Overview:

Two pod VVD design with an underlay built on Cisco ACI and using OSPF adjacencies with a single area with BGP providing adjacencies for the overlay provided by NSX.

Problem description: Inconsistent routing of traffic on the overlay.

The root of the Problem:

Edge-1 was publishing routes to ACI fabric to allowing underlay to route traffic to overlay networks. ACI was then publishing those routes to Edge-2 with higher priority than what the DLR was publishing the routes to Edge-2 as this causing traffic on Edge-2 could not forward to the DLR connected to Edge-2.

Resolution: Was to change the design from uplinks on multiple edges to uplink on single EDGE with HA enabled.

ProblemStatement

Reconfiguration:

Edge Configuration: Uplink to vDS and Internal connection to Global Transport Network

ChangeConfig-1

OSPF routing on EDGE: Uplink1 will connect to ToR for OSPF traffic.

ChangeConfig-2

BGP routing on EDGE: Configure Neighbors.

ChangeConfig-3

Route Distribution on EDGE: Needs two distributions from BGP to OSPF and accept all BGP.

ChangeConfig-4

DLR configuration: Uplink to EDGE-01 with three local virtual switches.

ChangeConfig-5

OSPF Configuration on DLR:  Disable

ChangeConfig-6

BGP Configuration on the DLR: BGP connection to the Edge.

ChangeConfig-7

Route redistribution: Only BGP connected needed.

ChangeConfig-8

Final configuration architecture:

Finalconfig

 

VCP-DV, VCP-NV, VCAP-DCD currently working at VMware in the PSO organization​.

2 Comment on “NSX, ACI, OSPF, BGP single network easy, right?

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