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Cisco ACI Cookbook by Stuart Fordham

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We have created a very basic regular contract to provide to another tenant. There are other types of contracts we can create. Taboo contracts are used to deny and log traffic. Like conventional access control lists to deny traffic, these need to come first. An example would be where we are permitting a large number of ports and want to deny one or two particular ports; we would do this with a taboo contract to deny the traffic, created before the regular contract permitting the entire range.

In this recipe, we added a couple of labels. Labels allow us to classify what objects can talk to each other. Label matching is performed first, and if no label matches, then no other contract or filter information is processed. The label-matching ...

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