09-02-2013 01:52 PM - edited 03-01-2019 04:57 PM
It is sometimes confusing on which interfaces are available and which can be configured when using one of the NM modules in a Cisco 3850 Switch. We currently offer three different modules:
The available configuration is based on which model NM you are using. The intent of this document is to help clear up some of the misunderstood configuration options. Below are details on each NM module and how to configure each one when inserted into the switch.
This module has four 1-Gigabit SFP module slots. Any combination of standard SFP modules are supported. SFP+ modules are not supported. If you insert an SFP+ module in the 1-Gigabit network module, the SFP+ module does not operate, and the switch logs an error message.
This module has four slots that support the following combinations:
•Two slots (left side) support only 1-Gigabit SFP modules and two slots (right side) support either 1-Gigabit SFP or 10-Gigabit SFP modules.
•Three slots (left side) support 1-Gigabit SFP modules and one slot (right side) supports 10-Gigabit Ethernet SFP+.
Supported combinations of SFP and SFP+ modules:
•Slots 1, 2, 3, and 4 populated with 1-Gigabit SFP modules.
•Slots 1 and 2 populated with 1-Gigabit SFP modules, and Slot 4 populated with one 10-Gigabit SFP+ module.
•Slot 3 and Slot 4 each populated with 10-Gigabit SFP+ modules.
This module has four 10-Gigabit slots or four 1-Gigabit slots.
Note This is only supported on the 48-port models.
For the C3850-NM-4-1G module - All ports are natively Gig and are configured as Gig1/1/1 through Gig1/1/4
<snippet>
interface GigabitEthernet1/1/1 <-------- Config this interface
!
interface GigabitEthernet1/1/2 <-------- Config this interface
!
interface GigabitEthernet1/1/3 <-------- Config this interface
!
interface GigabitEthernet1/1/4 <-------- Config this interface
!
interface TenGigabitEthernet1/1/1 <-------- Disregard
!
interface TenGigabitEthernet1/1/2 <-------- Disregard
!
interface TenGigabitEthernet1/1/3 <-------- Disregard
!
interface TenGigabitEthernet1/1/4 <-------- Disregard
For the C3850-NM-4-10G module - All ports default to 10G and should be configured as
TenGig1/1/1 through TenGig1/1/4 - even though you are operating them as 1G via SFPs.
<snippet>
interface GigabitEthernet1/1/1 <-------- Disregard
!
interface GigabitEthernet1/1/2 <-------- Disregard
!
interface GigabitEthernet1/1/3 <-------- Disregard
!
interface GigabitEthernet1/1/4 <-------- Disregard
!
interface TenGigabitEthernet1/1/1 <-------- Config this interface
!
interface TenGigabitEthernet1/1/2 <-------- Config this interface
!
interface TenGigabitEthernet1/1/3 <-------- Config this interface
!
interface TenGigabitEthernet1/1/4 <-------- Config this interface
For the C3850-NM-2-10G module - The first two ports are natively 1G ports and the last two ports
are natively 10G ports. So you configure the 1Gig ports as Gig1/1/1 through Gig1/1/2, and configure the
last two ports as TenGig1/1/3 through TenGig1/1/4 - even if you are operating the last two ports as 1G.
## This is commonly misunderstood ##
<snippet>
interface GigabitEthernet1/1/1 <-------- Config this interface
!
interface GigabitEthernet1/1/2 <-------- Config this interface
!
interface GigabitEthernet1/1/3 <-------- Disregard
!
interface GigabitEthernet1/1/4 <-------- Disregard
!
interface TenGigabitEthernet1/1/1 <-------- Disregard
!
interface TenGigabitEthernet1/1/2 <-------- Disregard
!
interface TenGigabitEthernet1/1/3 <-------- Config this interface even if using 1G
!
interface TenGigabitEthernet1/1/4 <-------- Config this interface even if using 1G
** There are only 4 interfaces which are valid and the other 4 should not be used even though they still show up in the CLI
Great doc!!
the network module for the 3850's: are these hot swappable? i want to remove it during production and then maybe one day add it back on during production. I don't want to reload the switch; is this possible?
Better to pose a question as a new thread but - yes - they are hot-swappable.
Thanks Marv!
thank you
i though that all new interface were going to drop the speed in the name
ie all will be Eth /1/2/3
this started in some product to make interface consistant.and also align with Juniper methodology
cherrs
Hi all,
I'm a little confused about the C3850-NM-2-10G.
under the supported combinations I see the following:
1G - 1G -1G -1G
1G - 1G - empty - 10G
empty - empty - 10G - 10G
I'm missing the following option: 1G - 1G -10G -10G
Does this mean it is not supported?
Can i install the 1G module in 10 slot.
Can i connect my 3750 e 1g sfp port with the 3850 10 SFP port
To clarify
Cisco is moving to a new naming schema
OLD: eth 0/1 , Fe 0/1, GI, 0/1 and TenGigabitEthernet1/1/1
NEW: eth 0/1 for all interfaces regardless of speed
some products limit mix and matching
Hi, I am a bit confused here. Regarding the part where it is written
I have exactly the same question as bramvdbosch
By looking at the install guide it looks like it is possible to have 1G - 1G -10G -10G, unless we are missing something?
The first two ports are natively 1-G ports and the last two ports are natively 10-G ports. So, you configure the 1-G posts as GigabitEthernet1/1/1 through GigabitEthernet1/1/2, and configure the last two ports as TenGigabitEthernet1/1/3 through TenGigabitEthernet1/1/4, even when you are operating the last two ports as 1-G. Only four interfaces are valid, and the other four should not be used even though they still show up in the CLI.
Interface | Action |
---|---|
GigabitEthernet1/1/1 | Configure this interface |
GigabitEthernet1/1/2 | Configure this interface |
GigabitEthernet1/1/3 | Disregard |
GigabitEthernet1/1/4 | Disregard |
TenGigabitEthernet1/1/1 | Disregard |
TenGigabitEthernet1/1/2 | Disregard |
TenGigabitEthernet1/1/3 | Configure this interface, even when operating as 1-G |
TenGigabitEthernet1/1/4 | Configure this interface, even when operating as 1-G |
got the same question here! did anyone tried this combo? 1g+1g+10g+10g? Even 1g+empty+10g+10g will be enough for me
ok, guys! Lets hope this helps.
I have a C3850-NM-2-10G module in the switch.
Switch#sh inv
NAME: "c38xx Stack", DESCR: "c38xx Stack"
PID: WS-C3850-24U , VID: V03 , SN: FCW1929C1UQ
NAME: "Switch 1", DESCR: "WS-C3850-24U-S"
PID: WS-C3850-24U-S , VID: V03 , SN: FCW1929C1UQ
NAME: "Switch 1 - Power Supply B", DESCR: "Switch 1 - Power Supply B"
PID: PWR-C1-1100WAC , VID: V01 , SN: DTN1921V49T
NAME: "Switch 1 FRU Uplink Module 1", DESCR: "2x1G 2x10G Uplink Module"
PID: C3850-NM-2-10G , VID: V01 , SN: FOC19261BXS
NAME: "Gi1/1/1", DESCR: "1000BaseSX SFP"
PID: , VID: , SN: FNS13020R6X
NAME: "Gi1/1/2", DESCR: "1000BaseSX SFP"
PID: , VID: , SN: FNS134301H0
NAME: "Te1/1/3", DESCR: "1000BaseSX SFP"
PID: GLC-SX-MMD , VID: V01 , SN: FNS1753026X
NAME: "Te1/1/4", DESCR: "1000BaseSX SFP"
PID: , VID: , SN: FNS13020R6P
Case-1)When there is no transceiver in the module:
It shows them as
GigabitEthernet1/1/1 unassigned YES unset down down
GigabitEthernet1/1/2 unassigned YES unset down down
GigabitEthernet1/1/3 unassigned YES unset down down
GigabitEthernet1/1/4 unassigned YES unset down down
Te1/1/1 unassigned YES unset down down
Te1/1/2 unassigned YES unset down down
Te1/1/3 unassigned YES unset down down
Te1/1/4 unassigned YES unset down down
Case-2: When I inserted two 1-gig SFPs on the two left and two 10-gig on the two right ports:
Gi1/1/1 notconnect 1 full 1000 1000BaseSX SFP
Gi1/1/2 notconnect 1 full 1000 1000BaseSX SFP
Te1/1/3 notconnect 1 full 10G SFP-10GBase-SR
Te1/1/4 notconnect 1 full 10G SFP-10GBase-SR
Notice: Gig 1/1/3 and Gi1/1/4 have disappeared as well as Te1/1/1 and Te1/1/2.
Case-3: Now I replaced SFP-10GBase-SR in port-3 with a 1000BaseSX SFP. See what happened:
*Oct 22 10:48:54.528: %PLATFORM_PM-6-MODULE_REMOVED: SFP module with interface name Te1/1/3 removed
*Oct 22 10:48:59.634: %PLATFORM_PM-6-MODULE_ERRDISABLE: The inserted SFP module with interface name Te1/1/3 is not supported
*Oct 22 10:48:59.634: %PM-4-ERR_DISABLE: gbic-invalid error detected on Te1/1/3, putting Te1/1/3 in err-disable state
Then I tried resetting the port, just to see, will the 3rd port ever work for 1-gig.
Switch#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#int ten1/1/3
Switch(config-if)#shut
Switch(config-if)#no shut
Switch(config-if)#end
Switch#
*Oct 22 10:49:31.777: %SYS-5-CONFIG_I: Configured from console by console
*Oct 22 10:49:32.022: %PLATFORM_PM-6-MODULE_INSERTED: SFP module inserted with interface name Te1/1/3
Switch#
Switch#sh int status
Port Name Status Vlan Duplex Speed Type
Gi1/0/1 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/2 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/3 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/4 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/5 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/6 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/7 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/8 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/9 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/10 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/11 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/12 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/13 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/14 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/15 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/16 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/17 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/18 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/19 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/20 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/21 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/22 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/23 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/24 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/1/1 notconnect 1 full 1000 1000BaseSX SFP
Gi1/1/2 notconnect 1 full 1000 1000BaseSX SFP
Te1/1/3 notconnect 1 full 1000 1000BaseSX SFP
Te1/1/4 notconnect 1 full 10G SFP-10GBase-SR
Notice above that after shut/.no-shut on port Te1/1/3, it is ready for connection but the interface naming stayed to be Te1/1/3 and did not change to a Gi1/1/# format even though the transceiver in the port is a gig-SFP.
Case-4: Finally, I replaced the last 10-gig with a gig too and this time, port didn't even err-disabled.
*Oct 22 10:58:00.558: %PLATFORM_PM-6-MODULE_REMOVED: SFP module with interface name Te1/1/4 removed
*Oct 22 10:58:11.438: %PLATFORM_PM-6-MODULE_INSERTED: SFP module inserted with interface name Te1/1/4
Switch#
Switch#sh int status
Port Name Status Vlan Duplex Speed Type
Gi1/0/1 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/2 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/3 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/4 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/5 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/6 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/7 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/8 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/9 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/10 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/11 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/12 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/13 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/14 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/15 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/16 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/17 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/18 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/19 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/20 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/21 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/22 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/23 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/24 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/1/1 notconnect 1 full 1000 1000BaseSX SFP
Gi1/1/2 notconnect 1 full 1000 1000BaseSX SFP
Te1/1/3 notconnect 1 full 1000 1000BaseSX SFP
Te1/1/4 notconnect 1 full 1000 1000BaseSX SFP
Notice above, now we have ALL 1-gig SFPs but the port naming stayed the same. It makes sense. If the interface naming changes as soon as you replace a transceiver then your config gets nullified. Cisco did what made sense that once the switch boots up and intial config is deployed on the uplink module, then the interface naming doesnt change on changing the transceivers.
Hope this post has cleared all doubts. I was myself curious and wanted to find an online answer but upon seeing this confusion, decided to take time and help everyone like this community has helped me zillion times in the past.
Thanks everyone!
Thank you mi975q!
An ounce of data is worth several pounds of conjecture. :)
Hi Richard,
I need to know about "C3850-NM-4-10G".
The 4 slots will work either as 10G or 1G. By this I mean that it will be
Either 10G-10G-10G-10G
Or 1G-1G-1G-1G
I have a scenario where I need connection on all the ports.
Slot 1: GLC-T
Slot 2: GLC-T
Slot 3: SFP-10G-SR Or GLC-SX-MMD (1G or 10G will be decided in future but I need support for both SFP's)
Slot 4: SFP-10G-SR Or GLC-SX-MMD (1G or 10G will be decided in future but I need support for both SFP's
Can anyone please advise/help me ?
Regards,
Farhan.
on our 3750x i allows 4 x 1Gbs or two 10Gbs
on the outside only slots 2 and 4 show up as 10 Gbs slots
they are marked TE1 and Te2
slots 1 and 3 have no TE marking
thus 4x 1GBS or 2x 10Gbs
Just regarding the compatibility of the C3850-NM-4-10G module, I note from Richard's original article that only 48 port models support this network module....
"C3850-NM-4-10G
This module has four 10-Gigabit slots or four 1-Gigabit slots.
Note This is only supported on the 48-port models."
However, current Cisco documentation lists the C3850-NM-4-10G as compatible with the C3850-24XS (which I'm looking to purchase). Is this correct?
Alternatively, I'd like to use the C3850-NM-2-40G with the same switch (which I believe is compatible), but any one have a rough idea of price? I can't seem to find these modules anywhere!
Tony
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