Stackwise Virtual Design Question

[hidemitsun]

Hello all,

We plan to build SVL connection using 10GBASE-LR between two buildings at 4km intervals.

Following are SVL connections:

#1 Switch                                                 #2 Switch

C9500-16X-A                                          C9500-16X-A

SFP-10G-LR ---- SMF(4km cable) ---- SFP-10G-LR

SFP-10G-LR ---- SMF(4km cable) ---- SFP-10G-LR

SFP-10G-LR ---- SMF(4km cable) ---- SFP-10G-LR

Is it possible to build SVL connections at 4km intervals?

Thank you,

[Joseph W. Doherty]

I don't know, but virtual switch distance limitations, if any, came up in another thread. In that thread, I noted there might be some minimum latency requirement for virtual switch, by if there is, I think it likely 4km would meet such.

[Reza Sharifi · Accepted solution]

Hi,

There is no distance limitation. As long as you have the right optics, you can one km, 4km or 20km, etc..

HTH

[Joseph W. Doherty]

Reza, you're sure even 20,000+ km (yes opposing sides of earth) would be okay?

[hidemitsun]

Thank you very much for your help.

Understood,I will build the SVL connections using 10GBASE-LR.

[Reza Sharifi]

Joe,

I don't know if I have seen a 10Gig SFP+ that support 20k km. Table-1 shows the max is 80km. 

Reza

[Joseph W. Doherty]

Yea, normal max is about 80km for a fiber link, however I have in mind a WAN cloud providing a logical L2 p2p. For such, you could have a connection half way around the world.

[hidemitsun]

I understand that the VSL connection is the ethernet connection.

Therefore, cable distance(limitation) depends on the transceiver.

Cable distance    SFP                  Cable type

400m                  SFP-10G-SR    MMF

10km                  SFP-10G-LR     SMF

40km                  SFP-10G-ER     SMF

I have come to a conclusion that we build the SVL connection at distance of 4km using 10GBASE-LR SFP.

[Joseph W. Doherty]

"Therefore, cable distance(limitation) depends on the transceiver."

Correct, if you're using those optics on a dedicated fiber link. However, again, if using a provider cloud, you might have a L2 connection much, much longer distance (even with SR optics). Also, BTW, ZX or DWDM, I believe, will get you to 80 km on a single fiber.

[hidemitsun]

Thank you very much for your help.

I will build the VSL connection at distance of 4km using L1 connection.