02-08-2018 04:19 AM - edited 03-08-2019 01:46 PM
Can anyone advise how the operation of the 10G modules work in a 3750-X?
I have a stack of 2 switches with a network module in each?
Firstly how do I check what network module there is installed?
Secondly what is the operation?
I know you can only have 2 interfaces that run 10G this is the output
Gi1/1/1 disabled 1 auto auto Not Present
Gi1/1/2 disabled 1 auto auto Not Present
Gi1/1/3 notconnect 1 auto auto Not Present
Gi1/1/4 notconnect 1 auto auto Not Present
Te1/1/1 *********** connected trunk full 10G SFP-10GBase-SR
Te1/1/2 *********** connected trunk full 10G SFP-10GBase-SR
Gi2/1/1 disabled 1 auto auto Not Present
Gi2/1/2 disabled 1 auto auto Not Present
Gi2/1/3 disabled 1 auto auto Not Present
Gi2/1/4 disabled 1 auto auto Not Present
Thanks
Solved! Go to Solution.
02-08-2018 04:41 AM
Hi Roger,
You can check which module is installed by using 'show inventory'
From the interface output below it would appear that you have a C3KX-NM-10G installed which provides 2 x SFP+ interfaces and 2 x regular SFP interfaces. The SFP+ interfaces support both 10GbE and 1 GbE hence the output of 4 x 1GbE interfaces and 2 x 10GbE interfaces. I believe that you can use the following interface combinations
2 x 10GbE and no 1GbE
4 x 1GbE and no 10GbE
1 x 10GbE and 2 x 1GbE
I hope that this helps
Will
02-08-2018 04:41 AM
Hi Roger,
You can check which module is installed by using 'show inventory'
From the interface output below it would appear that you have a C3KX-NM-10G installed which provides 2 x SFP+ interfaces and 2 x regular SFP interfaces. The SFP+ interfaces support both 10GbE and 1 GbE hence the output of 4 x 1GbE interfaces and 2 x 10GbE interfaces. I believe that you can use the following interface combinations
2 x 10GbE and no 1GbE
4 x 1GbE and no 10GbE
1 x 10GbE and 2 x 1GbE
I hope that this helps
Will
02-08-2018 04:58 AM
Thanks Will
And the 10g ports are port 2 & 4 on the Module?
Will they just show up at TE1/1/1 and TE1/1/2 if there is an SFP in the interface?
02-08-2018 05:18 AM
Hi Roger,
Yes, ports 2 and 4 on the module are SFP+
I believe that the ports will show up int the configuration/show interfaces as Te1/1/1 and Te1/1/2 regardless if an SFP/SFP+ module is connected or not.
The below is from the Cisco 3750-X Network Module installation notes which provides more detail on the operation of the ports:
The four slots are grouped as two pairs, with each pair consisting of one SFP slot and one SFP+ slot. Each pair supports either two 1-Gigabit SFP modules or one 10-Gigabit SFP+ module. A 10-Gigabit SFP+ module cannot operate at the same time as the corresponding 1-Gigabit SFP module in the pair.
Supported combinations of SFP and SFP+ modules:
•
Slots 1, 2, 3, and 4 with 1-Gigabit SFP modules
•
Slots 1 and 2 with 1-Gigabit SFP modules and Slot 4 with one 10-Gigabit SFP+ module
•
Slot 2 with one 10-Gigabit SFP+ module and Slots 3 and 4 with 1-Gigabit SFP modules
•
Slot 2 and Slot 4 each with 10-Gigabit SFP+ modules
A 10-Gigabit SFP+ module takes precedence over a 1-Gigabit SFP module except when an SFP module is first inserted in Slot 1 and has link. When you insert an SFP+ module in Slot 2, the SFP in Slot 1 retains link. The SFP+ module in Slot 2 does not operate.
When the SFP module in Slot 1 is shutdown, loses link, or is removed, the SFP+ module in Slot 2 turns on. The SFP module in Slot 1 does not work as long as an SFP+ module is in Slot 2, whether it has link up or not.
Will
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