sswitch ports

[Tbpfityoo]

Hi all,

could you please help me what the speed of the SFP port in this switch model:

Catalyst 3750 WS-C3750G-24TS-E1U

as the descryption it's
●24 Ethernet 10/100/1000 ports
●4 SFP-based Gigabit Ethernet ports

thank you

[Leo Laohoo · Accepted solution]

could you please help me what the speed of the SFP port in this switch model:

The SFP port can support 100BaseFX SFP and regular 1 Gbps SFP.  

[Tbpfityoo]

so I have 4 SFP ports with 1Gbps.

What about this module Catalyst 3750X, there are 4 SFP modules and two of them are:

- Two 10GbE SFP+ ports network module with four physical ports with two SFP+ and two regular SFP ports ( what it's mean by physical ports ?? how many ports exactly I have for SFP)

- Service Module with two 10GbE SFP+ ports network module for Netflow and MACsec encryption ( I have here just 2 SFP ports ? what it's mean by "Service Module with")

[Leo Laohoo]

- Two 10GbE SFP+ ports network module with four physical ports with two SFP+ and two regular SFP ports ( what it's mean by physical ports ?? how many ports exactly I have for SFP)

You have several options:  

1.  You can have up to 4 SFP; or

2.  Two SFP+; or

3.  Two SFP and one SFP+

[Tbpfityoo]

the third option why just 1 SFP+ ?

it's mentioned here:

two SFP+ and two regular SFP ports

isn't supposed to be 2 SFP+ and 2 SFP ?

[Tbpfityoo]

Thank you so much Leo for your help :)

[Bilal Nawaz]

I think with the C3KX-NM-10G you can have x4 1gb SFP pluggable ports, or x2 10gb SFP+ ports.

I haven't tried or read anywhere, but you might be able to do x2 1gb port + x1 10gb port.

Hope this helps.

edit.. ah! Leo beat me to it :)

[Tbpfityoo]

the same question for Leo :/

what about this model C3KX-SM-10G ?

[Bilal Nawaz]

You can only use one 10Gb per 2 ports, I think its for architecture/through-put performance reasons that this is the case.

The C3KX-SM-10G seems like it only offers x2 10Gb ports.

[Tbpfityoo]

so this

3.  Two SFP and one SFP+

it's doesnt mean that we have 3 ports ( one 10 gb and 2x 1gb ) it's as you said ( one 10gb per 2 SFP ports ? )

it's 2 port SFP and one of them can be SFP+  ?

[Bilal Nawaz · Accepted solution]

Exactly. Altogether there are 4 ports. All of them can do 1gb, only 2 can do 10gb.

If you were to use one for 10Gb, then you are using 2 ports up. (even though 1 10Gb link is plugged in)

See below. If you use all 4 as 1gb it will be fine. If i decide to use port 2 as 10Gb then I will not be able to use port 1 for anything.

[Tbpfityoo]

very Clear now :)

thank you so much, many thanks Bilal

[Leo Laohoo]

Sorry, I just woke up. 

Do I need to respond?  Bilal covered everything.  :)