there's a problem that's keeping your vPC from coming up. The global version will show you system settings that need to match: NX-5K-1# sho vpc consistency-parameters global Legend: Type 1 : vPC will be suspended in case of mismatch Local Value Peer Value ([], [3], [], [], [], Network QoS (MTU) (1538, 2240, 0, 0, 0, (1538, 2240, Network Qos (Pause) (F, T, F, F, F, F) (F, T, F, F, F, F) Input Queuing (Bandwidth) (50, 50, 0, 0, 0, 0) (50, 50, 0, 0, 0, 0) Input Queuing (Absolute (F, F, F, F, F, F) (F, F, F, F, F, F) Priority) Output Queuing (Bandwidth) (50, 50, 0, 0, 0, 0) (50, 50, 0, 0, 0, 0) Output Queuing (Absolute (F, F, F, F, F, F) (F, F, F, F, F, F) Priority) STP Mode Rapid-PVST Rapid-PVST STP Disabled STP MST Region Name STP MST Region Revision STP MST Region Instance to VLAN Mapping STP Loopguard Disabled Disabled STP Bridge Assurance Enabled Enabled STP Port Type, Edge Normal, Disabled, Normal, Disabled, Chapter 7: Link Aggregation BPDUFilter, Edge BPDUGuard Disabled Disabled STP MST Simulate PVST Enabled Enabled Allowed VLANs 1-10,50-90,94-97 1-10,50-90,94-97 You can also use the interface interface-name - keywords to get interface-specific data regarding vPC consistency: NX-5K-1# sho vpc consistency-parameters interface po4 Legend: Type 1 : vPC will be suspended in case of mismatch Local Value Peer Value STP Port Type Edge Trunk Port Edge Trunk Port STP Port Guard STP MST Simulate PVST Default Default lag-id [(1, 2-a0-98-13-6-10, [ (1, 2-a0-98-13-6-10, 1, 0, 0), (7f9b, 1, 0, 0), (7f9b, 0-23-4-ee-be-1, 8005, 0-23-4-ee-be-1, 8005, 0, 0)] 0, 0)] active active Speed 10 Gb/s 10 Gb/s Duplex Port Mode trunk trunk Native Vlan Shut Lan Allowed VLANs 3-7,9 3-7,9 You can get a status for all your vPCs with the show vpc command: NX-5K-1# sho vpc Legend: (*) - local vPC is down, forwarding via vPC peer-link vPC domain id Peer status : peer adjacency formed ok vPC keep-alive status peer is alive Configuration consistency status: success vPC role : secondary vPC Peer-link status Status Active vlans 1-100,300-400 vPC sta