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Frequent Contributor I
Posts: 70
Registered: ‎02-28-2012

Multiple GRE Tunnels (Redundancy GRE Tunnel)

Hi,

I was asking by one of my customer about redundancy GRE Tunnels. The goals is to pass specific VLAN X for remote controller inside the tunnel from :

- DC Site (Controller A), - or if this controller down 

- DRC Site (Controller B).

 

All controller are connected to L2 MPLS network.

But the subnet are different for the VLAN X from DC or from DRC site.

Anybody has done something similar like this? Is it even possible?

 

 

 

Thanks

 

 

 

Frequent Contributor II
Posts: 114
Registered: ‎12-02-2011

Re: Multiple GRE Tunnels (Redundancy GRE Tunnel)

[ Edited ]

Do you have VRRP for the DC controllers? If so you can use the VRRP address as the destination of the tunnel.

Frequent Contributor I
Posts: 70
Registered: ‎02-28-2012

Re: Multiple GRE Tunnels (Redundancy GRE Tunnel)

No.

DC/DRC controllers are on a different location/network.

Frequent Contributor II
Posts: 114
Registered: ‎12-02-2011

Re: Multiple GRE Tunnels (Redundancy GRE Tunnel)

You said that the controllers are on L2 MPLS network, can not you configure VRRP in this case (a specific VLAN)?

 

I'm not aware any priority settings with L2 GRE, I'm afraid you can't do that. With L3 GRE you could use different costs for the routes which directs the traffic to the tunnels.

Guru Elite
Posts: 21,279
Registered: ‎03-29-2007

Re: Multiple GRE Tunnels (Redundancy GRE Tunnel)

This is not possible with an Aruba Controller.  If you have a device that can do that, you should connect the Aruba controller to it and allow the device to provide the GRE tunning redundancy.

 



Colin Joseph
Aruba Customer Engineering

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Moderator
Posts: 933
Registered: ‎07-29-2010

Re: Multiple GRE Tunnels (Redundancy GRE Tunnel)

[ Edited ]

Hi

 

Stupid question: If you have L2 MPLS between your sites, and VLAN 10 can be extended throughout your sites, why would you need GRE tunnels? It seems to me that the simplest thing would be to use extended VLANs... Is there anything I've missed?

 

Regards

Samuel Pérez
ACMP, ACCP, ACDX#100

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Moderator
Posts: 933
Registered: ‎07-29-2010

Re: Multiple GRE Tunnels (Redundancy GRE Tunnel)

In any case, taking into account what you're trying to do, it seems to me that the simplest thing to do would be to have your APs associating the controllers in DC A and B.

 

I mean, if clients are logically going to be in either one of the datacenters, there is no real need for a local controller... Don't you agree?

Samuel Pérez
ACMP, ACCP, ACDX#100

---

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If you find this post useful, give me kudos for it ;)
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