[c-nsp] C3550-12T - Gig copper ports won't link at 1Gb

[graham]

Hi Keegan,

It will only link with this type of config:

CR1-ORL1#show running-config interface gigabitEthernet 0/1
Building configuration...

Current configuration : 145 bytes
!
interface GigabitEthernet0/1
 switchport access vlan 10
 switchport mode access
 speed auto 100 1000
 duplex full
 spanning-tree portfast


I have tried "speed auto" or "speed 1000" and it won't link. With the speed
subcommands, I have changed the duplex (like duplex auto) as well with no
prevail.

Other end has been two different HP Proliant Servers and a Mikrotik RB1100AH
router. The servers were set to auto, and the MT I played around with the
speed/duplex hardset and auto. I have tested these against a 3560G and can
link up @ 1Gb no problem. One of the server is on gi0/2 right now, set to
auto and it's doing 100/full (auto).

I will go back to the physical layer tomorrow and try new cabling (as I am
accessing the switch remotely right now).  I will try another port as well.

Thanks for the hints,

-graham


On 4/15/12 7:09 PM, "Keegan Holley" <keegan.holley at sungard.com> wrote:

> I have a bunch of these in the lab and haven't had a problem.  Have you tried
> enabling auto-negotiation?  Have you tried changing port?  Also, what is the
> other side set for?  What does it say?  The problem sounds kind of vague
> without an interface config or the exact device or nic you are trying to
> connect.
> 
> 2012/4/15 graham <graham at g-rock.net>
>> Hi there,
>> 
>> Anyone out there still using this older switch?  I just pulled one out of
>> the closet - and having a heck of a time getting the switchports to actually
>> link up at 1Gb.  I have a couple of 1Gb capable devices (servers, other
>> routers, etc) that do 1Gb all day long on other Cisco switches - but not on
>> the 3550-12T.  Remember, this is the switch that has (10) 10/100/1000 BaseTX
>> and (2) 1000 Gbic slots ..
>> 
>> I have tried to put the copper interface into "speed auto 1000" as well as
>> "speed 1000" (with the other side matching) and always results in a
>> not-connect. The command 'speed nonegotiate' doesn't exist.
>> 
>> Seems that 100-Full is the best I can get it.
>> 
>> It's running the last IOS for it, c3550-ipservicesk9-mz.122-44.SE6.bin.
>> 
>> Any guidance would be appreciated.  Thanks!
>> 
>> -graham
>> 
>> 
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> 
>