The support for the orion crypto is only for 5182 not for 6281 (the plug u are using).
the crypto support on LSP based on 2.6.22 is by using external package (OCF) and special dm-crypt patch developed by Marvell...

Pls try disabling IP configuration at all and give it a try, dont use dhcp and dont use setting static IP, leave the IP that was assigned by U-Boot through the command line.

first u can see on your log that it boot from NFS"eth0: link up, full duplex, speed 100 Mbps
Looking up port of RPC 100005/1 on 192.168.178.21
VFS: Mounted root (nfs filesystem).
Freeing init memory: 124K
 * Setting preliminary keymap...           

I think your problem is that when u boot from NFS u should disbale dhcp on your boot scripts...

The thread u pointed is a little messy...
Pls describe your exact steps.

No and No

u probably missed something on the u-boot env.
pls send a dump of the u-boot env and the boot log..

last suggestion will work.
U-boot will only replace the env variable for the first setting i.e.
setenv y $(x)

if x==55
y will get 55
if x==$(z) and z==44
y will get $(z)

pls send the full log, start with U-Boot prompt, then do printenv and then run rcvr and send the entire output.

which kernel are u using?
do u run heavy load on the plug, or leave it "idle"?

grep for NETFILTER_XT_MATCH_STATE on the kernel Kconfig files (probably the one under "net/") and check on what is it depended on and follow it...

I think u can use sysrq only if u have a uart connection, which u dont...

I think it won't work...
U-Boot is burned using 4bit ECC including its env variable,
While your Linux probably support only 1 bit ECC.

For the NAND found on the SheevaPlug, 1 bit ECC should be enough since it have an SLC Nand.
However the KW BootROM support only 4bit ECC or none, so it better use the 4 bit ECC...

I think there are few options, all are not simple:
1) Changing the U-Boot to treat the env variable with 1 bit ECC.
2) Rewrite the user tool so it will write to the MTD without ECC and write the 4bit ECC to the OOB manually.
3) Add 4 bit ECC to the Linux, this will be part of future LSP releases, it should be safer for MLC NAND, however it will slow down the NAND access.

Oh, I think I found the prblem, pls try to roll back this patch...

diff -Naur a/arch/arm/mach-feroceon-kw/kw_family/boardEnv/mvBoardEnvSpec.c b/arch/arm/mach-feroceon-kw/kw_family/boardEnv/mvBoardEnvSpec.c
--- a/arch/arm/mach-feroceon-kw/kw_family/boardEnv/mvBoardEnvSpec.c   2009-03-15 16:30:51.000000000 +0200
+++ b/arch/arm/mach-feroceon-kw/kw_family/boardEnv/mvBoardEnvSpec.c   2009-03-19 14:22:21.000000000 +0200
@@ -682,7 +682,7 @@
 #define SHEEVA_PLUG_BOARD_PCI_IF_NUM              0x0
 #define SHEEVA_PLUG_BOARD_TWSI_DEF_NUM              0x0
 #define SHEEVA_PLUG_BOARD_MAC_INFO_NUM              0x1
-#define SHEEVA_PLUG_BOARD_GPP_INFO_NUM              0x0
+#define SHEEVA_PLUG_BOARD_GPP_INFO_NUM              0x1
 #define SHEEVA_PLUG_BOARD_MPP_GROUP_TYPE_NUN        0x1
 #define SHEEVA_PLUG_BOARD_MPP_CONFIG_NUM          0x1
 #define SHEEVA_PLUG_BOARD_DEVICE_CONFIG_NUM           0x1
@@ -699,6 +699,11 @@
    /* {{MV_BOARD_DEV_CLASS   devClass, MV_U8   twsiDevAddr, MV_U8 twsiDevAddrType}} */
    {{BOARD_TWSI_OTHER, 0x0, ADDR7_BIT}};
 
+MV_BOARD_GPP_INFO sheevaPlugInfoBoardGppInfo[] =
+   /* {{MV_BOARD_GPP_CLASS   devClass, MV_U8   gppPinNum}} */
+   {{BOARD_GPP_SDIO_DETECT, 47}
+   };
+
 MV_BOARD_MPP_TYPE_INFO sheevaPlugInfoBoardMppTypeInfo[] =
    {{MV_BOARD_OTHER, MV_BOARD_OTHER}
    };
@@ -733,7 +738,7 @@
    SHEEVA_PLUG_BOARD_MAC_INFO_NUM,             /* numBoardMacInfo */
    sheevaPlugInfoBoardMacInfo,
    SHEEVA_PLUG_BOARD_GPP_INFO_NUM,             /* numBoardGppInfo */
-   0,
+   sheevaPlugInfoBoardGppInfo,
    SHEEVA_PLUG_BOARD_DEBUG_LED_NUM,         /* activeLedsNumber */             
    sheevaPlugInfoBoardDebugLedIf,
    0,                              /* ledsPolarity */      
diff -Naur a/arch/arm/mach-feroceon-kw/kw_family/boardEnv/mvBoardEnvSpec.h b/arch/arm/mach-feroceon-kw/kw_family/boardEnv/mvBoardEnvSpec.h
--- a/arch/arm/mach-feroceon-kw/kw_family/boardEnv/mvBoardEnvSpec.h   2009-03-15 16:31:22.000000000 +0200
+++ b/arch/arm/mach-feroceon-kw/kw_family/boardEnv/mvBoardEnvSpec.h   2009-03-19 14:30:36.000000000 +0200
@@ -238,7 +238,7 @@
 #define RD_SHEEVA_PLUG_MPP40_47                 0x00000000
 #define RD_SHEEVA_PLUG_MPP48_55                 0x00000000
 #define RD_SHEEVA_PLUG_OE_LOW                   (BIT29)
-#define RD_SHEEVA_PLUG_OE_HIGH                  0x0
+#define RD_SHEEVA_PLUG_OE_HIGH                  (BIT15)
 #define RD_SHEEVA_PLUG_OE_VAL_LOW               0x0
 #define RD_SHEEVA_PLUG_OE_VAL_HIGH              0x20000




if u cant because of copy paste syntax issue then unroll this manually:
arch/arm/mach-feroceon-kw/kw_family/boardEnv/mvBoardEnvSpec.c
    SHEEVA_PLUG_BOARD_GPP_INFO_NUM,             /* numBoardGppInfo */
-   0,
+   sheevaPlugInfoBoardGppInfo,
    SHEEVA_PLUG_BOARD_DEBUG_LED_NUM,         /* activeLedsNumber */             

2.6.22.18 without the LSP cant be used for the SHeevPlug,
u can get the LSP+2.6.22.18 from:
http://openplug.org/index.php/resources/downloads?func=showdown&id=23

or even try the uImage directly from:
http://openplug.org/index.php/resources/downloads?func=select&id=3