er global reach between dedicated edge routers

Question

Hi all i have to connect my onprem to 2 different azure vmware private cloud, each one has a dedicated edge router can i do global reach between them and also to onprem? let's calrify 1st Express Route Circuit onprem to hub vnet with er gateway 2nd Express Route Circuit from hub vnet to avs1 3d Express Route Circuit from hub vnet to avs2 can i do global reach between 1-2 and 1-3 and 2-3? are there any limits on how many global reach I can do? thanks

Answer 1

@ares ,

Welcome to the Microsoft Q&A Platform. Thank you for reaching out & I hope you are doing well.

I understand that you would like to use Azure ExpressRoute Global Reach.

• Please note that the intent and use case of Azure ExpressRoute Global Reach is to provide connectivity across OnPrems connected to ExpressRoute Circuits.
• This means, it is not intended to provided Transit connectivity across Azure Virtual Networks.
• To have transit connectivity between VNETs, make sure you link the VNETs to all ExpressRoute Circuits.
• This is explained in About ExpressRoute Global Reach

With that said,

• Your requirement is documented here : On-premises interconnectivity with AVS.
• It appears it is possible to connect OnPrem
• You must enable Global reach between
  • HubCircuit and AVS1
  • HubCircuit and AVS2
  • AVS1 and AVS2
  For OnPremises to use Global reach and connect to AVS1 and AVS2
• See :
• To establish connectivity between AVS1 and AVS2 (in same region), consider using AVS InterConnect
  • See : Connect multiple Azure VMware Solution private clouds in the same region

Wrt number of connections,

Global Reach connections count against the limit of virtual network connections per ExpressRoute Circuit. For example, a 10 Gbps Premium Circuit would allow for 5 Global Reach connections and 95 connections to the ExpressRoute Gateways or 95 Global Reach connections and 5 connections to the ExpressRoute Gateways or any other combination up to the limit of 100 connections for the circuit.

See : Virtual networks links allowed for each ExpressRoute circuit limit.

Kindly let us know if this helps or you need further assistance on this issue.

Thanks,

Kapil

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