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Two internal interfaces bridge with same dhcp and subnet

Joosep1

Hi!

I have a Server 2016 Hyper-V host.

Right now Sophos UTM9 VM, has three virtual NICS.

1) WAN - External Hyper-V virtual switch, dedicated physical nic

2) LAN - Internal Hyper-V virtual switch

3) LAN2 - External Hyper-V virtual switch, dedicated physical nic

UTM works great with NIC1 and 2, i have internet and lan connection for all the virtual machines.

Now i am not sure, that i can do it, but this is why i started this question topic.

 

Can i get the NIC3, that is actually bounded to physical nic, to extend the same internal lan to external switch so i can extend my virtual network to other physical devices.

I tried to configure second nic, at sophos it is Internal interface as bridge with the additonal nic three.

All my virtual machines have internet and lan connection, but for the third nic, there is no connection at all.



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  • 0

    In interfaces Edit "Internal Network".
    Under "Type" Dropdown to Ethernet Bridge. Than "Bridge selected NICs" check the desired NIC's. And you should get a picture like the attachment.
    No further configuration is needed 

     

     

  • 0 in reply to Ol Deda

    Hi

    Thank for the reply, but i have done this already, but i do not get any network connection from the third nic.

  • 0 in reply to Joosep1

    To form a bridge, both NICs need to be unused.   To deal with the loss of connectivity during the transition, I also needed to create a management access port, for a total of three new ports.  Do you really have a BR0 or BR1 interface created, one that looks like the picture?   You never mentioned creating any unused interfaces, so I wonder if it ever happened.   

    After the bridge is created, it defaults to only forwarding IPv4 packets.  You need to use the "Advanced Bridge" section of the interface properties window to specify the Etherypes that are forwarded.   Do a Google search for "Ethertype List" and follow the links for IANA.ORG.  You probably want to add at least ARP and Reverse ARP.   This is the second possible explanation for your symptoms.   You did not specify the exact traffic that was failing.

    I don't know that UTM implements Spanning Tree Protocol.   I would not recommend using a wiring configuration that makes STP necessary.

    There may be an issue with UTM providing DHCP services for both sides of a bridge.   This is based on my recollection of an earlier discussion in this forum, not based on experience.  Search the forum to investigate.

  • 0 in reply to DouglasFoster

    I think it is a HyperV  misconfiguration. What I see he is trying to do the bridge in Wan designed interface (if im not wrong)

    Consider implementing VLAN

  • 0 in reply to DouglasFoster

    I tried to add additionl entries to Ethertype List, but it didnt help.

     

    To form a bridge, both NICs need to be unused.   To deal with the loss of connectivity during the transition, I also needed to create a management access port, for a total of three new ports.  Do you really have a BR0 or BR1 interface created, one that looks like the picture?   You never mentioned creating any unused interfaces, so I wonder if it ever happened.  

    Could You point me to any guide for this, as previous post by a user told, that there should not be any other configuration needed.

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  • 0 in reply to DouglasFoster

    I tried to add additionl entries to Ethertype List, but it didnt help.

     

    To form a bridge, both NICs need to be unused.   To deal with the loss of connectivity during the transition, I also needed to create a management access port, for a total of three new ports.  Do you really have a BR0 or BR1 interface created, one that looks like the picture?   You never mentioned creating any unused interfaces, so I wonder if it ever happened.  

    Could You point me to any guide for this, as previous post by a user told, that there should not be any other configuration needed.

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