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Beginner

Trunking btw 2950 and 2960

Hi,

       i am trying to connect 2950 and 2960

1) Trunk port is up on both the switch

2) i can see other switch when i do sh cdp neigh

3) VTP domain name is blank for both the switch

4) There is no VTP password

but still VLANs are not getting transffered from 2950 to 2960. Any idea .....

regards

Neo

10 REPLIES 10
Enthusiast

Re: Trunking btw 2950 and 2960

Hi,

Are the needed VLANs configured on both switches?


Can you post your configs?

Can you post the output of "show interface interface-name (fe.Gi0/1) trunk" of both switches?

Can you post "show spanning-tree"?

HTH,

Dario

Beginner

Re: Trunking btw 2950 and 2960

Are the needed VLANs configured on both switches?

On server switch VLANS are configured


Can you post your configs?

not possible

Can you post the output of "show interface interface-name (fe.Gi0/1) trunk" of both switches?

output is same.Trunking=On , Default Encapsulation DoT1q

Can you post "show spanning-tree"?

Port is fwding mode

regards

Neo

Enthusiast

Re: Trunking btw 2950 and 2960

What about the output of "show vlan" on both switches?

Beginner

Re: Trunking btw 2950 and 2960

On Old switch its showing 8 VLANs but in new switch only default VLANs are showing.

regards

Neo

Enthusiast

Re: Trunking btw 2950 and 2960

What is your problem actually?

You have configured VLANs on a switch, now you want another switch to learn these VLANs and allow these VLANs between these 2 switches?

Please describe your problem clearly.

Beginner

Re: Trunking btw 2950 and 2960

Hi,

Have you tried specifying a VTP domain, you may well need this for VTP to work I have never tested.

Thanks

Chris

Beginner

Re: Trunking btw 2950 and 2960

I cant specify as client is not permitting .

regards

Neo

Beginner

Re: Trunking btw 2950 and 2960

Specify the VTP domain on the VTP server and as long as no VTP password is set the clients should change automatically.

Enthusiast

Re: Trunking btw 2950 and 2960

let's suppose swA the old switch and swB the new one

first, make sure swB's VTP configuration does not overwrite swA's config. You can, e.g., put swB in Transparent mode (configuration register is reset to 0), delete vlan.dat, set vtp mode to Client, connect it to swA, configure correct vtp domain name (and password if any).

If you connect swB to swA without these measures, you may end up with VLANs configuration on swA being overwritten by the VLAN configuration on swB.

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Hall of Fame Community Legend

Re: Trunking btw 2950 and 2960

How do you expect the VLANs to propagate from the VTP Server to the VTP client if the following are missing:

1.  VTP Domain name; and
2.  VTP password.

If you don't have any values in any of them, VTP propagation won't work.

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