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infiniband : "enabling connected mode will cause multicast packet drops"

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we're following http://pve.proxmox.com/wiki/Infiniband#Without_Bonding .

on a pair machines used in pve as nfs storage ,

after bring up the interface , we get - from dmesg:
Code:

[ 9685.078436] ib0: enabling connected mode will cause multicast packet drops

[ 9685.082542] ib0: mtu > 2044 will cause multicast packet drops.

[ 9685.083261] ADDRCONF(NETDEV_UP): ib0: link is not ready

Are the multicast messages something we should deal with before proceding ?

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