CWDM and Cisco 9500

[bekzat-shamgun]

Hi all,

Can you please help me with equipment required to connect two Cisco 9500 located in 100km to each other by using CWDM.

I would appreciate if you could share what i should purchase and how it should be configured(both, switch and cwdm mux/demux).

Also i'm looking for cwdm equipment from Cisco, not 3rd parties, do cisco have any? Please make a list if possible.

Best regards,

BS

[marce1000]

          - Perhaps this document can give you some initial insights and info's :
                https://www.cisco.com/c/dam/en_us/about/ciscoitatwork/downloads/ciscoitatwork/pdf/cisco_it_case_study_cwdm.pdf

 M.

[bekzat-shamgun]

thanks for material, are there any details available of that solution?

[Joseph W. Doherty]

I've only a cursory knowledge of OTN, have some experience using CWDM and DWDM transceivers connecting to an in-house regional or national OTN managed by a different network team, but I believe you need to be more precise what your needs and goals are.

Are you looking to build out the physical OTN?  Only need to support one logical p2p link?  Bandwidth?  Not using any service provider?  You have right of way?

Basically, if yours is a situation where you only need to select CWDM transceivers, that's often straight forward, but building out a OTN, is a little more complicated.

I believe, for 100K, you'll need a repeater.  If so, then you have the issue where it's housed.  You can also get into issues such as whether you OTN will provide redundancy.

If your concern is just providing a single p2p, CWDM is overkill.

Again, I'm not an OTN engineer, but suspect you should discuss your needs and goals with one, first considering whether a OTN makes sense.

Lastly, Cisco years ago did have their own OTN equipment, but I don't know their current status.

[bekzat-shamgun]

If your concern is just providing a single p2p, CWDM is overkill.

Can you explain why it's overkill for p2p connection? Any other solutions available for communication on 100K distance?

[Joseph W. Doherty]

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@bekzat-shamgun wrote:

If your concern is just providing a single p2p, CWDM is overkill.

Can you explain why it's overkill for p2p connection? Any other solutions available for communication on 100K distance?

---

As I believe you'll need a repeater to support CWDM at 100K, you could do the same with ZX optics.

Also Cisco notes its ZX will do up to 100K on premium SM fiber, see: https://www.cisco.com/c/en/us/products/interfaces-modules/1000base-zx-sfp/index.html

Also, there are other optical transceivers that claim 100K distance.  My browser AI notes:

100km Fiber Optic Transceiver

Based on the provided search results, here are some key points about 100km fiber optical transceivers:

Multi-Vendor MSA Compatibility: Many 100km fiber optical transceivers are Multi-Vendor MSA (Multi-Source Agreement) compatible, ensuring interoperability with various networking equipment.

Double Fiber Single-Mode Fiber (SMF) Operation: Most transceivers operate over double fiber SMF optical cables, supporting distances up to 100km.

Examples of 100km Fiber Optical Transceivers:

1. 10GFH-SFP-100: A Multi-Vendor MSA compatible SFP+ double fiber transceiver supporting 1.228-10.138 Gbps data rate in 100km distance over SMF.
2. 10G-SFP-100: A Multi-Vendor MSA compatible SFP+ double fiber transceiver supporting 1.25-10.31 Gbps data rate in 100km distance over SMF.
3. FS SFP-10GZRC-55: A 10G SFP+ transceiver module with a 1550nm wavelength, supporting 100km distance over OS2 SMF.

[Leo Laohoo]

Before starting, please furnish the following information: 

1.  What is the exact firmware version of the switch? 

2.  What is the exact wavelength, speed (100 Mbps, 1-, 10-, 25-, 40- or 100 Gbps)?

3.  Cisco-branded or 3rd party?

[bekzat-shamgun]

Gents, i'm also not OTN engineer, i'm control system engineer in OT.

At this moment we have two sites with root Cisco 9500 switches and they are connected by fiberoptic directly to each other.

Bandwith is 1Gbps, but download speed are 40MBps which is 3 times less than it supposed to be.

Now i'm looking for improvement of that connection and looking solution to utilize same fiberoptic to increase download speed.

As per documentations in internet, i see that we will need to install CWDM mux and demux, and also install CWDM transceivers in switches, but i cannot find any detailed guide for it. Also i'm looking if anyone can share which vendor to choose for CWDM mux and demux and for best practices.

Best regards,

BS