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nfsマウントでクライアントを増やした時に「mount.nfs: requested NFS version or transport protocol is not supported」

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##サーバー側の設定追加

# vi /etc/sysconfig/iptables
-A INPUT -p tcp --sport 2049 -s 172.168.1.1 -j  ACCEPT
-A OUTPUT -p tcp --sport 2049 -d 172.168.1.1 -j ACCEPT
#この行の後に同じように2行該当IPアドレスを指定して入力して追加

-A INPUT -p tcp --sport 2049 -s 172.168.1.2 -j  ACCEPT
-A OUTPUT -p tcp --sport 2049 -d 172.168.1.2 -j ACCEPT

反映

# service iptables restart
# vi /etc/exports
※他行と同様にIPを変えた行を最後に追加
/data1  172.168.1.2(rw,wdelay,no_root_squash,no_subtree_check,anonuid=65534,anongid=65534)

反映

# /usr/sbin/exportfs -r

##クライアント側の設定

# yum install nfs-utils
# mkdir /data1
# service rpcbind start
# mount -t nfs -o nfsvers=3  172.168.1.225:/data1 /data1

エラー!
mount.nfs: requested NFS version or transport protocol is not supported

##解決
なんてことはなく

# service nfs restart

で、解消。。
既存のクライアントへの影響が若干心配であるが、直後に確認した限りではマウントが外れるようなことはなかった。

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