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

Or do you want some connectivity?

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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 to
Router(config-ext-nacl)#permit ip

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

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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.
JesusFreak42Author Commented:
Simplest solution and works.
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