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thrasos_l
thrasos_l
New Member
August 16, 2021
Question

Single ISP with multiple WAN subnets shared between vDOMS?

  • August 16, 2021
  • 1 reply
  • 2417 views

Say I have an ISP that routes me additional public IP blocks via: 1.1.1.1/30

 

Public routed IP blocks:

2.2.2.2/27

3.3.3.3/27

 

The wan interface is currently associated to VDOM: A  

 

Is there a way to to share the 3.3.3.3/27 subnet with VDOM: B ?   I tried a emac-vlan link but that doesn't seem to allow me to route to the primary interface via the subinterface.

 

The way I would normally handle this is creating VLAN interfaces on a switch or router and serve them up to each VDOM as needed.

 

Thanks,

    1 reply

    lobstercreed
    lobstercreed
    New Member
    August 19, 2021

    If I'm understanding this right, it seems like you could definitely create an inter-VDOM link between A and B, and put in a static route in VDOM A sending 3.3.3.3/27 to VDOM B via that link.  This assumes then that VDOM B uses the link as its default route (or at least part of an SD-WAN).

     

    This does not avoid the traffic traversing VDOM A (i.e. go straight from ISP to VDOM B), if that's what you're trying to accomplish.  Pretty sure that wouldn't be possible without the ISP providing a separate /30 to VDOM B and routing 3.3.3.3/27 via that instead.

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