Corosync warning [KNET ] pmtud: possible MTU misconfiguration detected. kernel is reporting MTU: 1500 bytes for host 1 link 0 but the other node is not acknowledging packets of this size.

Issue

• Both links were not working correctly?

  Jun 12 22:46:37.556 [2418] node1 corosync info    [KNET  ] pmtud: Invalid MTU detected for host: 1 link: 1 mtu: 133
  Jun 12 22:46:37 node1 corosync[2418]:  [KNET  ] pmtud: Invalid MTU detected for host: 1 link: 1 mtu: 133
  Jun 12 23:02:37.813 [2418] node1 corosync warning [KNET  ] pmtud: possible MTU misconfiguration detected. kernel is reporting MTU: 1500 bytes for host 1 link 0 but the other node is not acknowledging packets of this size.
  

  Jun 17 04:57:18.639 [2445] node1 corosync warning [KNET  ] pmtud: possible MTU misconfiguration detected. kernel is reporting MTU: 1500 bytes for host 1 link 0 but the other node is not acknowledging packets of this size.
  Jun 17 04:57:18.639 [2445] node1 corosync warning [KNET  ] pmtud: This can be caused by this node interface MTU too big or a network device that does not support or has been misconfigured to manage MTU of this size, or packet loss. knet will continue to run but performances might be affected.
  Jun 17 04:57:18.641 [2445] node1 corosync info    [KNET  ] pmtud: PMTUD link change for host: 1 link: 0 from 1397 to 1381
  Jun 17 04:57:18.641 [2445] node1 corosync info    [KNET  ] pmtud: Global data MTU changed to: 1381
  

• How to disable auto-detected knet_mtu?

• Is there any way to set this without stopping resources and just reload conf?