Cisco 4006 problem

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Oct 4th, 2009
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I am having Cisco 4006 switch and I have connected three cisco 2950 switch through fiber connecter. All the three switchs are showing in CDP neighbor but un able to ping one switch. I have cleard the mac table , cleared the trunk but one switch is showing cdp unable to ping .

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Giuseppe Larosa Sun, 10/04/2009 - 07:24
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Hello Thiru,

if the link is an 802.1Q L2 trunk check if there is a native vlan mismatch on the two sides


sh int typex/y switchport

check also the list of vlans allowed on both sides.

Hope to help


thiru.vel10 Mon, 10/05/2009 - 02:08
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HI Giuseppe,

Thanks for this Destils.

There was problem in Module , the Service Engineer is faulty. Hence i have removed the switch which is connected from that faulty module and connected to another working switch. Now everything seems normal . let you know if am getting anythings. :)


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