Re: infiniscale iv switch howto set mtu_cap ?

I would use the ibportstate command for each required port:

ibportstate <switch lid> <switch port> mtu <mtu enum>

examples:

1K mtu:

ibportstate 1 13 mtu 3

2K mtu:

ibportstate 1 13 mtu 4

4K mtu:

ibportstate 1 13 mtu 5

for an entire switch (with lid ==1):

for port in {1..36} ; do ibportstate 1 $port mtu 4 ; done

you can verify with:

smpquery pi <switch lid> <switch port> | grep NeighborMTU