Uplinks between 3500 switches

Unanswered Question
Apr 12th, 2008
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Hi all,


Its a quite simple question i guess. We are doing some changes in the Network topology. There is a single 3548 switch which have uplinks to 7 other swichtes. There is an 3524 switch which is connected to an old 2924 switch and 2924 is connected to 3548. All switch ports are on default vlan. Now when i remove the 3524-2924 uplink and connect the 3524-3548, the link does not come up !!! 3524 is an external switch and has 3 vlans to seperate the traffic and all ports have portfast enabled only on this switch.


I am out of clue what could be the problem. Please guide.


Thanks in advance.


abc

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mahmoodmkl Sat, 04/12/2008 - 00:41
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Hi,


I think u should look into STP issues.


Thanks

Mahmood

ciscokalpesh Sat, 04/12/2008 - 01:02
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Hi,


Thanks for reply.


I disabled the portfast on the port connecting as uplink on 3524. So STP should work then.


What if if enable portfast on the 3548 port and connect 3524-3548 ?


Thanks again.


abc.

mahmoodmkl Sat, 04/12/2008 - 02:52
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Hi


If u dnot want redundant connections between u r switches then u can enable portfast.



Thanks

Mahmood

ciscokalpesh Sat, 04/12/2008 - 03:08
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Hi,


Thanks for reply.


Well in that case, if i disable portfast on two uplinks on 3524 and connect one to 3548 and second to 2924 switch. After i remove 3524-2924 uplink, the 3524-3548 should be active. But this is what is not happening. The link between 3524-3548 is not coming up.


Thanks again


abc

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