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There is a specific design issue on the ASIC used on the F2 module that prevents it from working with F1, M1 and M2.Sent from Cisco Technical Support iPhone App
N7k does not support keepsalives on gre tunnels disable them on the other equipment to get the tunnel to function Sent from Cisco Technical Support iPhone App
The majority of the deployments for Nexus 7000 have been in the Aggregation and Core layers of the network. There are a number of case studies at the link below you may want to review.http://www.cisco.com/en/US/products/ps9402/prod_case_studies_list....