As of late had a need to build up a GRE burrow between two destinations. The reason being was conveying a Meru Wifi verification of-idea where AP's were on one site, and the controller on a remote site.

Ordinarily, the availability between AP's the controller would go over the current steered system (layer 3 mode in Meru-talk), yet for this situation, it wasn't conceivable to get the new subnet doled out to the controller overhauled with the ISP giving the private connections.

As the client was utilizing Juniper EX switches and had a Juniper SRX firewall at the remote (controller) site, GRE permitted us to manufacture the system without the need to include the ISP.

The accompanying topology was utilized –



GRE was added to the EX switch highlight set in JunOS 12.1 (connection here). So as to utilize it, you have to allot a physical port to be committed for passage administrations. For my sample, I've utilized port ge-0/0/14 on the switch

set body fpc 0 pic 0 burrow port 14 burrow administrations

The JunOS 12.1 documentation above characterizes we dispense a port by means of it's fpc and pic designation. For my situation, the switch was a solitary switch so the fpc was '0'. In a Virtual-Chassis environment, the fpc number would change. For instance, in the event that you needed to utilize port 47 on switch 4, the summon would be 'set suspension fpc 4 pic 0 burrow port 47 burrow administrations'.

With the port designated, we can then form the GRE arrangement.

set interfaces gr-0/0/14 unit 0 burrow source 10.11.3.101

set interfaces gr-0/0/14 unit 0 burrow destination 10.44.128.1

set interfaces gr-0/0/14 unit 0 family inet address 10.11.12.1/24

On the SRX-side, the design is as per the following.

set interfaces gr-0/0/0 unit 1 burrow source 10.44.128.1

set interfaces gr-0/0/0 unit 1 burrow destination 10.11.3.101

set interfaces gr-0/0/0 unit 1 family inet address 10.11.12.2/24

Each GRE interface has a passage source and destination set (this is the steered interface of the gadget at every end) and an inet address relegated to the interface which is utilized to set up the passage (10.11.12.1 and 10.11.12.2 for my situation). I've utilized unit "1" on my SRX, as I as of now have some GRE burrows worked to different destinations. A GRE interface utilizes the same unit task as a switch or inet port in JunOS, they can be utilized for various association purposes.

GRE burrows appear "UP" promptly, regardless of the possibility that the setup isn't set effectively, so don't expect as it's UP, it will work. Take a gander at the Input/Output bundle tally to accept movement stream.