Cannot Connect S6700 Trunk between Gigabyte port to 100Mb port of Cisco 2960

Latest reply: Dec 11, 2014 14:37:09 1950 4 0 0

Hi, 


In our LAB we have an S6700 switch connected to an Cisco 2950 switch using the Gigbit ports of the Cisco 2950 switch. Using the port-channel is working properly. 

We also tried to connect  an Cisco 2960 switch (100mB port) with an Gigbit port of the Huawei true an trunk, but this trunk is not comming up. We tried to change te port speed on the S6700, but this is not an option. 

So the ports speed on the S6700 is 1000mb and on the Cisco 2960 is 100mb. Somehow the auto negotiate is not working. 


The software version of the S6700 : V200R003C00SPC300

Does anyone knows if it is possible to connect an 100mb port to an 6700 1g port? 


Sjoerd Verhage. 

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Sentinel
Created Dec 3, 2014 15:55:59 Helpful(0) Helpful(0)

Hi,

 

You need tos disable auto-negotiation on the Huawei switch before you can change the speed.

Use the "undo negotiation auto" command.

You can then use the "speed" and "duplex" commands to set the speed you require.

 

Regards Nigel

 

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user_1911587
Created Dec 3, 2014 19:40:11 Helpful(0) Helpful(0)

Hi Nigel, 


Thanks for your quick response.

I had already tried to undo the negotiation, but unfortunately this gives no result.


Displaying the port gives: 

Speed : 1000,   Loopback: NONE
Duplex: FULL,   Negotiation: DISABLE
Mdi   : AUTO,   Flow-control: DISABLE


Setting the Speed (or duplex) gives: 

[TTLab_Core-XGigabitEthernet1/0/17]speed ?

                                                   ^
Error: Unrecognized command found at '^' position.
[TTLab_Core-XGigabitEthernet1/0/17]


Any suggestions? 


Regards, 


Sjoerd 




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Sentinel
Created Dec 5, 2014 11:55:51 Helpful(0) Helpful(0)

Hi Sjoerd,

 

I am not an expert on the specific hardware and I think it will probably depend on the type of SFP you have installed but I don't thinlk all the SFPs actually support speeds below 1G!

That certainly seems to be indicated by the responses you are getting from the device, the fact that it is not giving you the speed option suggests to me that it does not support reducing the speed below 1G.

 

Regards Nigel

 

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user_1911587
Created Dec 11, 2014 14:37:09 Helpful(0) Helpful(0)

Hi Nigel, 


Today was the first this week i am in the office. 

The SFP we are using are the: Finisar FCMJ-8521-3 Active Copper. 

Do you know if these SFP's support 100mb? 


Regards, 


Sjoerd 

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