Question

Connected Transit

  • 22 November 2020
  • 9 replies
  • 4 views
E

Hello All,


 


I have question about Connected Transit with this topology.


Is it possible for VPC B & C to communicate with each other ?


I follow https://docs.aviatrix.com/HowTos/transitvpc_workflow.html


https://docs.aviatrix.com/HowTos/transit_advanced.html#connected-transit


not successful yet, appreciate your help.


 


Thank you.

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9 replies

D

Hi Estint, from first glance I would say this should work. How are you testing this and what troubleshooting steps did you take?

E

Hi Dennis,


Thanks for your help.


I'm not yet testing the connection, because i'm not see prefix 10.21.0.0/16 on VPC B route tables


and prefix 10.24.0.0/16 on VPC C route tables.


Thank you.

S
Badge

Hello!  Yes, enabling connected transit is a requirement for spoke gateways to talk to each other.  You will see the route tables populate after enabling that feature.  

E

Hi Spence,


Thanks for your reply.


I already enabled it before and the route tables not populate.

S
Badge

Estint The routes won’t show up in the VPC route tables.  They will be in the Spoke Gateway route table.  

E

Hi Spence,


How they can reach each other if no route in there ?


I already try put static route on both side and still can't too.


And I already open security group on both side too.

S
Badge

Estint Each VPC Route table will have a 10.0.0.0/8 inserted by the AVX Controller pointing at the Spoke Gateway of the VPC.  The spoke gateways have a route to each local subnet VPC with a destination of the VPC default gateway.  

So traffic from VPC B headed for VPC C will start by using the 10.0.0.0/8 route in the vpc route table with a destination of the Spoke B Gateway.  The Spoke B Gateway then has a route for VPC C, with a destination of the vpn tunnel interface of the transit gateway.  The transit gateway has a route to VPC C with a destination of the spoke C vpn tunnel.  The Spoke Gateway in VPC C, receives the traffic and has a local gateway route to the VPC and drops the traffic off at the VPC C default gateway.  Which is then locally routed by the default gateway.  
 


Make sense?  If not I could do a zoom session or something and walk through it with you next week.

Mark_Noorman
Badge +1

Hi Estint,


I would recommend using Flightpath on the Controller to troubleshoot connectivity between endpoints in both VPC's. This will quickly indicate which point(s) are preventing end-to-end communication.


Best regards,


Mark

E

Hi All,


Sorry just back from on leave.


Problem solved.


Thanks all for your help.


Appreciate all your help.


Thank you.

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