what happens when you 'ping -M do -s 65000 -c 4 <other IBoIP system> ?
Best Regards,
Strahil Nikolov
В понеделник, 14 декември 2020 г., 15:46:50 Гринуич+2, Patrick Bégou <patrick.begou@xxxxxxxxxxxxxxxxxxxx> написа:
Hi,
I'm deploying a CentOS8 (not stream 😁) cluster and I have a question
about MTU on the interfaces. I have a connectX6 Mellanox interface where
I need IBoIP setup.
I've setup this interface via nmcli and set the MTU to 65520 with:
nmcli connection modify ib0 mtu 65520
nmcli connection up ib0
Running "nmcli connection show ib0" report:
infiniband.mtu: 65520
But "ip addr show ib0" report a mtu of 2044:
6: ib0: <BROADCAST,MULTICAST,UP,LOWER_UP> *mtu 2044 *qdisc mq state
UP group default qlen 256
Why ? Who is wrong (possibly me....)?
Thanks
Patrick
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