Nfs Vlted 45 Work -

| Practice | Why It Helps | |----------|---------------| | | Most mature, fewer unsupported ops. | | Keep kernel & nfs-utils in sync on client/server | Error 45 often appears after partial updates. | | Test new mount options with -o noac,vers=4.2 first | Exposes unsupported features early. | | Use nfsstat regularly | nfsstat -c -v shows per-operation error counts. | | When upgrading servers, enable debugging | echo 32767 > /proc/sys/sunrpc/rpc_debug (temporary). | Conclusion: Your "NFS VLTED 45" Checklist The phrase "nfs vlted 45 work" may be awkward and misspelled, but it points to a real, solvable issue: NFSv4.1+ returning ENOTSUP (Error 45) for unsupported operations.

tcpdump -i eth0 -s 0 -w nfs-debug.pcap port 2049 # Reproduce the error, then Ctrl+C Analyze with Wireshark or tshark :

sudo systemctl restart nfs-server sudo exportfs -rav Also verify the server’s NFS version support: nfs vlted 45 work

# Check kernel messages dmesg | grep -i nfs | grep -i "45" mount | grep nfs Run a controlled test with verbose output mount -t nfs -o vers=4,verbose server:/export /mnt/test

cat /proc/fs/nfsd/versions # Output example: -2 +3 +4 +4.1 +4.2 # If +4.2 is missing, upgrade your kernel and nfs-utils. If you’re stuck on an older kernel, backported NFS fixes exist. For RHEL/CentOS 7: | Practice | Why It Helps | |----------|---------------|

uname -r If < 4.15, upgrade or disable pNFS with -o nopnfs . When the basic steps fail, get surgical. Use tcpdump to see the actual NFS call that returns error 45 .

# Before (too restrictive) /export *(rw,sync,no_subtree_check) /export *(rw,sync,fsid=0,crossmnt,no_subtree_check,sec=sys) | | Use nfsstat regularly | nfsstat -c

Then restart services (systemd example):