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Statistics on ethernet adapter, crc error count must be 0
[root@tsm01 ~]# ethtool -S ens1f0 NIC statistics: rx_packets: 242322916 tx_packets: 263012523 rx_bytes: 351060937283 tx_bytes: 377174314358 rx_pkts_nic: 242322916 tx_pkts_nic: 263012523 rx_bytes_nic: 352030228947 tx_bytes_nic: 378238836900 lsc_int: 3 tx_busy: 0 non_eop_descs: 0 rx_errors: 0 tx_errors: 0 rx_dropped: 0 tx_dropped: 0 multicast: 36186 broadcast: 239320 rx_no_buffer_count: 0 collisions: 0 rx_over_errors: 0 rx_crc_errors: 0 rx_frame_errors: 0
[root@lnx01 ~]# yum install nfs-utils [root@lnx01 ~]# firewall-cmd --zone=public --add-service=nfs --permanent [root@lnx01 ~]# systemctl reload firewalld [root@lnx01 ~]# cat /etc/exports /data 190.168.1.0/24(rw,no_subtree_check,no_root_squash) [root@lnx01 ~]# systemctl start rpcbind nfs-server [root@lnx01 ~]# systemctl enable rpcbind nfs-server
When the NFS service starts, he do a exportfs command which validate the content of /etc/exports, and put it into /var/lib/nfs/etab
# cat /var/lib/nfs/etab /data 190.168.1.0/24(rw,sync,wdelay,hide,nocrossmnt,secure,no_root_squash,no_all_squash,no_subtree_check,secure_locks,acl,no_pnfs,anonuid=65534,anongid=65534,sec=sys,secure,no_root_squash,no_all_squash)
[root@lnx01 ~]# yum install nfs-utils [root@lnx02 ~]# systemctl start rpcbind [root@lnx02 ~]# systemctl enable rpcbind [root@lnx02 ~]# mount -t nfs -o vers=4 lnx01:/data /mnt [root@lnx02 ~]# cat /etc/fstab ..... lnx01:/data /mnt nfs vers=4,proto=tcp,soft 0 0
Note
For NFSv3 you need additionnal steps
https://computingforgeeks.com/configure-nfsv3-and-nfsv4-on-centos-7/