Extending Network from Location1 to Location2

[rajesharihant]

Dear Experts, 

Kindly, review the attached Network Arch. as it explains what I am struggling to establish. 

I have an Industrial Network at a location-1 which I need to extend to Location-2.

The bottleneck is, I have only 1 pair of Fibre available, which is already being used by IT Network. 

Also, note that Industrial network is configure in VLAN1 (Which I prefer not to change). and ofcourse the IT Network also have VLAN1 configured in their network switches. We dont mind introducing extra routers. 

What shall I introduce to connect the L2 switch of Industrial network with L3 switch of IT network at lcoation-1, so that from Location-2 L3 Switch, I can access the Industrial network. 

Please advice on how to do it safely so that the IT network and Industrial network despite connected to each other - doesn't disturb either of the users. 

Regards,

[balaji.bandi]

If you do not like to change VLAN configuration,

how about considering VRF ?

Firewall ?

[Giuseppe Larosa]

Hello @rajesharihant 

you can consider to use L2TPv3 between two routers

see

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/wan_lserv/configuration/xe-16-6/wan-lserv-xe-16-6-book/wan-l2-tun-pro-v3-xe.html#GUID-34A363C2-B644-4549-9065-D9F83B390396

You will deploy a router R1 in location 1 and a router R2 in location 2.

Each router will have a loopback address used to create the tunnel.

each router will have an access L2 interface of type ethernet (GE or FE)

the industrial switch uplink will connect to the local R1 access interface and via the L2TPv3 the frame is carried to R2 that will de-encapsulate and deliver ethernet frame to the industrial ethernet switch in location 2

Hope to help

Giuseppe

[rajesharihant]

Thanks for your explanation. I will check for more details about this. 

Just so to clarify,

1. It requires to add a new router at each location right?

2. The solution enables data exchange in both direction, from Location1 to 2 and vice versa. 

appreciate your valuable time. 

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@Giuseppe Larosa wrote:

Hello @rajesharihant 

you can consider to use L2TPv3 between two routers

see

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/wan_lserv/configuration/xe-16-6/wan-lserv-xe-16-6-book/wan-l2-tun-pro-v3-xe.html#GUID-34A363C2-B644-4549-9065-D9F83B390396

You will deploy a router R1 in location 1 and a router R2 in location 2.

Each router will have a loopback address used to create the tunnel.

each router will have an access L2 interface of type ethernet (GE or FE)

the industrial switch uplink will connect to the local R1 access interface and via the L2TPv3 the frame is carried to R2 that will de-encapsulate and deliver ethernet frame to the industrial ethernet switch in location 2

Hope to help

Giuseppe

---

[Giuseppe Larosa]

Hello @rajesharihant ,

answer to your questions is :

1)yes you would need two routers with appropriate licenses to be able to run L2TPv3

2)  yes the service will be a bidirectional L2 point to point service between the two locations

Hope to help

Giuseppe

[balaji.bandi]

@Giuseppe Larosa  , since in the network diagram he did not have any Router in place, so i have not suggested, good to consider as you pointed, looked only easy win situation here.

[Giuseppe Larosa]

Hello @balaji.bandi ,

in initial post I have noticed the following sentence

>> We dont mind introducing extra routers.

So I started to think about L2TPv3 as possible option.

The only isssue I see with VRF is that is still a routed L3 solution and the OP is asking for L2 extension so an EoMPLS pseudowire could be an alternative to an L2TPv3 tunnel

Best Regards

Giuseppe

[balaji.bandi]

@Giuseppe Larosa apologies and  agreed - may be ignored the part was router can be introduced.

Other suggestion - i used way back fiber spltter (kind of Mux)

[Giuseppe Larosa]

Hello @balaji.bandi ,

if switches are directly connected with the existing fiber pair 802.1Q tunneling could be used assigning a customer VLAN to the industrial ethernet portion of the network in each Location. 80.21Q tunnel ports would be on ICT switches.

Hope to help

Giuseppe

[rajesharihant]

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@balaji.bandi wrote:

@Giuseppe Larosaapologies and  agreed - may be ignored the part was router can be introduced.

Other suggestion - i used way back fiber spltter (kind of Mux)

---

Thanks balaji.bandi 

For the alternate solution. 

Can you just explain a little bit on this. 

Is there any product available to extend two networks via a single fibre?, which we can place on either side so as to establish the requirement?

if it is straight forward and cheap without any significant disadvantage - then this also shall be considered. 

appreciate if you can spare your valuable advice. Thanks for your time. 

[balaji.bandi]

Look the one i have used No Longer manufactured, it was taiwan based good product, used many conversion where fibre is very critical and demand increases.

example products to look  as below :

http://www.e1-converter.com/Fiber_mode_converter/Fiber_Mode_converter.html

https://www.omnitron-systems.com/solutions/convert-dual-fiber-to-single-fiber#dual-fiber-to-single-fiber-application