Thanks
Sandeeps
NX2-5K-60.8 %FWM-6-MAC_MOVE_NOTIFICATION: Host 0025.64ee.f160 in vlan 1 is flapping between port Po10 and port Po15
NX2-5K-60.8 %FWM-6-MAC_MOVE_NOTIFICATION: Host 2c76.8ad0.e56d in vlan 1 is flapping between port Po11 and port Po10
-NX2-5K-60.8 %FWM-6-MAC_MOVE_NOTIFICATION: Host 2c76.8ad0.e56d in vlan 1 is flapping between port Po10 and port Po11
-NX2-5K-60.8 %FWM-6-MAC_MOVE_NOTIFICATION: Host 8c6a.e403.159d in vlan 1 is flapping between port Po10 and port Po29
NX2-5K-60.8 %FWM-6-MAC_MOVE_NOTIFICATION: Host 2c76.8ad0.e56c in vlan 1 is flapping between port Po11 and port Po10

You need to trace this mac address: - 00ab.cdef.0123 and check if this has dual nic card if yes then check if nic teaming is configured correctly ...then shut down one of the link and see if you are learning the same mac address on two different ports?
HTH

Why my new Mac mini DVI dual link mini display port adapter doesn't work with my 30"display (LG W3000H)?

Hello There
Can any of you advise on the below? Tried to connect Mac mini with a 30" display through a DVI dual link mini display port adapter. For the first try Mac mini go connected to the display, then i've chosen the highest resolution (2560x1600, native) and right at that moment they got disconected. Since then the display stays black. What can be the issue, is it possible DVI dual link mini display port adapter is not compatible with 30"display (LG W3000H)? It works with DVI male-male cable plus DVI HDMI adapter as long as the resolution stays under 1280x800. Any idea is much appreciated.
Thank you, Vera

Hi,
I can report that my Mac Mini Intel Duo connected instantly and without even having to set it up (on the first try) with my 1366x768 native resolution DELL 50" Plasma Display. It's so beautiful that I just want to stand there and fondle my HDTV as I drool haplessly like Homer Simpson with a doughnut in his mouth. Seriously, no problems.... guess I bought the right cable (ebay).
Before you buy a Duo, make sure you're aware of the airport and bluetooth issues that so many (maybe everyone who tries to use them together) are having. It seems that bluetooth interferes with airport, or maybe the other way around. Anyway, it's messed up. Also, Airport reception is generally VERY poor with the new Intel Mac Mini.
Despite these things, I still love mine (I now have 2 base stations and an airport express for my powerhouse wireless needs, and an external DLink bluetooth-2-USB dongle solved the bluetooth/airport issues... in my case).
FWIW,
awk
667-MHz Ti PowerBook G4. Mac OS X (10.3.9)

Connect to Dual-Link DVI-D port on monitor using DVI-D to VGA adapter -- getting no signal

I have a T400. I am trying to connect to a dual-link DVI-D port on my LG monitor via the VGA port on my T400 laptop. I bought a DVI-D to VGA adapter, but I am getting no signal.
Do I need some other method or adapter or cable? Monitor works fine for VGA to VGA connection.
Solved!
Go to Solution.

I happened onto this thread while searching for a way to connect my T400 to my wife's 27" iMac. What I learned thus far is that Atlona makes a device (AT-DP400) that will convert dual link DVI to Mini DisplayPort. But Atlona says that one's graphic card must support 2560x1440. The T400 doesn't have a DVI out (nor does my current docking station), but it sounds like one can get a docking station that does. But that won't help if my card won't support 2560x1440. So are you saying that there is no way I will be able to use the 27" iMac as a monitor for the T400?
-Rob

Getting Linker errors while porting InDesign CC plugin code to InDesign CC 2014

Hello,
I am getting following linker errors during porting of plugin code from InDesign CC to InDesign CC 2014
> PlugInStatics.obj : error LNK2019: unresolved external symbol "class boost::system::error_category const & __cdecl boost::system::generic_category(void)" (?generic_category@system@boost@@YAAEBVerror_category@12@XZ) referenced in function "void __cdecl boost::system::`dynamic initializer for 'posix_category''(void)" (??__Eposix_category@system@boost@@YAXXZ)
> PlugInStatics.obj : error LNK2019: unresolved external symbol "class boost::system::error_category const & __cdecl boost::system::system_category(void)" (?system_category@system@boost@@YAAEBVerror_category@12@XZ) referenced in function "void __cdecl boost::system::`dynamic initializer for 'native_ecat''(void)" (??__Enative_ecat@system@boost@@YAXXZ)
I am using following environment :
OS : Windows 7 SP1 (64bit)
Visual Studio : VS 2013 with platform tool set = Visual Studio 2010 (v100)
InDesign SDK : InDesign CC 2014 plugin SDK (070)
Boost Libraries : 1.55
I have added external boost library paths in visual studio -> Linker properties -> Additional Library paths, still above linker errors persists, can someone help ?
Thanks,
-Harsh.

Hello Bartek,
Your answer resolved similar linker errors I faced while porting InDesign plug-ins from CC to CC 2014.
I added the macro - BOOST_SYSTEM_NO_DEPRECATED to the Preprocessor Definitions in VS 2012 SP4 and the build succeeded.
The second option of adding the macros - BOOST_ALL_DYN_LINK;BOOST_REGEX_USE_CPP_LOCALE;BOOST_REGEX_RECURSIVE;BOOST_HAS_ICU=1;BOOST_ FILESYSTEM_VERSION=3;BOOST_CHRONO_HEADER_ONLY;BOOST_SIGNALS_NO_DEPRECATION_WARNING; did not work for me.
Can you explain why this linker error showed up? And how the macro solved it?
Thanks,
Vijayasri

- No link between IOM port 3/2/2 and fabric interconnect B:1/18

Specifically I'm trying to find out what the 3/2/2 means in - No link between IOM port 3/2/2 and fabric interconnect B:1/18

This from the fault reference guide:
"No link between IOM port [chassisId]/[slotId]/[portId] and fabric interconnect [switchId]:[peerSlotId]/[peerPortId]"
http://www.cisco.com/en/US/docs/unified_computing/ucs/ts/faults/reference/UCS_SEMs.html#wp1306388

%SW_MATM-4-MACFLAP_NOTIF: Host 3270.990a.a504 in vlan 125 is flapping between port Fa0/21 and port Gi0/1

%SW_MATM-4-MACFLAP_NOTIF: Host 3270.990a.a504 in vlan 125 is flapping between port Fa0/21 and port Gi0/1
Please suggest me how can i fixed it ?

Sachin,
those are by no mean errors! they are informative messages which, in some circumnstances, can represent issues.
As I wrote in step 1, very first step is to determine how often you see a given mac flapping between 2 interfaces.
How often do you see that?
I am reiterating the concept as, according to your description, what you see can be pretty normal in your scenario.
Maybe it is worth clarifying that the message only means that a frame learned via Fa0/21 is now seen from Gi0/1. In static and stable networks traffic from a given host should always come from the same path and therefore should not be re-learned from another port. Every time a switch notices that a MAC which was previously learned from a port is now seen and learned from another one it trigeers that message as this behaviour might represent an ongoing L2 loop, but as I wrote this is not always true.
However since you have an AP connected to Fa0/21 it is likely that a host with mac 32:70:99:0a:a5:04 was connected to it for some time, and then it browsed and connected to another AP. This is why your switch started seeing traffic from that mac coming from a distribution/switch switch connected to gi0/1, as the l2 path changed.
I was not able to find the vendor of 32:70:99 as this is not an assigned OUI. Also since this is an unicast locally administered address it could besome kind of application/protocol using it.
What you have to do is
- Check in stable condition where this mac is learned from, that is following it switch by switch until you find the port. Since it comes from an AP most likely it is learned from the radio antenna of the AP. You need to check wheter this is an addressed learned over the radio or local to your motorola AP.
- Once you identify you you will be able to udnerstand why it flapped.
Having said that you will understand that the majority of your questions don't have too much sense now.. however
1. They are messages and not errors. see above why you see them.
2. Check on APs mac address table and see where that address is learned from. I don't know if your AP has some kind of mac notification feature logging all the changes. This is somethign you have to work out yourself. The focus is to first understand what is the mac address in the first place.
3. This question means nothing. If the flapping address is the mac of some kind of wireless NIC (laptop, smartphone etc.) you cannot prevent users from moving from a site to another. This is waht wireless networks are about. Still, sporadic flapping messages are expected as they just represent how the network is being utilized and you cannot fix them as there is nothing to fix.
4. The message itself has no impact. If they represent users moving from a wireless location to another there is no harm. If they are continuous and are not related to wireless networks they might indicate a L2 loop. To verify that you need to look for other symptoms which normally are associated with l2 loops: high cpu on the switches in the path, interface drops (on l2 and l3 interface, if present), increasing STP TCNs (not all the times), unstable STP topology, unstable control plane, similar logs logged in all/many switches. Some or all symptoms can occurr.
5. plenty.... google it and spend some time reading the docs you find
Riccardo

%SW_MATM-4-MACFLAP_NOTIF: Host 4025.c225.d9f0 in vlan 16 is flapping between port Gi1/0/27 and port Gi1/0/12

Hi all ,
we have a network with CORE4507 access 2960x24port+4portSFP
CORE configured to allowed vlan all till access switch SFP interface Gi1/0/27 when i show log to switch i found error below.
\%SW_MATM-4-MACFLAP_NOTIF: Host 4025.c225.d9f0 in vlan 16 is flapping between port Gi1/0/27 and port Gi1/0/12
In access switch port Gi1/0/12 and port Gi1/0/24 is configured as trunk and WAP121 wirelessAP is connected tow SSID,s are configured SSID1=VLAN 10 SSID2=VLAN16
interface GigabitEthernet1/0/12
switchport trunk allowed vlan 10,16
switchport mode trunk
interface GigabitEthernet1/0/24
switchport trunk allowed vlan 10,16
switchport mode trunk
Any Help
Regards

Hello Akash,
Thanks for repley port 1/0/27 is configured as trunk and allowed Vlan All
interface GigabitEthernet1/0/27
switchport mode trunk
this is sh cdp ne
V35#sh cdp neighbors
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone,
D - Remote, C - CVTA, M - Two-port Mac Relay
Device ID Local Intrfce Holdtme Capability Platform Port ID
CORE1 Gig 1/0/27 176 R S I WS-C4507R Gig 1/23
Regards

Host Flapping Between Port Channel

Hi,
I have 2 VSS Pair (4X6509E) Switch. First VSS Pair is configured as Server Core and Second VSS Pair is configured as LAN Core. There is a port channel Port 10 with 4Port configured between Server and LAN Core. We have also couple Wireless LAN Controllers (5508) Connected to Server Core. PortChannel 25 from Wireless LAN Controller 1 and Portchannel 26 from Wireless LAN Controller 2. (Only 1 controller will be acitve at a time)
My issue is that am getting a MAC Flapping error between Port Channel 25 and Port Channel 10. I tried cleard the MAC entry and from ARP found the IP is LAN Core SVI.
"%MAC_MOVE-SW1_SP-4-NOTIF: Host ec30.91e1.2f80 in vlan 80 is flapping between port Po26 and port Po10"
show arp#
Internet 10.50.200.254          23   ec30.91e1.2f80 ARPA   Vlan50
VLAN 80 is WIreless Guest VLAN.
Please guide me in isolating the issue.
Toplolgy file is attached and also 6509-E is ruuning IOS "s72033-ipservicesk9_wan-mz.122-33.SXI3.bin"

SERVER-CORE
interface Port-channel10
switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 50
switchport trunk allowed vlan 2-4094
switchport mode trunk
no mls qos channel-consistency
interface TenGigabitEthernet1/6/1
switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 50
switchport trunk allowed vlan 2-4094
switchport mode trunk
channel-protocol pagp
channel-group 10 mode desirable non-silent
nterface TenGigabitEthernet1/6/3
switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 50
switchport trunk allowed vlan 2-4094
switchport mode trunk
shutdown
channel-protocol pagp
channel-group 10 mode desirable non-silent
interface TenGigabitEthernet2/6/1
switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 50
switchport trunk allowed vlan 2-4094
switchport mode trunk
channel-protocol pagp
channel-group 10 mode desirable non-silent
interface TenGigabitEthernet2/6/3
switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 50
switchport trunk allowed vlan 2-4094
switchport mode trunk
channel-protocol pagp
channel-group 10 mode desirable non-silent
interface Port-channel25
description *****Connected to QOC-WLC1*****
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
interface GigabitEthernet1/1/3
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 25 mode on
interface GigabitEthernet1/1/4
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 25 mode on
interface Port-channel26
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
interface GigabitEthernet2/1/3
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 26 mode on
interface GigabitEthernet2/1/4
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 26 mode on
SERVER-CORE#show etherchannel summary
Group Port-channel Protocol    Ports
------+-------------+-----------+-----------------------------------------------
1      Po1(RU)          -        Te1/5/4(D)     Te1/5/5(P)
2      Po2(RU)          -        Te2/5/4(D)     Te2/5/5(P)
10     Po10(SU)        PAgP      Te1/6/1(P)     Te1/6/3(D)     Te2/6/1(P)     Te2/6/3(P)
25     Po25(SU)         -        Gi1/1/3(P)     Gi1/1/4(P)
26     Po26(SU)         -        Gi2/1/3(P)     Gi2/1/4(P)

Host [MAC] vlan [x] is flapping between port [x/x/x] and port [x/x/x]

Hi all, I have two switches connected in cross-3750X stack into a single SW 6500., But I get the following error appears.
18w2d: %SW_MATM-4-MACFLAP_NOTIF: Host 0012.950a.9952 in vlan 10 is flapping between port Gi5/0/46 and port Gi6/0/44
What can i do?
Thank you very much¡¡.

The configuration on the port channel is that all the port must be with the equal configuration :
For example :
interface Port-channel1
description IDC-TO6500 - 192.168.0.12
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,54,136,192,432
switchport mode trunk
speed 100
duplex full
interface GigabitEthernet1/0/1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,54,136,192,432
switchport mode trunk
speed 100
duplex full
channel-protocol lacp
channel-group 1 mode active
interface GigabitEthernet1/0/2
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,54,136,192,432
switchport mode trunk
speed 100
duplex full
channel-protocol lacp
channel-group 1 mode active
The same configuration is on the 3750 :
interface Port-channel1
description IDC-TO3750 - 192.168.0.12
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,54,136,192,432
switchport mode trunk
speed 100
duplex full
interface GigabitEthernet1/0/1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,54,136,192,432
switchport mode trunk
speed 100
duplex full
channel-protocol lacp
channel-group 1 mode active
interface GigabitEthernet1/0/2
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,54,136,192,432
switchport mode trunk
speed 100
duplex full
channel-protocol lacp
channel-group 1 mode active

Link-flap faulty port

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