Author Topic: Help with trunk, 2 subnets on default VLAN  (Read 914 times)

diazocon

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Help with trunk, 2 subnets on default VLAN
« on: November 01, 2016, 04:53:41 pm »
Hello All,

I have been struggling to resolve an issue, but no matter how much I tried; it seams to be out of my scope hence this request for help   :-)

I have 4 EX2200 switches, trunked as couple in 2 different cabinets with different subnets each. After some review, I think that is best to cluster them as a Virtual Cluster. We do have available ports to release a switch and start the configuration from the ground up. The issue we are facing is that on a couple of switches, default network carries subnet 10.10.40.0/24 as default (VLAN 0) and the other couple carry 10.10.50.0/24 on the default VLAN (0).

If I trunk all the VLANS, I can see traffic from both networks but I'd like to put the traffic on 10.10.40.0/24 into a VLAN of its own, using the switch as gateway (lets say VLAN ID 40, / 10.10.40.252 and VLAN ID 50 / 10.10.50.252). The current gateway is a firewall on 10.10.{4,5}0.1 respectively; which I'd love to move to the switch on .252 on each VLAN.

I haven't been able to do this; every time I add an interface on the 40 network, it stops talking to the switch/trunk parter's traffic on the same 40 network (which makes sense, one is VLAN40, the other is VLAN 0).

Any advise? I have been playing with routes and VLANS, but as a SysAdmin, I am running out of Ideas...

thanks!