nfs udp problem

[Alexander Samad <alex@samad.com.au>]

Hi

I am having problems mounting mu nfs shares via udp, if i flip to tcp
all is well.


14:49:35.415978 IP 192.168.10.221.330032314 > 192.168.11.10.2049: 40 null
14:49:35.415978 IP 192.168.10.221.330032314 > 192.168.11.10.2049: 40 null
14:49:35.416097 IP 192.168.11.10.2049 > 192.168.10.221.330032314:
reply ok 24 null
14:49:35.416114 IP 192.168.11.10.2049 > 192.168.10.221.330032314:
reply ok 24 null


this is a capture of the packets flow on the nfs machine
(192.168.11.10) the client has made request
mount -o vers=4,udp  nfs:/exports/video /exports/video/

the second packet - the reply is not making it back to the laptop - I
have check with another box on the wire to see if it see the second
packet but it doesn't

change the udp to tcp and it works.

the reason i have 2 copies of each packet is I am using a bridge, and
you see the packet from the br0 and from eth0


auto br0
allow-hotplug br0
iface br0 inet static
        bridge_ports eth0 eth1 eth2 eth3 vde0
        bridge_stp on
        address 192.168.11.10
        network 192.168.11.0
        netmask 255.255.255.0
        gateway 192.168.11.1
        broadcast 192.168.11.255
        pre-up ifconfig eth0 up
        pre-up ifconfig eth1 up
        pre-up ifconfig eth2 up
        pre-up ifconfig eth3 up
        pre-up ifconfig vde0 up
        down ifconfig eth0 down
        down ifconfig eth1 down
        down ifconfig eth2 down
        down ifconfig eth3 down
        post-up /sbin/ip -6 addr add dev br0 fe80:11::10/64 || true
        post-up sysctl -w net.ipv6.conf.br0.autoconf=0 || true
        post-up /sbin/ip -6 r a default via fe80:11::1 dev  br0 advmss
1440 metric 50 || true
        post-up /sbin/ip -6 a flush eth0 || true
        post-up /sbin/ip -6 a flush eth1 || true
        post-up /sbin/ip -6 a flush eth2 || true
        post-up /sbin/ip -6 a flush eth3 || true

if I change the mount options to vers=3, then I getting a locking time out.

I am stumped - I have tried bringing down the bridge interface and
just use eth0, but same problem.

I am stuck, I want to use udp, becuase when my machine goes to sleep,
the nfs just works afterwards, no need to umount and then remount and

Alex