Booting from NFS

Latest revision as of 10:36, 10 February 2012

[edit] Configure NFS Root

To boot from NFS, add the following entry via serial console: (See U-Boot section on how to access an bootloader):

setenv bootargs_nfs root=/dev/nfs nfsroot=192.168.0.200:/export/openmoko
    ip=192.168.0.202:192.168.0.200:192.168.0.200:255.255.255.0:ezx:usb0:off
    rootdelay=5 console=ttySAC0,115200 console=tty0 loglevel=8

setenv menu_5 Boot from NFS: setenv bootargs \${bootargs_nfs} \${mtdparts} \;
    nand read.e 0x32000000 kernel\; bootm 0x32000000

saveenv

[edit] Use Static MAC Addresses

The random MAC addresses generated by the USB Ethernet gadget code caused me some grief on the host side. To generate static addresses, I added the following variable to the menu_5 bootargs:

setenv bootargs_usb g_ether.host_addr=00:1b:11:1b:08:18 g_ether.dev_addr=00:1b:11:1b:08:19

[edit] Configure Your Firewall

Another thing to keep in mind is your firewall. I was getting messages like this:

Looking up port of RPC 100003/2 on 192.168.0.200
portmap: server 192.168.0.200 not responding, timed out
Root-NFS: Unable to get nfsd port number from server, using default
Looking up port of RPC 100005/1 on 192.168.0.200
portmap: server 192.168.0.200 not responding, timed out
Root-NFS: Unable to get mountd port number from server, using default
mount: server 192.168.0.200 not responding, timed out
Root-NFS: Server returned error -5 while mounting /srv/root

After I updated my firewall to pass NFS traffic over the interface to the Neo1973, everything worked smoothly.