NFS Mounting issues with MX4300-24XF and GS752TPV2

[Clay35]

Hello,

I've been trying to troubleshoot an NFS mounting issue.  The center of my network is a pair of MX4300's and I have GS752TPV2's hanging off of those.  The NFS server is off a Redhat machine and the subnet restriction is for the entire /16 network. The NFS mount works correctly on the same subnet, but when it crosses subnets it will not work.  There's no firewalling or ACL's between subnets and other types of traffic like SSH, etc. work fine.  

I'm trying to eliminate the possibility of it could be a network issue.  Has anyone seen something like this before and have any suggestions?  Thanks!

[schumaku]

Many things can go wrong when it comes to NFS.

Where is the routing done, and how?

Start witch checking the Kernel logs on the mount and on the server side.

[Clay35]

It's a simple layer 2 network with the gateways of the subnets going to a firewall.  There aren't any rules on the firewall for the inside interface.  I look in the firewall logs and anything related to NFS is being allowed.  I can get to ports 111 and 2049 on the NFS server, but it will not mount.

I've been told nothing unusual with the kernel logs at all.  We have turned firewalls on the NFS server and the client with the same result.