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Unable to mount previously-working NFS share from NIM to LPAR

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Operating Systems AIX Unable to mount previously-working NFS share from NIM to LPAR
# 8  
Perhaps I've missed something but I'm not sure how relevant that post is. They show use of mountd, then discuss use of TCP and UDP, and the post doesn't get resolved...have I missed something in that thread?
# 9  
No, you didn't miss anything in that thread but it did say that different NFS versions use different protocols. The moderator that said that, Bakunin, is very knowledgeable on AIX.

He might chip in when he sees your thread.
# 10  
Ah OK, that's fine I was already aware of that. I'm using NFSv3. TCP and UDP ports are available, and I can get from LPAR1 to NIM using the TCP port:

[root@NIMsvr /]$ rpcinfo -p | grep mountd
    100005    1   tcp  57906  mountd
    100005    2   tcp  57906  mountd
    100005    3   tcp  57906  mountd
    100005    1   udp  38084  mountd
    100005    2   udp  38084  mountd
    100005    3   udp  38084  mountd

[root@LPAR1 ~]$ telnet nimsvr 57906
Connected to NIMsvr.
Escape character is '^]'.

# 11  

Check RPC is running on both servers.

rpcinfo -p <remote server>
# 12  
It is indeed running. I have recently restarted the NIM server, and it took a while to come up. It was stalling at starting up the rpc.mountd daemon. Then it finished OK:

0513-059 The nfsd Subsystem has been started. Subsystem PID is 5177506.
05/23 09:10:51 tftpd: [00000001] EZZ7001I Starting.
0513-059 The rpc.mountd Subsystem has been started. Subsystem PID is 3080418.
0513-059 The rpc.statd Subsystem has been started. Subsystem PID is 4325578.
0513-059 The rpc.lockd Subsystem has been started. Subsystem PID is 3277042.
Completed NFS services.

See output of the rpcinfo command below:

UKDCMMORA-1:>rpcinfo -p NIMsvr
   program vers proto   port  service
    100000    4   udp    111  portmapper
    100000    3   udp    111  portmapper
    100000    2   udp    111  portmapper
    100000    4   tcp    111  portmapper
    100000    3   tcp    111  portmapper
    100000    2   tcp    111  portmapper
    100003    2   udp   2049  nfs
    100003    3   udp   2049  nfs
    100003    2   tcp   2049  nfs
    100003    3   tcp   2049  nfs
    100003    4   tcp   2049  nfs
    200006    1   udp   2049
    200006    4   udp   2049
    200006    1   tcp   2049
    200006    4   tcp   2049
    100005    1   tcp  32768  mountd
    100005    2   tcp  32768  mountd
    100005    3   tcp  32768  mountd
    100005    1   udp  32805  mountd
    100005    2   udp  32805  mountd
    100005    3   udp  32805  mountd
    400005    1   udp  32806
    100021    1   udp  32971  nlockmgr
    100021    2   udp  32971  nlockmgr
    100021    3   udp  32971  nlockmgr
    100021    4   udp  32971  nlockmgr
    100021    1   tcp  32770  nlockmgr
    100021    2   tcp  32770  nlockmgr
    100021    3   tcp  32770  nlockmgr
    100021    4   tcp  32770  nlockmgr
    100024    1   tcp  32774  status
    100024    1   udp  33021  status
    100133    1   tcp  32774
    100133    1   udp  33021
    200001    1   tcp  32774
    200001    1   udp  33021
    200001    2   tcp  32774
    200001    2   udp  33021

# 13  
Hi, I seen something like this with systems with an external and internal network. Make sure your routing is setup correctly from the LPARs. I know, pretty generic to say.

Also any firewall between your systems? Also another reason for timeouts.
If there is a firewall consider updating /etc/services with new mountd entries then refresh the rpc.mountd service. By default, I think mountd can use anything between 32768 to 65535. So by forcing it to a port you can reduce the set of rules that need to be modified.

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