Could not mount NetApp volume through NFS: rpcinfo: RPC: Timed out

I am trying to mount one of NFS volume exported from NetApp storage but getting below error. 10.242.12.24 is my NFS server. I am trying to mount on Suse 11.4 which is my NFS client. mount.nfs: trying text-based options 'hard,addr=10.242.12.24' mount.nfs: prog 100003, trying vers=3, prot=6 mount.nfs: trying 10.242.12.24 prog 100003 vers 3 prot TCP port 2049 mount.nfs: portmap query retrying: RPC: Timed out mount.nfs: prog 100003, trying vers=3, prot=17 mount.nfs: trying 10.242.12.24 prog 100003 vers 3 prot UDP port 2049 mount.nfs: portmap query failed: RPC: Timed out mount.nfs: mount to NFS server '10.242.12.24:/vol/v_fs0028' failed: timed out, giving up If run the below command, I get an error: iza0560:/tmp # rpcinfo -t 10.242.12.24 nfs rpcinfo: RPC: Timed out program 100003 version 0 is not available iza0560:/tmp # rpcinfo -u 10.242.12.24 nfs rpcinfo: RPC: Timed out program 100003 version 0 is not available iza0560:/tmp # iza0560:/tmp # rpcinfo -p 10.242.12.24 program vers proto port service 100011 1 udp 4049 rquotad 100024 1 tcp 4047 status 100024 1 udp 4047 status 100021 4 tcp 4045 nlockmgr 100021 3 tcp 4045 nlockmgr 100021 1 tcp 4045 nlockmgr 100021 4 udp 4045 nlockmgr 100021 3 udp 4045 nlockmgr 100021 1 udp 4045 nlockmgr 100005 3 tcp 4046 mountd 100003 3 tcp 2049 nfs 100005 2 tcp 4046 mountd 100005 1 tcp 4046 mountd 100003 2 tcp 2049 nfs 100005 3 udp 4046 mountd 100003 3 udp 2049 nfs 100005 2 udp 4046 mountd 100005 1 udp 4046 mountd 100003 2 udp 2049 nfs 100000 2 tcp 111 portmapper 100000 2 udp 111 portmapper Telnet over port 111, 2049 and others of NFS server are working.