VPC FAQs

1. Can VPC port-channel number different on peer switch?

Answer: - yes, it can be different

2. Is a single VPC domain between two VDCs on the same physical Cisco Nexus 7000 device supported?

Answer: - No, It is not supported.

3. What are the default parameters of VPC?

Answer:- Below are paramaters.

Parameters	Default
vPC system priority	32667
vPC peer-keepalive interval	1 second
vPC peer-keepalive timeout	5 seconds
vPC peer-keepalive UDP port	3200

4. Are Jumbo frames enabled by default on the vPC peer link.

Answer: Yes, jumbo frame are by default enable.

5. What license is required for VPC?

Answer:- No license is required for VPC

6. Can we create both layer2/3 Only Layer 2 port channels can be in vPCs.

 Answer:- No, we can only configure Layer port-channel in VPC.

7. In VPC peer-link, is F1 on one side and M1 on the peer switch supported?

Answer:- No, Module type of both end should be identical. Please refer to the below table.

vPC Primary	vPC Secondary	Supported/Not supported
F1 I/O module	F1 I/O module	Supported
F1 I/O module	M1 I/O module	Not supported
M1 I/O module	M1 I/O module	Supported
M1 I/O module	F1 I/O module	Not supported

8. Can we use physical interface as VPC peer-link?

Answer: No, VPC peer-link can only be configured on port-channel containing 10 gig interfaces. 1 Gig interfaces  cannot be configured as VPC peer-link

9. Can we configure system-mac for VPC?

Answer: Yes, we can configure the system ID for VPC with below command

Nexus(config)# vpc domain 5

Nexus(config-if)# system-mac 0000.0000.000a

  

10. What is the default role-priority?

Answer: It can be from 1 to 65535 and default value is 32667.

Note: - Lower is better.

11. What is the default VPC domain ID?

Answer: - There is no default domain-id and can be configured from 1 to 1000.