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fly Beginner
Beginner

Vxlan underlay backup routing SVI VLAN cross VPC Peer link interface!

 becase we config peer-gateway and peer-switch feature under vpc .

I config vxlan underlay backup routing between two VPC leafs across peer-link

config like below url said at bottom

 

one question:

backup routing interface vlan just exist on peer-link , but when we config peer-switch on both leafs.

we found this vlan is putted into spanning tree backup state, and interfave vlan can't get up

 and ospf can't established,

so i change this vlan spanning tree priority on one leaf switch , and spanning tree state on this vlan ( peer-link interface) change to forwarding。 

 

is there other solution to resolve this problem?

 thank you!

Jere

 

 

 

 

 

 

 

 

 

 

 

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/7-x/vxlan/configuration/guide/b_Cisco_Nexus_9000_Series_NX-OS_VXLAN_Configuration_Guide_7x/b_Cisco_Nexus_9000_Series_NX-OS_VXLAN_Configuration_Guide_7x_chapter_011.html

 

 

Enabling vpc peer-gateway configuration is mandatory. For peer-gateway functionality, at least one backup routing SVI is required to be enabled across peer-link and also configured with PIM. This provides a backup routing path in the case when VTEP loses complete connectivity to the spine. Remote peer reachability is re-routed over peer-link in his case. In BUD node topologies, the backup SVI needs to be added as a static OIF for each underlay multicast group.

 

 

 

 

 

 

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2 REPLIES 2
Cisco Employee

Re: Vxlan underlay backup routing SVI VLAN cross VPC Peer link interface!

Hi,

 

Did you configure the Vlan on both VPC Peers? 

 

May I ask, what is the version of NxOS running when you attempted to implement it?

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Beginner

Re: Vxlan underlay backup routing SVI VLAN cross VPC Peer link interface!

Did you also remember to configure system nve infra-vlans <vlan-id> force for the vlan you are using for the backup routing SVI?

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