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VTP VLAN Flow

Hi,

I have a new 4510 SUPV switch installed in the existing network.

When connected to the Core with proper configuration of VTP i am unable to see all the VLAN's in the new 4510 switch.

Further if one static VLAN is configured in the 4510 switch with transparent mode the same is accessible from network.

Its just something with the VLAN flow in the new switch.

Following is the configuration of the switches.

Core#sh vtp status

VTP Version : 2

Configuration Revision : 0

Maximum VLANs supported locally : 1005

Number of existing VLANs : 10

VTP Operating Mode : Client

VTP Domain Name : ABC

VTP Pruning Mode : Disabled

VTP V2 Mode : Disabled

VTP Traps Generation : Disabled

MD5 digest : 0x02 0x4B 0x3B 0x84 0x01 0x20 0xB8 0xD1

Configuration last modified by 0.0.0.0 at 5-16-07 11:24:24

Core#sh run int fa 3/48

Building configuration...

Current configuration : 95 bytes

!

interface FastEthernet3/48

switchport trunk encapsulation dot1q

switchport mode trunk

end

Distribution#sh vtp status

VTP Version : 2

Configuration Revision : 8

Maximum VLANs supported locally : 1005

Number of existing VLANs : 13

VTP Operating Mode : Server

VTP Domain Name : ABC

VTP Pruning Mode : Disabled

VTP V2 Mode : Disabled

VTP Traps Generation : Disabled

MD5 digest : 0x86 0xF1 0x9B 0xAD 0xAA 0x5C 0xFF 0xCA

Configuration last modified by 172.16.10.1 at 3-1-93 00:25:16

Local updater ID is 172.16.10.1 on interface Vl200 (lowest numbered VLAN interfa

ce found)

Distribution#sh run int fa 1/0/48

Building configuration...

Current configuration : 97 bytes

!

interface FastEthernet1/0/48

switchport trunk encapsulation dot1q

switchport mode trunk

end

IOS -

Version 12.2(25)SG1, cat4500-entservicesk9-mz.122-25.SG1.bin

Please let me know if you have come accross similar issue and its resolution.

Appreciate your valuable contribution.

Regards,

Amol.

1 REPLY
Purple

Re: VTP VLAN Flow

The vlans are not being propagated across the trunk . If you look at the config revision numbers the server is 8 and the client is 0 so the client is not recieiving the updates and why they are not showing up.The revision numbers would be the same if it is working correctly. I have never been a big fan of forcing the trunks up , on the interfaces instead of switchport mode trunk use "switchport mode dynamic desirable" on both sides of the link . Also make sure your native vlans match on each side of the link. "switchport trunk native vlan X"

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