Adding a C2950 to a C3550

[londint]

I have a C3550 EMI and C6509. The C6509 is the vtp server and the C3550 is connected up to it and this works fine.

I have connected up a C2950 to the C3550 and change the vtp on the C2950 accordingly.

The following happened:

On the C2950, the vtp mode changed from client to transparent.

No update coming from the C6509.

Pls what am I doing wrong.?

I need the following to happen.

1. On the C2950, I want to see all the vlans from the C6509.

2. On the C2950 previously, there has been some vlans configured. These are still there but i want them picked up by the C6509

3. On the C2950, I want to configure an existing vlan on the C6509 e.g vlan 700 on it with an ip address. How do I go about doing this as It will only allow me one vlan which has already been taken up for management purpose.

4. I need to be able to ping devices i have configurdd on the C2950.

Thanks for your help

[paddyxdoyle]

Hi,

1. Is the link between the c2950 set to trunk, are both ports in the link in the same native VLAN with the same duplex/speed settings, have you added the correct VTP domain name to your 2950 switch? - not sure why it turned to transparent!

2. These VLANs will have to be added to the VTP server (6509)

3. The 2950 is not a layer three switch, you can only create a VLAN for management purposes. This VLAN interface (700) should ideally go on your 6509 if you have layer 3 capabilities, and a layer two VLAN (700) will need be created on your VTP server (6509) and trunked between your switches. You can then add whichever necessary ports on your 2950 switch into VLAN 700 (learnt by VTP) and they will be able to see the default gateway on your layer 3 device.

4. Make sure all your VLANs are trunked between all switches and your edge devices have been statically assigned to the correct VLANs

Hope this helps

Paddy

[londint]

Thank you very much.

I have completely forgotten about the trunking. I will do just that.

Question, as I have already configured the vlans on the 2950, if after doing the trunking, do I configure the vlan on the 6509 before i enable the trunking. I have made sure that the numbers do not clash.?

Thanks

[londint]

Thank you very much.

I have completely forgotten about the trunking. I will do just that.

Question, as I have already configured the vlans on the 2950, if after doing the trunking, do I configure the vlan on the 6509 before i enable the trunking. I have made sure that the numbers do not clash.?

Thanks

[londint]

Thank you very much.

I have completely forgotten about the trunking. I will do just that.

Question, as I have already configured the vlans on the 2950, if after doing the trunking, do I configure the vlan on the 6509 before i enable the trunking. I have made sure that the numbers do not clash.?

Thanks

[glen.grant]

You probably have more vlans going across the trunk than the 2950 can handle . It will then put itself into transparent mode . You need to manually prune off anything that you don't need going across . I know there used to be a limitation of 64 on the old 2924's .The 2950's have 250 vlan limit. The address on the 2950 is for manageing the 2950 only . Are you saying that the new devices are in vlan 700 ?If you are using 700 as the management vlan just do a conf t, interface vlan 700 then put the ip address in and no shut it . Also create the vlan at layer 2. Sounds like you are allowing all vlans across the trunk which means a spanningtree instance for each vlan , the 2950 can only handle 250 instances . If this is the case then manually prune any vlan you do not need traveling across the trunk . On the 6509 manually prune any vlan you do not need on the 3550 or the 2950 . Do not allow all vlans across the trunk .