Impact of Config Interface Profile on ACI

[am.]

Hello, i am beginer network engineer and this is my first experience with Cisco ACI. 

I just create a new interface profile and then associated it into existing switch profile on Cisco ACI for future needs.

I have not even binding this interface to any epg or use it for any L3out.

My question is, when i do this, is there any impact on traffic in ACI? or maybe drop packet or something?

[RedNectar · Accepted solution]

Hi am.,

Welcome to the wonderful world of software defined networking and dynamic configuration.

One of the great beauties of ACI is that policies are not pushed to a switch until they are needed.  So even if you have built a complete Access Policy Chain, none of the embedded configuration of that chain gets applied to a ports that is contained in the chain until a particular port/VLAN combination is applied to an EPG or L3Out/Interface Profile/Port Profile.

So to answer your question:

is there any impact on traffic in ACI?

The answer is "No, building Access Policies (Leaf Profiles/Interface Profiles/Interface Policy Groups/Attachable Access Entity Profiles/Domians and VLAN/VXLAN Pools) has no affect on traffic in ACI."

Note: I will add one small exception: When you configure associate an Interface Selector to an Interface Policy Group, the Interface Policies in that Interface Policy Group are applied - such as enabling LLDP, LACP etc. So a Port Channel or VPC interface will come up before it is used.  Note however, that any VLANs defined in the Access Polciy Chain will not be enabled on that Port/PC/VPC until appropriate configuration is applied.

I hope this helps

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[am.]

Hi Chris,

Thanks for the Answer.