Cisco 4006 problem

[thiru.vel10]

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 .

[Giuseppe Larosa]

Hello Thiru,

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

use

sh int typex/y switchport

check also the list of vlans allowed on both sides.

Hope to help

Giuseppe

[thiru.vel10]

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. :)