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Aruba Employee

Is it possible to use two gateways on the controller?

Customer wants to make one VLAN users to go through a different gateway. is it possible?

Aruba Employee

Re: Is it possible to use two gateways on the controller?

Is the L3 gateway for the VLAN on the Aruba controller?  If so, then you will not be able to do this.  Best way to do this is to terminate the L3 gateway on the upstream device/router.  As far as I know Aruba does not yet support PBR or source base routing.

 

-Mike

Aruba Employee

Re: Is it possible to use two gateways on the controller?

L3 gateway is aruba controller but if it is possible by any means we can change the configuration if we have to, how can it be done when we change the L3 gateway to the device/router? ( configuration side ).

 

Thanks for ur  help

Aruba Employee

Re: Is it possible to use two gateways on the controller?

Let's assume VLAN100 is the VLAN you want to make the modifications to:

 

- VLAN100

- Network: 192.168.100.0/24

- Gateway: 192.168.100.1/24 (Terminates on the Aruba controller)

- Assuming you use an external DHCP server to hand out IPs for VLAN100

 

You have 2 ways to make this changes:

Option1:

  • Remove the L3 IP for VLAN100 (if it's not required for any other functionality)
  • Assign the L3 IP to your upstream router/gateway
  • Trunk VLAN100 to the Aruba controller so the router and Aruba controller are part of VLAN100
  • Update routing for VLAN100 (core/upstream)

 

Options2:

  • Trunk VLAN100 to the controller so router/controller are part of VLAN100
  • Assign a different IP to the router for VLAN100
  • On DHCP server, change the gateway to the IP of the router in VLAN100
  • Update routing for VLAN100 (core/upstream)

With Option1 the controller is just L2 in VLAN100.  With Option2 the controller remain L3 but is not the default gateway for the VLAN100.  You may require Option2 if you're using Captive Portal.  Otherwise, go with Option1 unless there is a need to a VLAN100 IP on your controller.  No other changes are required on the controller. 

 

Hope that helps.

 

-Mike

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