VLAN help

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say i have four switches

and 5 vlans on one switch, these vlans being

Vlan1
Sales
Admin
Production
Engineering

o say i have a trunk in vlan1 going to another switch, can i have this
switch only having three of the vlans?

for example

could i have this switch only having

Vlan1
Sales
Admin

would this still work in conjunction with the vlans on the other switch
which had 5 vlans? I would repeat this step again only having a switch with
vlans

Vlan1
Production
Engineering

do you understand what I am attempting to do and if so would it work,
providing all the vlans have the same names and same vlan numbers etc.

Thanks in advance

Christo




Re: VLAN help

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here is an example drawing i did quickly in paint, would this work
correctly? providing all of the vlans are configured correctly, I am using
catalysy 2950 switches, would the commands just be the regular commands for
setting up vlans on 2950?

http://www.juststuff.co.uk/vlan.JPG

Thanks again



Re: VLAN help
If I understand your question, no you couldn't do it that way.  I would use
VTP, one switch as a server, the others as clients, and then implement a
switch port security policy.



(I am studding for the CCNA, and have booked to take the exam in 3 weeks, so
I don't claim to be an expert, this is just my opinion. If I am wrong etc or
if there is a better way let me know comments would be appreciated.)



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Re: VLAN help
Any other questions you may want to ask here:

comp.dcom.sys.cisco

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Re: VLAN help

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Yeah.

You can do it with VTP, and prune unused VLANs, but it looks like you want
to implement some security.

Well, the simple thing is just not assign any access ports to the undesired
VLANs.

However, it would be even easier to just specify which VLANs are allowed
across the trunk.



Jonathan



Re: VLAN help
you can do this with or without VTP. if you are not using VTP you have to
manually add each VLAN to each switch (but you knew that..right?). If you
use VTP just prune the unwanted VLANs from the respective switch. but the
idea using VTP and then not adding switchports to the unwanted VLANs would
work too.

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Re: VLAN help


I just learned VTP i think i will probably be using VTP on the main central
switch and then just not adding any switchports on the VLANS not in use on
other switches

Thanks

Christo


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