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New Member

ACCESS LIST

Hi Friends,

I have query regarding implementation of access list on a physical interface or on a vlan interface. Mean to say what is the difference in applying acl on (in).

Thanks,

6 REPLIES
Blue

Re: ACCESS LIST

An access-list applied outbound to a vlan interface is traffic going TO machines on that vlan.

An access-list applied inbound to a vlan is traffic coming FROM machines on that vlan.

New Member

Re: ACCESS LIST

Are these directions same with physical interface also.

Thanks,

New Member

Re: ACCESS LIST

Yes they are the same.

New Member

Re: ACCESS LIST

could you please tell me where will be the source and destination in both cases.

New Member

Re: ACCESS LIST

Take this for example.

You have a interface VLAN 10 and hosts in this VLAN

When you use this host to access other network, it will be the IN direction at interface VLAN 10

When host from other network access to this host , it will be the OUT direction at interface VLAN 10

Try to think of the direction of traffic with respect to the Interface itself.

IN Direction (IN to the interface)

Host --> Interface VLAN 10

OUT Direction (OUT from the interface)

Host <-- Interface VLAN 10

New Member

Re: ACCESS LIST

If you are querying about direction-wise,

IN = Traffic from the VLAN going out

OUT = Traffic going towards the VLAN

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