ms210 stacking problem

[Acleri]

we bought 2xms210 with 2x 40gb stacking cable and follow the guide to configure a physical stack

https://documentation.meraki.com/MS/Stacking/Switch_Stacks

both switches have been connected to meraki cloud with one uplink each and the latest firmware MS 14.32 has been installed.

after powering down we connect both cable as explained (crossed) with only one uplink on one member.

unfortunately after the boot the stack interfaces are still down and there no potential stacking detected to create the stack, we try to create it manually but did not work.

we had to connect again the uplink on the other member and remove the stack configuration.

any suggestions?

thanks

[ww]

Would try to reseat the stack cables(make sure they pushed  in all the way) or try another stack cable.

[Acleri]

we have only 2x stack cable and we reseat them several times but nothing change

[cmr]

Do the stacking ports come up green?

What I do is:

• Configure stack in dashboard
• Connect one switch to internet
• Wait until firmware upgrades and switch settles (give 30 minute)
• Connect stacking cables and one front port between switches 1 and 2
• Power up switch 2
• Wait until firmware upgrades, stack forms, STP disables front panel link
• Repeat until all stack members are up.

I know it isn't the prescribed order but it always seems to work for me...

[Acleri]

Do the stacking ports come up green?

no

What I do is:

• Configure stack in dashboard (both switched should be powered off?)
• Connect one switch to internet 
• Wait until firmware upgrades and switch settles (give 30 minute)
• Connect stacking cables and one front port between switches 1 and 2 (with one switch powered and the other powered off?)
• Power up switch 2
• Wait until firmware upgrades, stack forms, STP disables front panel link
• Repeat until all stack members are up.

[cmr]

Are the cables clicking in?  I've never had them not go green on the dashboard...

[Acleri]

yes they're connected firmly. 

[cmr]

Do you have any other QSFP+ DAC cables, or any other devices that have a QSFP+ socket so you could test to see if you have faulty cables or (less likely) faulty sockets.  Have you tried connecting the cables from one port to the other on the same switch to see if you get anything on the dashboard?  I'm presuming you just have a black rectangle as below:

You should see the connector type and green like this:

 

[Acleri]

we have 2 cables connected crossed but all the 4 ports are disconnected.

cables are cisco original (MA-CBL-40G-1M)

unfortunately we do not have other other QSFP+ DAC cables or socket.

we'll try to connect the cables one by one and see if it change.

[Acleri]

SOLVED: we were able to get 2x new stack cable and the links went up correctly

thanks to cmr and ww

[redsector]

Once I had the same problems with stacking cables.