effective routes on network interface

WinTechie 276 Reputation points
2021-08-26T21:28:24.873+00:00

Hi,

I have provisioned few VM's and assigned private IP's to them. when I look for effective routes on these VM's i see source address with only "Default".

I have provisioned an Expressroute VNET gateway in the same VNET (no connection/peering is created with circuit as of now)

when i compare this to my other environment (different subscription which is connected to expressroute circuit), i see many routes and source being "virtual network gateway" as system learnt routes

forgive my lack on n/w knowledge, Is it something i would observe when i actually create a connection to circuit and then these routes will be updated.

I also need internet connectivity on these VMs when i run pathping from one of the server, traffic is halted/terminated at first hop which is the local IP of the system. please suggest

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An Azure service that is used to provision Windows and Linux virtual machines.
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  1. SaiKishor-MSFT 17,156 Reputation points
    2021-08-27T10:17:21.003+00:00

    @WinTechie Thank you for reaching out to Microsoft Q&A. Please see below:

    I understand that you are having questions regarding the effective routes seen in the route table.

    127040-image.png

    As shown above, Once the Express Route or Virtual Network Gateway circuit is established and routes are advertised to Azure, these routes are added with source as Virtual Network Gateway into the route table.

    Regarding internet connectivity, do you need traffic to go over the internet direclty without the express route connectivity? If so, you need to add a Public IP to the VM so that it can be routed via the internet.
    If you need it to be routed via the Express Route circuit, you need to setup the circuit on both sides and advertise appropriate routes so the traffic can take this path. Hope this helps.

    Please let us know if you have any further questions and we will be glad to assist you further. Thank you!

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