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02.08.2008 at 02:43AM PST, ID: 23147339
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How am I to troubleshoot this. This message is from a 3500XL Switch ( one among the cascade configuration)

Asked by jkdas in Network Switches & Hubs, Network Operations

Tags: 2d09h: %SW_MATM-4-MACFLAP_NOTIF: Host 0201.0000.0000 in vlan 2 is flapping between port Gi0/1 and port Gi0/2

We have 8 switches in cascade (Half Duplex Gigastack) . Lets say Switches 1-8. A fibre from our main building land at Switch 1. There is an uplink to another building from Switch 3.  

[3500XL    ]
[3500XL    ]
[3550PWR]
[3500XL    ]
[3500XL    ]
[3500XL    ] gig to another building
[3500XL    ]
[3500XL    ] <- fibre from manin building

1)We have couple of hubs connect to various ports on these switches
2)I get this error message  %SW_MATM-4-MACFLAP_NOTIF: Host 0201.0000.0000 in vlan 2 is flapping between port Gi0/1 and port Gi0/2
3) I also have lots of collision on Switch 1's exit port to Switch 2 ( Do I need to post sh in gig 0/1 ?)
4) What will be causing these collisions? How can I find the culprit(s)?
5)We will be replacing the hub with 8 port switches soon
6)We have vlans running for data/voice/management
7)Yes, its trunked and sort.

Is there a better way to reconfigure this design....like Star ? But then there will have to be a purchase.

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[+][-]02.08.2008 at 04:50AM PST, ID: 20849627

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[+][-]02.13.2008 at 12:58AM PST, ID: 20882676

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[+][-]02.13.2008 at 01:10AM PST, ID: 20882728

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[+][-]02.13.2008 at 01:21AM PST, ID: 20882765

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[+][-]02.13.2008 at 07:53PM PST, ID: 20890784

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[+][-]02.13.2008 at 11:28PM PST, ID: 20891584

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About this solution

Zones: Network Switches & Hubs, Network Operations
Tags: 2d09h: %SW_MATM-4-MACFLAP_NOTIF: Host 0201.0000.0000 in vlan 2 is flapping between port Gi0/1 and port Gi0/2
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Solution Provided By: from_exp
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Solution Grade: B
 
 
 
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