ok...I'm totally lost... :) $ ethtool -k em1 Features for em1: rx-checksumming: on tx-checksumming: on tx-checksum-ipv4: on tx-checksum-ip-generic: off [fixed] tx-checksum-ipv6: on tx-checksum-fcoe-crc: on [fixed] tx-checksum-sctp: on scatter-gather: on tx-scatter-gather: on tx-scatter-gather-fraglist: off [fixed] tcp-segmentation-offload: on tx-tcp-segmentation: on tx-tcp-ecn-segmentation: off [fixed] tx-tcp6-segmentation: on udp-fragmentation-offload: off [fixed] generic-segmentation-offload: on generic-receive-offload: on large-receive-offload: on rx-vlan-offload: on tx-vlan-offload: on ntuple-filters: off receive-hashing: on highdma: on [fixed] rx-vlan-filter: on vlan-challenged: off [fixed] tx-lockless: off [fixed] netns-local: off [fixed] tx-gso-robust: off [fixed] tx-fcoe-segmentation: on [fixed] tx-gre-segmentation: off [fixed] tx-ipip-segmentation: off [fixed] tx-sit-segmentation: off [fixed] tx-udp_tnl-segmentation: off [fixed] tx-mpls-segmentation: off [fixed] fcoe-mtu: off [fixed] tx-nocache-copy: on loopback: off [fixed] rx-fcs: off [fixed] rx-all: off tx-vlan-stag-hw-insert: off [fixed] rx-vlan-stag-hw-parse: off [fixed] rx-vlan-stag-filter: off [fixed] l2-fwd-offload: off
Daofeng On Tue, Jun 16, 2015 at 12:55 PM, Daofeng Li <lid...@gmail.com> wrote: > Thanks Adi, I'll try. > > best, > > > Daofeng > > On Tue, Jun 16, 2015 at 12:01 PM, Adi Kriegisch <a...@cg.tuwien.ac.at> > wrote: > >> Hey! >> >> > Honestly..I don't know what those dropped packets, it;s just a new >> > installed system. >> I see... depending on what services are running on that network, this >> might >> be some avahi messages or similar stuff; in case this is a storage-only >> network and there is no other stuff floating around, this may well be the >> cause for the issues... >> >> > Do you mean my MTU 9000 is too high? >> No, I don't think so. Maybe some of the ethernet offloading stuff in the >> NIC is unable to handle larger packets? You may check with 'ethtool -k >> em1' >> what is enabled and may try to selectively disable and retest... >> >> -- Adi >> > >
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