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Add another routed subnet to physical interface

Hello,

I have a Sophos UTM SW with 3 network interface, eth0 for lan (192.168.1.0/24), two for wan ( eth1 on j.x.y.z/24 and eth2 on n.x.y.0/30).

The two wan are configured with own default gateway, uplink balancing uses either interface and multipath roules states that j.x.y.z/24 is default and n.x.y.0/30 has as source some internal IP, and this configuration works fine.

The focus is on eth2 with sophos ip n.x.y.2, n.x.y.2/30, that has gateway n.x.y.1, since we need to add another subnet on this interface we ask to provider to extend range, but in reply

provider states that added a "routed subnet" (that is n.x.y.80/29, so with disjoined ranges) and routed all traffic regarding this last subnet to the sophos on n.x.y.2 .

I've tried to configure a new vlan interface on the n.x.y.80/29 (with ip .81) , add additional address and a lot of static routes, pbr routed and masquerading with no success.

So, 2 questions:

What's the correct way to configure this kind of "routed subnet" to use (e.g. ping) IP addresses n.x.y.80/29 (so 81-86) from outside?

And:

Why I cannot ping ip address of the interface selecting ip of the vlan just configured? What I'm missing?

Thank you,

Emanuele



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