How to Creat a an ACL on a VLAN that isolates iton a 6500 Cisco Chassis

I have a VLAN that I want to completely isolate. How do I make an ACL to do that?
JesusFreak42Asked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Don JohnstonInstructorCommented:
Don't assign an IP address to the SVI (VLAN interface).

Or do you want some connectivity?
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Oliver KaiserSystems EngineerCommented:
If you want to completely isolate a VLAN do not create an SVI. If there is no router within the VLAN traffic cannot end up in another network segment.

If you just need to deny access to certain network ranges use ACLs

//Define an extended access-list with name ACL_VLAN100
Router(config)#ip access-list extended ACL_VLAN100
//Permit Traffic from 192.168.1.0/24 to 192.168.2.0/24
Router(config-ext-nacl)#permit ip 192.168.1.0 0.0.0.255 192.168.2.0 0.0.0.255

Router(config)#interface vlan100
//Apply ACL_VLAN100 to SVI inbound. Traffic coming from VLAN100 is being inspected
Router(config-if)#ip access-group ACL_VLAN100 in

Open in new window


Keep in mind that there is an implicit deny any any hidden at the end of the ACL which means you have to explicitly allow traffic to pass.
0
JesusFreak42Author Commented:
Simplest solution and works.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Switches / Hubs

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.