02-01-2008 08:45 AM - edited 03-03-2019 08:32 PM
Can the VLAN information be suppressed on a trunk port on a Catalyst 6513?
02-01-2008 08:51 AM
Hi
What exactly do you mean by suppressed. You can
1) clear a vlan off a trunk link in which case no traffic for that vlan will traverse the trunk
2) Use VTP pruning which stops most traffic for a vlan going across the trunk if there are no ports in that vlan at the other end but STP will still run across the trunk for that vlan.
HTH
Jon
02-01-2008 09:00 AM
Or you can do manual suppression of vlans on the interface with the command below.
switchport trunk allowed vlan
Regards
02-01-2008 09:03 AM
Hi Jon,
Thanks for the promp response.
Here is what I mean:
I have to connect my customer's 3750 switch, over a trunk port, to my 6513 switch, on which I have othe VLANs, I don't want the customer to see my other VLANs on his swich, only the one that he will be using.
He is running his traffic on VLAN xx and I will create the same VLAN on my switch and allow only that VLAN on the trunk. However, this doesn't prevent the VLAN information from getting across the trunk?
02-01-2008 09:37 AM
Hi
Yes you are correct, unless your switch is set to be VTP transparent it will propogate the vlan information to the customer. You could ask them to use VTP transparent on their switch but you may or may not trust them.
As far as i know there is no way to use VTP transparent on some trunk links and VTP server on others so unless you can set your switch to VTP transparent then you will have to rely on manually only allowing the customer vlan traffic on the trunk.
Jon
02-01-2008 10:35 AM
Thanks Jon
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide