IMS Switch 10G.XC interlink causes loop

[idata]

Hi there,

i got a MFSYS25V2 with 2 Switches.

Since upgrade to firmware version 11.5 i have the following problem.

On both switches i configured a VLAN with e.g. VLAN-ID 55 on only one single external port as untagged, not on the 10G.XC interlink port.

I also have two Dell PowerConnect switches.

When i connect these components as show in the graphic below, i get a loop.

Note:

- The 10G.XC interlink is not member of the VLAN-ID 55.

- all Servers are shut down

- jumbo frames on all switches are enabled (also tried with disabled)

Is there a known bug in the new firmware version 11.5?

[Daniel_O_Intel]

For all versions of firmware, not just 11.5, it is recommended to keep that link disabled.

[idata]

Thank you for answering.

I'm using this 10G.XC link for several VLANs.

Only a single one should be used like described in my question.

So my question is answer but the problem still exists.

[Daniel_O_Intel]

You can disable that link, regardless of VLAN assignment.