topic Re: Error: Cannot add Switched UNI ports/Fabric Attach enabled ports to MLT in ExtremeSwitching (VSP/Fabric Engine)

Error: Cannot add Switched UNI ports/Fabric Attach enabled ports to MLT

Anonymous — Sat, 14 Aug 2021 21:07:55 GMT

Hi,

Just in the process of trying to enable switched UNI on a port that goes from VOSS to an Extreme B5, so enabled LACP so make sure the LAG / MLT forms correctly. Believe that is best / or good practise as opposed to static LAG/MLT if connecting to EXOS or VOSS i.e. dynamic if other switch manufacturer?

mlt 310 enable
mlt 310 name "NewHQ-SK1"

interface mlt 310
lacp key 310
lacp enable
flex-uni enable
smlt
exit

interface gigabitEthernet 3/10
flex-uni enable
name "NewHQ-SK1"
slpp packet-rx 
slpp packet-rx-threshold 50
no spanning-tree mstp
lacp key 310
lacp aggregation enable
lacp mode active
lacp enable

The error below comes up at the point of entering ‘lacp enable’

Error: Cannot add Switched UNI ports/Fabric Attach enabled ports to MLT

Looking at the EVD, with the exception of LACP, the configuration seems to be valid and you can add Switch UNI ports to an MLT

Looking at this post it seems LACP is supported on flex-uni ports:

Maybe something obvious?

Many thanks in advance

Re: Error: Cannot add Switched UNI ports/Fabric Attach enabled ports to MLT

Miguel-Angel_RO — Sat, 14 Aug 2021 21:36:53 GMT

Martin,

In my opinion you only add the command “flex-uni” to the interface where you want to activate it.

In your case, it is the MLT and not the specific gigabit interface.

If you read the comment from the EVD, it says “Enable Flex-Uni on MLT … and other interfaces...”.

In the EVD, the interfaces 1/13 and 1/20 are not part of any MLT and require specific activation of “flex-uni”. Here what is just before your screenshot:

Just remove the statement “flex-uni enable” from your gigabit interfaces 3/10.

Let me know if it was indeed obvious

Mig

Re: Error: Cannot add Switched UNI ports/Fabric Attach enabled ports to MLT

Anonymous — Sat, 14 Aug 2021 21:41:36 GMT

Hi Mig,

Thanks for posting back so quickly.

Well, I’ll put it down to you being a genius 🙂

That indeed seems to have done the job, thanks for the support.

Cheers,

Martin