Hi, While trying to find out why our NSF/ZFS servers now hangs about once a week, I got hold of a similiar box, and got a bit more ambitious, I connected it via 2 NICs, to complicate things a bit, the server boots via pxeboot (ie, is datatless). After fiddling with the default gateway, adding -h to rpcbind and mountd, things seem ok, but UDP is 'problematic', I could do with TCP except that am-utils does a fsinfo via UDP when doing a /net/<host> and will hang the client. even with vfs.nfs.nfs_ip_paranoia=0, when the response from the server arrives with the 'wrong' ip, an ICMP destination unreachable (port unreachable) is replied. in short, on the client: this works: mount_nfs -o mntudp server-ip-vlanA:/mnt /mnt this fails: mount_nfs -o mntudp server-ip-vlanB:/mnt /mnt since the response is coming from server-ip-vlanA. Q: why does this work for TCP and fails for UDP Q: is there a workaround? danny