Twin-Datacenter CPE Redundancy

[DPS455]

Hi Cisco Community Members,

I have the follow question, search the internet but not found a good solution.

Design:

- Two Data Centers (A) and (B) geographically 20km

- One Single mode Fiber from Customer-CPE-Switch to Data Center (A) Core Switch

 And a Second Single Mode Fiber from Customer-CPE-Switch connect to Data Center (B)

Requirements:

- Deliver Redundancy to CPE Customer (Singel Switch with 2 Fibers Single Mode Bidi)

- Deliver more then 1Gbit bandwidth Active/Active connection. 

Question:

With solution is the best one to deliver multipath en Layer 2 LACP redundancy to the customer CPE Switch? i have read about Multilayer vPC but this is only a extension of layer 2 over 2 Data Centers.

I want connect the CPE of the Customer on Data Center A and Data Center B for redundancy. Normally what i have see is that the Peer-Link and the Keepalive link is inside the Data Center.

I hope somebody can helping with technology is the simple and best choose.

Gr.

[Francesco Molino]

Hi

Your cpe are directly connected to your dc with private l2 links right?
You're taking about vpc, this means you're using Nexus switches?
How are they connected together between DC A and DC B?
can you share a quick design to see how many Nexus are in dc A and in dc B?
If it's layer 2 links between dc and cpe, and based on your design, doing vpc on dc switches and port-channel on router would be correct. But better answering your question in the best way, I'll wait for your answers

[DPS455]

Hi Francesco,

Thanks for reply on this post!

On this moment i'm searching for a good solution,

maybe vPC is not directly the best choose.

Answers:

- Yes, the CPE is connected with Dark Fiber L1 and L2 directly to two different Data Centers.

  The two data centers are seperate 20km geo

- Yes, Maybe vPC from Nexus is the technology to use.

- DC A and DC B are connect together on a Fiber Ring (10x 10GB Fiber Single Mode Capacity)

vPC is one solution (maybe limit with the peer-link and 2 nodes), maybe there is other solution to make this line redundant.

[Francesco Molino]

Hi

Between DCs you have 20km distance but which types of link do you have?

If it's a dark fiber for example you'll need to use sfp 10 ER as they can be used with single mode fiber for 40km. These sfps are very expensive. The usual one LR supports up to 10km.

In terms of Technology, you can have VSS or VPC.

There's also ASR but need to confirm if 20km is ok. I guess yes, but i only deployed it few kilometers distance.

Then to choose the right box, you'll need to explain what feature you're looking for?