Cisco Switching/Routing :: Error Message Ports Flapping On 3750 Stack

Aug 27, 2012

I am receiving the following error message on a Cisco 3750 switch stack. Need troubleshooting this error message.

00:03:13: %SW_MATM-4-MACFLAP_NOTIF: Host 00d0.7400.2730 in vlan 600 is flapping between port Gi2/0/3 and port Gi2/0/2

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Cisco Switching/Routing :: 3750 - VLAN Flapping Error Message

Sep 15, 2012

I recently upgraded my network to have two 3750x core, one interface on the Cisco is connecting to a Net gear switch via a fiber converter. I am keep getting the vlan flapping error message in my log as below.
 
003396: Sep 17 01:46:16.328: %SW_MATM-4-MACFLAP_NOTIF: Host 5c0e.8ba7.0a5c in vlan 2 is flapping between port Gi2/0/15 and port Gi2/0/13
003397: Sep 17 01:46:19.843: %SW_MATM-4-MACFLAP_NOTIF: Host 5c0e.8ba7.0a5c in vlan 2 is flapping between port Gi2/0/15 and port Gi2/0/13
003400: Sep 17 01:49:58.769: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/17, changed state to down
[Code] .....
 
After my research i think this is a looping issue but I'm unsure how to address it.

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Cisco Switching/Routing :: 3750 Stack To Upstream ISP Separate Switches - MAC Flapping

Mar 11, 2012

I have an issue with a Cisco 3750 switch stack which is connected to two seperate upstream Cisco 3750's which are administered by an ISP.  The ISP is experiencing MAC address flapping from one of my VLAN SVI's i am using to route traffic upstream
 
[code]...
 
As you can see I utilise a VLAN SVI to route traffic to the upstream 1.1.1.2 (illustration only) IP.  As per the diagram of the topology attached, the ISP is receiving a MAC address flapping error confirming the SVI MAC address from my switch stack is being learnt on the trunk port connecting switch 1 and switch 2, and also the port (Gi1/0/48) directly connected to my switch stack. As these are all Layer 2 links essentially being passed upstream and then connected between the two ISP switches, we have a 3 way triangular loop formed.
 
If I was to remove the port channel configuration from the two ports associated with the VLAN SVI, am i right in suggesting this would still form a layer 2 loop?  The two ports would still be a member of the SVI VLAN, and it is the VLAN MAC address which is being learnt by the two ISP switches on different interfaces.

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Cisco Switching/Routing :: 3750 - Error Message While IOS Upgrade

Jan 6, 2013

Have a small stack of two 3750 routers.  Get the following error message every few secounds:
 
%STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 1 has changed to state DOWN
%STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 1 has changed to state UP
 
Now I replaced the stacking cables but no joy. It was ok for an hr or so but then the error messages popped up again. Also random links on this stack back to access layer user switches have been going up and down randomly. So I have decided to take the next step and upgrade the IOS.
 
 Although when I try and copy a new IOS I get the following error:
 
%Error writing flash:/c3750-ipservicesk9-mz.122-55.SE6.bin (No space left on device)
 
Seems this image is 130MB while the image that is currently on it is 74MB and free space is 54MB. How do I get the image onto the router? If I delete the current image from flash will that cause the router to stop functioning?
 
Also I noticed there seems to be more than one flash directory. See below:
 
copy tftp: ?
  flash1:         Copy to flash1: file system
  flash2:         Copy to flash2: file system
  flash:          Copy to flash: file system
  null:           Copy to null: file system
  nvram:          Copy to nvram: file system
  running-config  Update (merge with) current system configuration
  startup-config  Copy to startup configuration
  system:         Copy to system: file system
  vb:             Copy to vb: file system
 
The current router image seems to be in flash1 and flash 2 also. Could I delete the image from flash1. Upload it there and then boot the router from flash1?

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Cisco Switching/Routing :: 3750 - Can Take (4) Ports From Each Switch In Stack And LACP Together

Jun 5, 2012

I have a Cisco 3750G-48PS Running IOS 12.2(40) and was wondering how many physical ports are supported in an LACP Configuration.  Is it 4 or 8 ports in a single switch.
 
If I have a dual 3750 stacked together,  and I want to configure (8) port LACP, Can I take (4) ports from each switch in the stack and LACP together.

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Cisco Switching/Routing :: 3750 SNMP Second Stack Is Showing Error

Mar 5, 2013

We have a stack setup with 2 C3750x-12s and 5 C3750x-48p switches.  We have two of these stacks.  One is working and responding with snmp just fine.  Our second one is showing the errors in the logThe only difference i see between the two stacks right now are the sw versions.

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Cisco Switching/Routing :: WS-C2960S-24TS-L / Mac Flapping On Stack?

Feb 27, 2012

We have two switches WS-C2960S-24TS-L running in stack with running IOS c2960s-universalk9-mz.122-55.SE3.We have connected two checkpoint devices on Gi1/0/24 and Gi2/0/24 with a simple configuration:
 
interface range GigabitEthernet1/0/24, gi2/0/24
switchport access vlan x
switchport mode access
spanning-tree portfast
 
On the devices log we get the following message:

%SW_MATM-4-MACFLAP_NOTIF: Host 0000.0000.fe21 in vlan x is flapping between port Gi2/0/24 and port Gi1/0/24
 
The mac-address 0000.0000.fe21 is not found on any checkpoint interface. "Show mac-address int gi1/0/24 or gi2/0/24" does not show the correct mac-address of the checkpoint interface connected to the port, but instead shows 0000.0000.fe21.Is there a bug in the IOS, something wrong with the switch config or does it have something to do with the checkpoint config?

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Cisco Switching/Routing :: 4500 / Flapping Between Ports?

Jun 27, 2012

We have been receiving these notifications on one of our core.
 
Jun 28 12:54:01: %MAC_MOVE-SP-4-NOTIF: Host b407.f9c3.3c51 in vlan 56 is flapping between port Po5 and port Te7/2
Jun 28 12:54:01: %MAC_MOVE-SP-4-NOTIF: Host 145a.05c8.0ed3 in vlan 802 is flapping between port Te7/2 and port Po5
Jun 28 12:54:01: %MAC_MOVE-SP-4-NOTIF: Host 9463.d129.546a in vlan 56 is flapping between port Gi2/9 and port Po5
Jun 28 12:54:01: %MAC_MOVE-SP-4-NOTIF: Host 3c43.8ef3.7448 in vlan 56 is flapping between port Gi2/9 and port Po5
Jun 28 12:54:01: %MAC_MOVE-SP-4-NOTIF: Host 000e.35eb.25ae in vlan 66 is flapping between port Po5 and port Te7/2
 
PO5 goes to our primary wireless controller.  Gi2/9 goes to a Cisco 4500 switch that also has a PO5 on it for a failover lan controller and TE7/2 is another core switch.
 
These mac-address all seem to point to PO 5 which is the port channel assigned to Wireless Controller interfaces.
 
How do I determine if this is a spanning-tree loop?  No ports are err-disabled. 

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Cisco Switching/Routing :: 4506e Host Flapping Between Ports

Dec 6, 2012

Two days back my entire network was behaving in unusual ways.When is connect to core switc(4506e) through console. [code]

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Cisco Switching/Routing :: 2960 Switch Ports Flapping

Feb 4, 2013

I have a 2960 switch and every then and now the ports are flapping, while i was on console i saw ports going down and coming up...when the ping to machine ip addresses timed out the port status on switch was still up...no errors collisions seen on sw port. Below is sh int when the port was flapping
 
[code]...

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Cisco Switching/Routing :: TCAM Write Failure Message On 3750x Stack

May 29, 2013

I have a stack of 3750x switches running 15.0 (2) SE2 IOS.   When I reload the switch stack, I am seeing the following message in the logs: IPv6 user port trust TCAM write failed.

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Cisco Switching/Routing :: 3750E-24PD-S Stack Member Fan Failed Syslog Message

Aug 6, 2012

I have a pair of 3750E-24PD-S stacked together, it seems after stacked together the stacked switch always flood the console screen with these messages which are not true: [code] Switch-2 is the stack member, Switch-1 is the stack master. The RPS fan failed refers to RPS2300 or the internal power supply of 3750E? Even when I turned on the RPS2300 the stacked switch still display the messages. Also I have two RPS2300 serving stack master and stack member respectively both RPS2300 were switched off why the messages only refer to Switch-2 and not Switch-1? [code]

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Cisco Switching/Routing :: Message Error With C3750-I5-M

Jan 2, 2008

I have this system: IOS (tm) C3750 Software (C3750-I5-M), Version 12.1(19)EA1d, RELEASE SOFTWARE (fc1
 
An error appear in console (many times in one minute):
 
Jan  3 16:25:37: %LINK-3-BADMACREG: Interface StackPort1, non-existent MACADDR registry for link 0
-Process= "<interrupt level>", ipl= 4
-Traceback= 20A364 187F04 58D6FC 58B950 2D7CE0 2E00C8 2E2BEC 2E2F24 2B0BF8
 
What is the problem? What is the solution?

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Cisco Switching/Routing :: Error Message On CAT4507

May 8, 2011

I've taken 2 4507's fresh out of the box running CAT4500E-ENTSERVICESK9-MZ.122-53.SG2.BIN which was upgraded from CAT4500E-IPBASEK9-MZ.122-53.SG2.BIN
 
I'm getting constant %C4K_S2W-4-WRITECALENDARERR:  Calendar write operation Failed errors on the console.  I was also getting them on the original IOS version.
 
Anything I've seen say's to ignore them but their very frequent filling up the logs.
 
There's very little return on google and no bugs to report on Cisco?

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Cisco WAN :: 3750 ME Switch Getting Error Message After Restart

Aug 28, 2011

I am using 3750 ME switch and we have restarted the switch 7 weeks age and we are getting error message, we are using MPLS / BGP in this switch.

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Cisco WAN :: 3750 Vlan Creation Error Message

Feb 7, 2011

I have cisco switch model  WS-C3750G-12S-D. It is in transparent mode. I am getting below error message when tried to create new vlan.
 
Proposed configuration exceeds the limit of 1005 VLANs that can be supported on this platform. Reduce the number of VLANs proposed to be within this limit.
 
After deleting few unnecessary vlans, it allowed me to create.
 
3750#sh vtp statusVTP Version                     : running VTP1 (VTP2 capable)Configuration Revision          : 0Maximum VLANs supported locally : 1005Number of existing VLANs        : 959VTP Operating Mode              : TransparentVTP Domain Name                 : VTP Pruning Mode                : DisabledVTP V2 Mode                     : DisabledVTP Traps Generation            : DisabledMD5 digest                      : 0xBC 0xA7 0xEC 0xDE 0x36 0x6C 0x61 0xB4 Configuration last modified by 97.193.17.172 at 0-0-00 00:00:00
 
I confused with terms 'maximum supported vlans' and 'maximum locally supported vlans'. If switch is supporting vlans 1-4094 means it should also allow to create locally. Otherwise how they will pass through the switch trunks without local creation.

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Cisco Switching/Routing :: Nexus 7009 Error Message

May 27, 2013

I have in logs following error message:

%DEVICE_TEST-2-PWR_MGMT_BUS_FAIL: Module 1

Has failed test SpineControlBus 20 times on device Power Mgmt Bus on slot 10 due to error Spine control test failed error number 0x00000002.

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Cisco Switching/Routing :: Ambiguous Error Message On Cat6500 VSS

Nov 15, 2012

I get a unclear log entry in a VSS system.

Me_Kr #1        ME_KR_ERROR_CNT_LTL_PARITY_ERR_ITRP_0_0[01C8] : INTR= 0001 MASK= 0001
Me_Kr #1        ME_KR_ERROR_CNT_LTL_PARITY_ERR_ITRP_0_0[01C8] : INTR= 0001 MASK= 0001
Me_Kr #1        ME_KR_ERROR_CNT_LTL_PARITY_ERR_ITRP_0_0[01C8] : INTR= 0001 MASK= 0001
Me_Kr #1        ME_KR_ERROR_CNT_LTL_PARITY_ERR_ITRP_0_0[01C8] : INTR= 0001 MASK= 0001

[code]....

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Cisco Switching/Routing :: 6500 MSFC2 Strange Error Message

Jun 5, 2011

my MSFC2 sent this strange log message. %DATACORRUPTION-SP-1-DATAINCONSISTENCY: copy error, The error message decoder tool says: "NOT FOUND". The level is "alert".

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Cisco Switching/Routing :: Catalyst 4948 Power Error Message

Dec 20, 2010

We are running a small network business and as funs of ciscos we own a some of the 4948s.We are facing an issue with couple of them as we get the below error message

C4K_CHASSIS-3-INSUFFICIENTPOWERSUPPLIESDETECTED:Insufficient power
supplies present for specified configuration

First thought to replace the power supply didn't actually work as we did that with no result.Power consumption is not an issue as well because all other 4948s work fine with 1 power supply (forgot to mention is 1 power supply in all of them).

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Cisco Switching/Routing :: 2800 - Does Not Boot And Shows Error Message

Sep 8, 2012

I have a Cisco 2800 series and it doesn't boot, only shows this message in the CLI> 

Bad RAM at location 0xA0000304: wrote 0xA0000304, read 0xA0000004
 
What means this? I have to change the RAM?

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TP-Link Dual-Band Wireless :: TL-WDR3600 Forwarding Ports - Getting Error Message?

Apr 5, 2013

Region : UnitedKingdom
Model : TL-WDR3600
Hardware Version : V1
Firmware Version : 3.13.26 Build 130129 Rel.59449n
ISP : Virgin Media Limited

when I forward ports I get the following error message:

Things to note:I have the web GUI running on 8080, because I run a file-server on port 80.

I am using a Virgin media branded router in 'modem mode', this would not cause issues.

I did not do anything to change anything, I went to add an additional port to forward and it didn't work.

I am on a Dynamic IP

After it stopped forwarding, I upgraded firmware to: 3.13.26 Build 130129 Rel.59449n.

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Cisco Switching/Routing :: 6509 / Mac Address Error Message No Entries Present

Dec 6, 2012

I am receiving this error after connecting a copper adapter on a GBIC blade in a 6509. Here are the results from the show Interface.  I am waiting to confirm the device on the other side settings but as far as I see I get UP and Up for protocol and line respectively.
 
GigabitEthernet2/11 is up, line protocol is up (connected)
Hardware is C6k 1000Mb 802.3, address is 0009.11e4.f3ce (bia 0009.11e4.f3ce)
Description: RCPBSDEV
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set

[code]....

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Cisco Switching/Routing :: Nexus 7K Shows Continuous Tacacs Error Message?

Dec 10, 2012

I have Nexus 7K installations in 2 locations. Both of them have multiple VDCs. In default VDC there are continous tacacs error message though tacacs is not configured. The requests are from various public IPs where thsi VDC is not exposed to Internet at all. What would be t he cause of it?
 
%AUTHPRIV-3-SYSTEM_MSG: pam_aaa:Authentication failed for user root from 195.2.219.2
2012 Dec 11 16:25:28 IDC-FBDTB-AMR2-CN7K-01 %AUTHPRIV-3-SYSTEM_MSG: pam_aaa:Authentication failed for user nagios from 67.78.206.226
- sshd[25797]
2012 Dec 11 16:25:34 IDC-FBDTB-AMR2-CN7K-01 %AUTHPRIV-3-SYSTEM_MSG: pam_aaa:Authentication failed for user nagios from 67.78.206.226
- sshd[25799]

[code]....

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Cisco Switching/Routing :: SGE2010 Switches Stack Dropping Ports

Oct 12, 2012

Our environment consits of 4 cisco SGE2010 switches (stacked). I have implemented STP BPDUGUARD and Portfast on all client ports (suspected a loop). And our uplink to the Server DMZ recieves almost all of it's BPDU packets back(is that normal?) The issues lies where we have random ports dropping out - across all stacks for seconds at a time. We get errors/warning such as,Pinging between the DMZ network appears to be fine. Pinging from the client/switch network show packets being dropped quite frequently.All devices are on VLAN1 (I've have researched this and this could be the cause of the issue)

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Cisco Switching/Routing :: Adding 3750 To Stack?

Dec 6, 2011

I have two  3750s stacked and one 3750 standalone all in one data closet. The both have the same versions. I want to combine them to make one stack. How do I force the standalone to be the master? sw 1 priority XX(Higher then the existing stack)? Both the stack and the standalone have management addresses. Would it be ok to delete the stack ip address? That way, the standalone(master's address will be the only management address)?How should I connect the standalone 3750 to the stack? At present, the 3750 stack is connected via a cascade cable going from the stack 1 port of the top switch to the stack 2 port of the bottom switch.

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Cisco Switching/Routing :: 3750 Stack Port

May 19, 2013

I have a stack of 4 3750 Switches.
 
1. WS-C3750G-12S
2. WS-C3750G-12S
3. WS-C3750X-48P
4. WS-C3750X-48P
 
The stack cable connected to Switch 1 Port 1 and Switch 4 Port 2 will not come back online. The logs show that there was a Stack line change. I have replaced the 1 meter Stack cable from Switch 1 to Switch 4 three times and it still does not come back online. This is the part that is interesting.. I have disconnected Port 1 Switch 4 and connected it to Port 2 Switch 4 and then Switch 4 came back online. This made me think Port 2 on Switch 4 was working correctly. Then I disconnected Port 2 Switch 1 and connected it to Port 1 Switch 1 and then Switch 1 came back online.

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Cisco Switching/Routing :: 3750 Stack CPU Utilization?

Feb 20, 2013

i have two cisco 3750 in stack firts, master switch have all swports busy second have only 5 how can i see cpu utilizations of the second switch, and its reasonable to move somme devices from first switch to second for deacreases of cpu and memory utilisatio ns of the master? the stack tehnologies use both cpu as one? or its only for simple management ?

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Cisco Switching/Routing :: Stack Port Down On 3750

Mar 11, 2013

have a cable i think is bad, is it possiable to switch the cable out without causing any downtime to the switch or connected devices?
 
HQ-1st-Flr-Stack#show switch stack-ports summary
Switch#/  Stack   Neighbor   Cable    Link   Link   Sync      #         In 
Port#     Port              Length    OK   Active   OK    Changes   Loopback
Status                                          To LinkOK   

[Code].....

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Cisco Switching/Routing :: Upgrading A Stack Of 3750

Apr 29, 2012

I just need a little refreshing on upgrading a stack of 3750's.  This stack only has 2 switches: [code]

1.) If I remember correctly I simply tftp the IOS to the flash of each switch and then reload the master only?
2.) Can I safely assume these are the 2 flash locations:

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Cisco Switching/Routing :: 3750 / Add A New Switch In Stack?

Jun 21, 2012

i want to remove an access layer 3750 48 POE master switch and replace with a  new 3750 switch in the stack. i want to copy the same configuration to new switch since the old switch is having POE issue and I got replacement of the malfunctioned switch. we have VTP domain is configured in the network...

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Cisco Switching/Routing :: 3750 Add A Config To Stack?

Mar 15, 2012

I have been given 2 3750 switches and need to put a config onto it wuld is for 2 3750's in a stack, how should I put this on the 2 switches?  Is it bested to install it onto 1 switch first then physically attach the 2nd after?

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Cisco Switching/Routing :: Add Stack Member 3750?

Jul 10, 2012

One of the stack member has failed and we need to replace the same with the new one.
 
[code],....

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