Network traffic from a Mellanox NIC appears to be leaving the system but never makes it to the wire
Issue
- Packets leaving the transmission queue (TX) in route to port 2049 on Red Hat Enterprise Linux 6 appear to never actually leave the NIC and make it to the wire.
- One particular service (eg: NFS, SSH, DNS, or NTP) fails or stops responding but other network traffic works fine, and restarting the service makes it start working again.
- Having intermittent network issues on servers running RHEL with a Mellanox network card or mlx4 driver
Environment
- Red Hat Enterprise Linux 5.10 or earlier
- Red Hat Enterprise Linux 6.5 or earlier
- Red Hat Enterprise MRG 2.5 or earlier
- Mellanox Technologies ethernet controller using
mlx4_endriver
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