10-07-2006 12:18 AM - edited 03-05-2019 12:07 PM
HI,
I am using a 3500 switch which is connected to my Core (L3 Switch). i have made the fast Ethernet port 15 as a trunk port and have created a vlan interface.
my problem is that my trunk port and interface valn both are showing up but i am neighther able to ping the core switch nor the vlan information on the core is populating on the access switch.find below the config and please help me getting this up.
Interface FastEthernet0/15
duplex full
speed 100
switchport trunk encapsulation dot1q
switchport trunk native vlan 200
switchport mode trunk
Int Vlan 200
interface VLAN200
ip address 172.26.11.250 255.255.252.0
no ip directed-broadcast
no ip route-cache
10-07-2006 01:26 AM
Hi Sami,
The reason your trunk port not carrying vlan information of vlan 200 is because native vlans send their frames untagged on trunk links so identification and classification is lost.
Its always good praticse to keep the native vlan the default vlan1.
To allow dot1q to tag native vlans use this command to enable it.
Switch (config)# vlan dot1q tag native
Hope this helps
Thanks,
Raj
10-07-2006 03:05 AM
Can you post the output of sh VTP status form both switches & output of sh int fa 0/15 switchport
Narayan
10-08-2006 06:27 PM
Hi Rajnikant,
Thanks a lot for the information it's really very helpfull.
but would alos like to tell you that the same thnk started working later when i created a vlan 200 in the vlan database any clue how this worked?
10-09-2006 07:45 PM
I think, you are running VTP transparent mode on your core switch. For vtp transparent mode, you need to create required vlan in access switch first in order to connect to core switch.
10-07-2006 08:05 AM
Could you also show the configuration of the core swith trunk port.
Outputs from both the core switch and local switch would also be useful.
e.g. show interfaces fastethernet 0/15 trunk
SD
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