09-07-2010 12:48 AM - edited 03-06-2019 12:51 PM
Hi ,
I have two 3750 switch and one of them is core switch.The core switch is configured 14 VLAN.the 2nd l3 switch is connected with core switch by trunk mode.My all VLAN is working properly except VLAN 4.The problem is VLAN 4 it goes down and after 30/40 second it goes up.I tried but can't find out the problem so please help me out of this problem.
PPCL IS MY CORE SWITCH
i have attached my current config.
09-07-2010 04:58 AM
Hi,
Can u please clarify about the qurey. ie what's happening with you network.
Is that int vlan 4 is going down or VLAN 4 itself disappering?
What are the nodes connected with VLAN 4?
Regards,
Sivaprakash
Bangalore
09-07-2010 05:01 AM
Hello,
When you say that the VLAN goes down, are you referring to Layer 3 interface
(interface vlan 4)? Can you please post the output of "show spanning-tree
vlan 4" command when the interface goes down? Most likely the interface goes
down when the trunks participate in spanning-tree recalculations.
Regards,
NT
09-07-2010 05:25 AM
arup,
send us a # sh vlan id 4
from both switches
many thanks
09-07-2010 11:04 PM
09-08-2010 05:55 AM
Hello,
Can you please post the output of "show interface gi 1/0/9 from L3SWPPCL
switch?
Regards,
NT
09-08-2010 06:29 AM
Hi,
on the second switch, you have several SVI for several vlans without IP configured.
So IP-Processing is OFF.
I would reommende to either give thos vlans ip-adresses (and problably configure also hot standby)
or delete the svi interfaces
"int vlan 4; shut; exit; no int vlan 4"
This will not delete the Layer-2 vlan 4 , just the routed but not configured interface.
Hope this help's,
Juergen.
09-08-2010 09:45 PM
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