Topic 'How to connect cisco 3500 and 3700 switch via fiber.' in forum 'Networking' - dslreports.com

Re: How to connect cisco 3500 and 3700 switch via fiber.

Fri, 15 Nov 2013 16:24:22 EDT

LazMan posted : What make/model SFPs?

Re: How to connect cisco 3500 and 3700 switch via fiber.

Thu, 14 Nov 2013 18:03:59 EDT

yurimaster posted : Got two SFP modules for inserts and a LC to LC mm fiber cable

Re: How to connect cisco 3500 and 3700 switch via fiber.

Wed, 13 Nov 2013 14:30:30 EDT

tomdlgns posted : what did you end up buying?

Re: How to connect cisco 3500 and 3700 switch via fiber.

Wed, 13 Nov 2013 12:00:48 EDT

yurimaster posted : Thanks for all the advice, I now got what I needed.

Re: How to connect cisco 3500 and 3700 switch via fiber.

Wed, 13 Nov 2013 07:35:35 EDT

Da Geek Kid posted : If this is for production. I would recommend single mode fiber with LX/LH SFP. Single mode fiber can support to over 100Gbps so no need to replace it for a long while. It generally is cheaper.

Re: How to connect cisco 3500 and 3700 switch via fiber.

Wed, 13 Nov 2013 03:49:40 EDT

public posted :

said by yurimaster:

Cisco docs says it uses LC fiber connectors. I was wondering if this »www.newegg.com/Product/P ··· 50NV9797 are the right connectors I need? I will be ordering the right fiber cable and connectors pre terminated once I get the correct info. Can I just plug one end directly in to the Cisco switch or I need to put something in to those ports? I notice inside those SFP ports there are metal/copper connectors so obviously something must go in there before I can plug the fiber.

Yes the LC connectors will work. Also multimode cable and SFPs are ok at 1000ft.
Plug the SFP into the slot, and the cable into the SFP.
Cisco switches check the vendor field of the SFP nvram, so generic make will give you an error.
Some switches allow disabling the error check. If not sure, you will need genuine Cisco label, not Linksys, jds or other.

Re: How to connect cisco 3500 and 3700 switch via fiber.

Tue, 12 Nov 2013 23:25:34 EDT

GM85 posted : There are different specifications of optical networking so you will need to find which specification is best for you.

Fiber comes in two different forms: Single-Mode and Multi-Mode. Single-Mode uses lasers (I.E. a single beam of light) to transmit data over a considerable distance. Multi-Mode uses LEDs (I.E. multiple beams of light) to transmit data over shorter distances, usually under 1000m (3000ft).

When deciding to use a certain gigabit specification, you need to make sure the fiber matches that specification.

Take a look at this document: »www.cisco.com/en/US/prod ··· l#model2

This document also indicates the compatible SFPs for the 3560 and 3750.:»www.cisco.com/en/US/docs ··· wp137285

You essentially have 3 options:
1000Base-SX (GLC-SX-MM module) uses 50um multi-mode cable and can operate up to up to 550m
1000Base-LH (GLC-SX-MM module) can also use multi-mode cable up to 550m and single-mode up to 10km.
1000Base-ZX (GLC-ZX-SM module) can use single-mode cable up to 70km, however it is not recommended in this situation since using such a short length of cable will overload the transceivers.

So you need to decide what cable you want to use. The cable you linked to was a multi-mode cable, so it would be compatible with the 1000Base-SX and LH modules. (as a side note, I've implemented SX and ZX connections before but have not used LX/LH connections, however it should be fine as long as the cable matches the specifications).

Re: How to connect cisco 3500 and 3700 switch via fiber.

Tue, 12 Nov 2013 19:06:23 EDT

tomdlgns posted : you need the sfp module that goes into the port for both sides (you will need to purchase 2). the fiber then plugs into the sfp module.

i will let a cisco or more knowledgable person answer the sfp module part, i have never worked with cisco switches.

here is a link to one...»www.newegg.com/Product/P ··· 33124059

note- i am not saying this will working, just linking it for reference.

there might need to be a certain fiber type you need, as well. i am sure someone will confirm that when they make it in here.

How to connect cisco 3500 and 3700 switch via fiber.

Tue, 12 Nov 2013 16:57:43 EDT

yurimaster posted : I hope someone here can shine the light. I'm trying to connect two Cisco switches that are about 1000 feet apart. One is a 3560 and the other is a 3750G. I have never touch the fiber stuff on cisco before. I see that both switches have SFP ports and Cisco docs says it uses LC fiber connectors. I was wondering if this »www.newegg.com/Product/P ··· 50NV9797 are the right connectors I need? I will be ordering the right fiber cable and connectors pre terminated once I get the correct info. Can I just plug one end directly in to the Cisco switch or I need to put something in to those ports? I notice inside those SFP ports there are metal/copper connectors so obviously something must go in there before I can plug the fiber.

I have attached a pic on what the ports looks like.