Failed to mount NFS in Linux. Error: mount. nfs: Connection timed out

Failed to mount NFS in Linux. Error: mount. nfs: Connection timed out

When ZTE distributed storage is mounted on the transcoding service platform today, the following error occurs:

Linux-82ke :~ # Mount-t nfs 192.168.202.60:/mnt/zxdfs/CM_South23/root/cccloud_tenant_id10001155/mnt/D989/60/mnt/wfs10-v
Mount. nfs: timeout set for Wed Jul 30 15:39:52 2014
Mount. nfs: trying text-based options 'vers = 4, addr = 192.168.202.60, clientaddr = 192.168.199.4'
Mount. nfs: mount (2): No such file or directory
Mount. nfs: trying text-based options 'addr = 192.168.202.60'
Mount. nfs: prog 100003, trying vers = 3, prot = 6
Mount. nfs: trying 192.168.202.60 prog 100003 vers 3 prot TCP port 2049
Mount. nfs: prog 100005, trying vers = 3, prot = 17
Mount. nfs: trying 192.168.202.60 prog 100005 vers 3 prot UDP port 39325
Mount. nfs: mount (2): Connection timed out
Mount. nfs: trying text-based options 'vers = 4, addr = 192.168.202.60, clientaddr = 192.168.199.4'
Mount. nfs: mount (2): No such file or directory
Mount. nfs: trying text-based options 'addr = 192.168.202.60'
Mount. nfs: prog 100003, trying vers = 3, prot = 6
Mount. nfs: trying 192.168.202.60 prog 100003 vers 3 prot TCP port 2049
Mount. nfs: prog 100005, trying vers = 3, prot = 17
Mount. nfs: trying 192.168.202.60 prog 100005 vers 3 prot UDP port 32954
Mount. nfs: mount (2): Connection timed out
Mount. nfs: trying text-based options 'vers = 4, addr = 192.168.202.60, clientaddr = 192.168.199.4'
Mount. nfs: mount (2): No such file or directory
Mount. nfs: trying text-based options 'addr = 192.168.202.60'
Mount. nfs: prog 100003, trying vers = 3, prot = 6
Mount. nfs: trying 192.168.202.60 prog 100003 vers 3 prot TCP port 2049
Mount. nfs: prog 100005, trying vers = 3, prot = 17
Mount. nfs: trying 192.168.202.60 prog 100005 vers 3 prot UDP port 37809
Mount. nfs: mount (2): Connection timed out
Mount. nfs: Connection timed out

The/etc/exports configuration for ZTE distributed storage is as follows:
/Data 192.168.199. * (rw, no_root_squash, sync, no_subtree_check)
 
However, if you change/etc/exports:
/Data/test 192.168.199.4 (rw, no_root_squash, sync, no_subtree_check)
 
Mounting is successful again.
After inadvertently using the following configuration, it was actually normal:
/Data 192.168.199.0/24 (rw, no_root_squash, sync, no_subtree_check)

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