Comment 4 for bug 606523

Appears to be related to overlay'd IP addresses. With the clientaddr specified, this has not happened since.

Adding clientaddr=135.149.75.130 may have fixed this.
tonic:/home on /import/tonic type nfs (rw,nolock,tcp,rsize=32768,wsize=32768,noacl,clientaddr=135.149.75.130,sloppy,addr=135.149.75.130)

0 #> ifconfig
eth0 Link encap:Ethernet HWaddr 00:17:08:50:dd:52
          inet addr:135.149.75.130 Bcast:135.149.75.255 Mask:255.255.255.0
          inet6 addr: fe80::217:8ff:fe50:dd52/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:48928413 errors:0 dropped:0 overruns:0 frame:0
          TX packets:90708433 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:7286982784 (7.2 GB) TX bytes:124013948263 (124.0 GB)
          Interrupt:28

eth0:1 Link encap:Ethernet HWaddr 00:17:08:50:dd:52
          inet addr:135.149.75.70 Bcast:135.149.75.255 Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          Interrupt:28