Cannot set int g1/0/1 into speed 100,duplex full

[alioune-ndiaye]

Hello guys,

I need help for my 3750G-12S-S.

Problem description:

I had a WS-3750G-12S-S in production with a defective fan tray and needed to change it.

I faced to trouble with inter g1/0/1 on the new switch( it worked fine on the old).

Here the config for old switch:

interfacigabitEthernet1/0/1

  switchport trunk encapsulation dot1q

switchport trunk allowed vlan 111-113,278,790

switchpmode trunk

speed 100

duplex full

  no cdp enable

!

#show int g1/0/1

GigabitEthernet1/0/1 is up, line protocol is up (connected)

  Hardware is Gigabit Ethernet, address is 0022.5599.8501 (bia 0022.5599.8501)

  Description: VMAN-ORANGE

  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive not set

  Full-duplex, 100Mb/s, link type is auto, media type is 10/100/1000BaseTX SFP

  .....

For the new on:

interfacigabitEthernet1/0/1

  switchport trunk encapsulation dot1q

switchport trunk allowed vlan 111-113,278,790

switchpmode trunk

no cdp enable

!

#sh int g 1/0/1

GigabitEthernet1/0/1 is down, line protocol is down (notconnect)

  Hardware is Gigabit Ethernet, address is ec44.766e.7201 (bia ec4466e.7201)

  Description: VMAN-ORANGE

  MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive not set

  Auto-duplex, Auto-speed, link type is auto, media type is 10/100/1000BaseTX SFP

The main issue is  I can't config speed 100

(config-if)#speed ?

  nonegotiate  Do not negotiate speed

even if I configure  speed nonegotiate that does not work.

Thanks

Alioune

[cadet alain · Accepted solution]

Hi,

GigabitEthernet1/0/1 is down, line protocol is down (notconnect)

Is it connected to another device ? did you try another cable?

Regards.

Alain.

[Peter Paluch · Accepted solution]

Alioune,

Are you using precisely the same C3750 type, precisely the same IOS version and precisely the same SFP module? Is it possible that the current module is fixed-speed, 1Gbps only?

Best regards,

Peter

[alioune-ndiaye]

Thank you guys,

Peter

Indeed , i use the same ios:

"c3750-ipservicesk9-mz.122-35.SE5.bin"

The only difference i see is: the switch model

In production:WS-C3750G-12S-E

New switch:WS-C3750G-12S-S, and  I can't  configure speed 100 and duplex full..

I think its mainly a physical issuue because layer 1 does not work.

Thank you

Alioune

[Somasundaram Jayaraman]

Hi,

could you please share the output of "show int gig 1/0/1 capabilities". This output will show what the interface is capable of.

The below link might interest you.

http://www.cisco.com/en/US/tech/tk389/tk214/technologies_tech_note09186a0080094781.shtml

Hope this helps

Cheers

Somu

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[alioune-ndiaye]

Alain,

The same cable works find with the first switch with

interfacigabitEthernet1/0/1

  switchport trunk encapsulation dot1q

switchport trunk allowed vlan 111-113,278,790

switchpmode trunk

speed 100

duplex full

  no cdp enable

But I cannot configure speed 100 and duplex full on the new switch.

thanks

Alioune

[Peter Paluch]

Hi Alioune,

Somu gave a very good hint - try using the show interface gi1/0/1 capabilities and post the results here.

Best regards,

Peter

[manju.cisco]

Hi Alioune,

Just to try,

Did you try connecting and configuring to any other gig ports like gi1/0/2 - 12 and see if you are able to configure the speed to 100 ???

Also, can you please give us output of command "show post" ., (this command i just learnt today in other thread ).

Thanks

Manju

[alioune-ndiaye]

Thank you guys , Peter , Manju,

I will update on tuesday becacuse i don't have remote access.

Enjoy your weekend.

Thanks

Alioune

[Leo Laohoo]

I need help for my 3750G-12S-S.

3750G-12S???  You CANNOT set the speed and duplex setting because these are SFP-based.

For example, if you have using Cisco GLC-GE-100FX then the port will automatically allow speed 100, duplex full and you can't set anything else.

If you are using Cisco GLC-SX-MM then the port will automatically be set by the switch to speed 1000, duplex full.

In your opening thread, you want to set your port to 100 mbps on a Cisco WS-C3750G-12S, then you must have a   GLC-GE-100FX.

[alioune-ndiaye]

Hello Leohaohoo,

Thank you for answering, I highly appreciated it.

What about  a WS-C3750G-12S-E switch?

The one I had in production its int g1/0/1 was configured speed 100 and duplex full with gbic module 10/100/1000 Base TX SFP.

Regards

Alioune

[Leo Laohoo]

What about  a WS-C3750G-12S-E switch?

It doesn't make a difference.  The speed setting of the port is determined by the type of SFP module you insert/install into the WS-C3750G-12S-S/WS-C3750G-12S-E.

If you are using, for example, GLC-SX-MM then the speed will be 1000 mbps and nothing less.  If you are using GLC-GE-100FX then the speed will be 100 mbps and nothing more, nothing less.  Duplex setting will always be FULL duplex.

The only module, as far as I remembered, where you can set the speed to 100 or 1000 mbps is the GLC-T (if NOT installed in a 6500).

Hope this clarifies things for you.

[alioune-ndiaye]

Hello Leohaohoo,

Thank  u for clarifying, what I do not understand is I used the same SFP that was  configured with speed 100.

But when I moved the same cable with SFP to the new switch Iwas/ am not able to configure speed 100 on the new switch.I do not know how that person managed to do the configuration.

Thanks

Alioune

[Leo Laohoo]

Thank  u for clarifying, what I do not understand is I used the same SFP that was  configured with speed 100.

What is the type of SFP are we talking about?  Can you post the output for "sh inventory"?

But when I moved the same cable with SFP to the new switch Iwas/ am not able to configure speed 100 on the new switch.

You moved the SFP from your existing switch stack to another switch or switch stack?  Can you post the command output of both switch/switch stack:  sh version?

[CSCO11224048]

Hello alioune-ndiaye,

Is your case solved because i faced the same problem with same switch with same SFP.