Interconnecting SFP, SFP+ and XENPAK/X2

[berniebbow1]

Is it possible to interconnect:

1. SFP+ and XENPAK/X2, e.g. SFP-10G-SR (Cat2960X or Cat3560X) and XENPAK-10GB-SR (Cat6500) or X2-10GB-SR (Cat3750E)?
2. SFP+ and SFP, e.g. SFP-10G-SR (Cat2960X or Cat3560X) and GLC-SX-MM (Cat6500 or Cat3750G/E)?
3. will GLC-SX-MM or GLC-LH-SM work in SFP+ slots (Cat2960X or Cat3560X)?

ad 1 - I do not mean cabling, I am asking about whether those two modules would "see" each other (establish a link)

ad 2 - it seems that SFP-10G-SR cannot "downgrade" itself to 1 Gbps speed.

ad 3 - will 1Gbps modules work in SFP+ slots?

[Ganesh Hariharan]

Is it possible to interconnect:
SFP+ and XENPAK/X2, e.g. SFP-10G-SR (Cat2960X or Cat3560X) and XENPAK-10GB-SR (Cat6500) or X2-10GB-SR (Cat3750E)?

SFP+ and SFP, e.g. SFP-10G-SR (Cat2960X or Cat3560X) and GLC-SX-MM (Cat6500 or Cat3750G/E)?

will GLC-SX-MM or GLC-LH-SM work in SFP+ slots (Cat2960X or Cat3560X)?

Hi Berniebbow,

SFP+ requires LC connector, the X2 may require an SC connector.Using two fibers with LC-SC terminations solve the issue.(LC connector on one fiber end, SC connector on the other fiber end).

You just need the correct optic on each side.  Also, if your optics are Single mode you need single mode patch cord.  If your optics are Multimode than you need Multimode patch cord.

Hope it Helps..

-GI

Rate if it Helps..

[berniebbow1]

SFP+ requires LC connector, the X2 may require an SC connector.Using two fibers with LC-SC terminations solve the issue.(LC connector on one fiber end, SC connector on the other fiber end).

I am aware of that. That was not my question though.

[Marvin Rhoads]

The SFP-10G-SR is 10 Gbps only. The GLC-SX-MM is 1 Gbps only. You cannot interconnect them.

The GLC-SX-MM is multimode LED-based. The GLC-LH-SM is singlemode laser-based. They may (sometimes) work with Mode conditioning patch (MCP) cables but it's not generally a good idea unless it's completely unavoidable.

[berniebbow1]

The SFP-10G-SR is 10 Gbps only. The GLC-SX-MM is 1 Gbps only. You cannot interconnect them.

That means one cannot force SFP-10G-SR to use 1Gbps speed?

[Marvin Rhoads · Accepted solution]

You cannot.

As I noted, "The SFP-10G-SR is 10 Gbps only."

It runs at 10 Gbps link rate and no other speed.

[Leo Laohoo]

That means one cannot force SFP-10G-SR to use 1Gbps speed?

This is a very common question and the response will always be the same:  GBIC, SFP/SFP+, X2, XENPAK, QSFP, CSFP modules will only negotiate to one speed, and one speed only.  

[berniebbow1]

I hope someone will answer my 1st and 3rd question.

[Marvin Rhoads · Accepted solution]

1. Yes

3. Yes