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Propagate all IPv6 address spaces via Expressroute

Aleksandar Nikolovski 0 Reputation points
2024-12-06T15:41:24.68+00:00

I have Expressroute connected to on prem router. Expressroute is connected via Expressroute gateway to test VNET which is in dual stack. I am able to see only default gateway IPv6 prefix being advertised to on prem router. What should be done so all IPv6 prefixes are advertised?

Azure ExpressRoute
Azure ExpressRoute
An Azure service that provides private connections between Azure datacenters and infrastructure, either on premises or in a colocation environment.
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  1. ChaitanyaNaykodi-MSFT 26,936 Reputation points Microsoft Employee
    2024-12-06T20:59:20.38+00:00

    @Aleksandar Nikolovski

    Thank you for reaching out.

    You can try below below steps and see if those help in resolving the issue here.

    • If there is any firewall implemented on-prem validate if it is not blocking the route advertisements.
    • As documented here "Specifically, make sure to create your virtual network and subnet, or add IPv6 address space to your existing virtual network and GatewaySubnet, prior to creating a new virtual network gateway in the portal." sometimes deleting and recreating the ExpressRoute gateway can help.
    • If above does not help, creating a support request might help in this case a support engineer can take look at the backend logs and help pin-point the issue.

    Please let me know if you have any questions. Thank you!

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