Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

1800 router vlan configuration

we have 3 vlans 1.1,1.2 and 1.6 we need a solution like vlan 6(1.6) has to access all the users who are in vlan 1(1.1) and vlan2(1.2) and have to block vlan 1 and 2 to access vlan6 we already applied the access list and this is not working i also attached the configuration file help me to solve this issue

thanks in advance

New Member

Re: 1800 router vlan configuration

If I understand correctly, you want:

o vlan 6 users to be able to access vlan 1 and vlan 2 users

o but vlan 1 and vlan 2 users can not access vlan 6 users

If the above is correct, you're not going to be able to achieve this with access lists. Think about the traffic path. It's a two-way street. For vlan 6 users to access vlan 1 and 2 users that implies that return traffic from vlan 1 and 2 users must be allowed to vlan 6.

Please let me know if I misunderstood your request!

Thanks, Robin.


Re: 1800 router vlan configuration

Correct me if I'm wrong, but couldn't you control this with a reflexive list from VLAN 6 to VLAN 1 & 2? Something like, slap all traffic from VLAN 6 incoming into a list, then evaluate the reflexive list outgoing, deny everything else?

I have this setup for my 871 at home, works just fine to block traffic.