Does Bank need to procure different switch keys for Acquirer and Issuer setup?

Does Bank need to procure different switch keys for Acquirer and Issuer setup?

The Switch Keys depend on the ASPs. In case you have the same ASP for both Acquirer and Issuer, then the same set of keys can be used.
In case the ASP is different for the Acquirer and the Issuer, then each ASP will have a different set of keys.