[U-Boot-Users] Network problem in u-boot.

[U-Boot-Users] Network problem in u-boot.

[André Berggren]

Hi Stefan,

CONFIG_NET_MULTI wasn't enabled. When I enable it the "miiphy_register: non
unique device name 'ppc_4xx_eth0'" is exchanged with "Trying ppc_4xx_eth0", but it doesn't solve the main problem.
See output below.

=> run setup
Trying ppc_4xx_eth0
ENET Speed is 100 Mbps - FULL duplex connection
BOOTP broadcast 1
DHCPHandler: got packet: (src=67, dst=68, len=300) state: 3
Filtering pkt = 0
DHCPHandler: got DHCP packet: (src=67, dst=68, len=300) state: 3
DHCP: state=SELECTING bp_file: "/tftpboot/kernel.img"
TRANSITIONING TO REQUESTING STATE
Bootfile: /tftpboot/kernel.img
DhcpSendRequestPkt: Sending DHCPREQUEST
Transmitting DHCPREQUEST packet: len = 343
DHCPHandler: got packet: (src=67, dst=68, len=300) state: 4
Filtering pkt = 0
DHCPHandler: got DHCP packet: (src=67, dst=68, len=300) state: 4
DHCP State: REQUESTING
Bootfile: /tftpboot/kernel.img
DHCP client bound to address 172.18.22.66
Using ppc_4xx_eth0 device
TFTP from server 172.18.22.110; our IP address is 172.18.22.66
Filename '/tftpboot/kernel.img'.
Load address: 0x200000
Loading: #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #########################################################T T T Trying ppc_4xx_eth0
T T Trying ppc_4xx_eth0
T T T Trying ppc_4xx_eth0
T T Trying ppc_4xx_eth0

Retry count exceeded; starting again
Trying ppc_4xx_eth0
ENET Speed is 100 Mbps - FULL duplex connection
BOOTP broadcast 1
BOOTP broadcast 2
Trying ppc_4xx_eth0
BOOTP broadcast 3
BOOTP broadcast 4
BOOTP broadcast 5
Trying ppc_4xx_eth0

Retry count exceeded; starting again
Trying ppc_4xx_eth0
ENET Speed is 100 Mbps - FULL duplex connection
Trying ppc_4xx_eth0
BOOTP broadcast 1


//Andr?



-----Original Message-----
From: Stefan Roese [mailto:sr at denx.de]
Sent: den 16 november 2005 18:53
To: u-boot-users at lists.sourceforge.net
Cc: Andr? Berggren; Wolfgang Denk
Subject: Re: [U-Boot-Users] Network problem in u-boot.


Hi Andre,

On Wednesday 16 November 2005 14:09, Andr? Berggren wrote:
> I made some more tests and found that the old 405enet driver wont halt
> forever like the old 440 and the latest 4xx driver does. The old 405enet
> only outputs "ENET Speed is 100 Mbps - FULL duplex connection" sleeps for a
> while and then resumes the transfer.
>
> Observe that the problem only occurs when another computer send packets to
> u-boot or broadcasting on the network. If non of this occurs the transfer
> is always successful.

OK.

> I enabled debug and got following output:
>
> => run setup
> miiphy_register: non unique device name 'ppc_4xx_eth0'
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

This is a problem recently added to the 4xx ethernet driver. I haven't found 
the time to fix it yet.

> ENET Speed is 100 Mbps - FULL duplex connection
> BOOTP broadcast 1
> DHCPHandler: got packet: (src=67, dst=68, len=300) state: 3
> Filtering pkt = 0
> DHCPHandler: got DHCP packet: (src=67, dst=68, len=300) state: 3
> DHCP: state=SELECTING bp_file: "/tftpboot/kernel.img"
> TRANSITIONING TO REQUESTING STATE
> Bootfile: /tftpboot/kernel.img
> DhcpSendRequestPkt: Sending DHCPREQUEST
> Transmitting DHCPREQUEST packet: len = 343
> DHCPHandler: got packet: (src=67, dst=68, len=300) state: 4
> Filtering pkt = 0
> DHCPHandler: got DHCP packet: (src=67, dst=68, len=300) state: 4
> DHCP State: REQUESTING
> Bootfile: /tftpboot/kernel.img
> DHCP client bound to address 172.18.22.66
> TFTP from server 172.18.22.110; our IP address is 172.18.22.66
> Filename '/tftpboot/kernel.img'.
> Load address: 0x200000
> Loading: #################################################################
>          #################################################################
>          #################################################################
>          #################################################################
>          ##########################################T miiphy_register: non
> unique device name 'ppc_4xx_eth0'
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

See above.

I assume, that you don't have CONFIG_NET_MULTI enabled right now. Correct? As 
a simple workaround for this problem, please enable CONFIG_NET_MULTI in your 
config file. And please let me know, if this helped.

Best regards,
Stefan
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[U-Boot-Users] Network problem in u-boot.

[Stefan Roese]

Hi Andre,

On Thursday 17 November 2005 09:55, Andr? Berggren wrote:
> CONFIG_NET_MULTI wasn't enabled. When I enable it the "miiphy_register: non
> unique device name 'ppc_4xx_eth0'" is exchanged with "Trying ppc_4xx_eth0",
> but it doesn't solve the main problem.

OK. One other idea: Do you have CFG_RX_ETH_BUFFER defined in your config file? 
If yes, what is the value? Try increasing it. I would suggest to use at least 
16 rx buffers.

Best regards,
Stefan

[U-Boot-Users] Network problem in u-boot.

[André Berggren]

Hi Stefan,

In Linux we use a driver that is backported by Eugene Surovegin. I belive it?s the driver he recently commited into 2.6er kernel.org.

We use the 440ep on a custom bord based on bamboo. The old u-boot driver have the same problem, but it recover and resumes. No reset is needed. I belive it?s one of the last 405gp_enet.c before it got merged into 4xx_enet.c. The version of 405gp_enet.c that I used was 1.14.

Example:
ENET Speed is 100 Mbps - FULL duplex connection
TFTP from server 172.18.22.110; our IP address is 172.18.22.66
Filename '/tftpboot/vovproto2/root.img'.
Load address: 0x1000000
Loading: #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################T T ENET Speed is 100 Mbps - FULL duplex connection
T ################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         ##################################################
done
Bytes transferred = 10235349 (9c2dd5 hex)
## Booting image at 00200000 ...


//Andre

-----Original Message-----
From: Stefan Roese [mailto:sr at denx.de]
Sent: den 17 november 2005 11:34
To: u-boot-users at lists.sourceforge.net
Cc: Andr? Berggren; Wolfgang Denk
Subject: Re: [U-Boot-Users] Network problem in u-boot.


Hi Andre,

On Thursday 17 November 2005 11:13, Andr? Berggren wrote:
> I tried to define INFO_4XX_ENET in 4xx_enet.c and got the following output
> when the problem occurs.

<snip>

> Filename '/tftpboot/kernel.img'.
> Load address: 0x200000
> Loading: #################################################################
>          #################################################################
>          #################################################################
>          #################################################################
>          #################################################################
>          #######T T
> MAL error occured.... ISR = c0100010 UIC = = 2  MAL_DEF = e0100000 
> MAL_ERR= e0000000 Trying ppc_4xx_eth0
> About preceeding transfer (eth0):
> - Sent packet number 3319
> - Received packet number 3321
> - Handled packet number 3321
> T T

> We had problem with MAL error in Linux to untill we got a backport of the
> latest driver to our kernel. After that there is no problem in Linux.

Hmmm. What do you mean with the lastes driver? The new driver from Eugene 
Surovegin recently commited into 2.6er kernel.org? Or the latest 2.4er EMAC 
driver?

What ppc do you use? 405GP, 405GPr or 405EP? You mentioned, that an older 
U-Boot driver didn't have this problem, right? What U-Boot version was it and 
from when?

Best regards,
Stefan
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[U-Boot-Users] Network problem in u-boot.

[André Berggren]

Hi Stefan,

Yes CFG_RX_ETH_BUFFER is defined to 32.

I tried to define INFO_4XX_ENET in 4xx_enet.c and got the following output when the problem occurs.

=> run setup
Trying ppc_4xx_eth0
About preceeding transfer (eth0):
- Sent packet number 10626
- Received packet number 10632
- Handled packet number 10632
ENET Speed is 100 Mbps - FULL duplex connection
BOOTP broadcast 1
DHCPHandler: got packet: (src=67, dst=68, len=300) state: 3
Filtering pkt = 0
DHCPHandler: got DHCP packet: (src=67, dst=68, len=300) state: 3
DHCP: state=SELECTING bp_file: "/tftpboot/kernel.img"
TRANSITIONING TO REQUESTING STATE
Bootfile: /tftpboot/kernel.img
DhcpSendRequestPkt: Sending DHCPREQUEST
Transmitting DHCPREQUEST packet: len = 343
DHCPHandler: got packet: (src=67, dst=68, len=300) state: 4
Filtering pkt = 0
DHCPHandler: got DHCP packet: (src=67, dst=68, len=300) state: 4
DHCP State: REQUESTING
Bootfile: /tftpboot/kernel.img
DHCP client bound to address 172.18.22.66
Using ppc_4xx_eth0 device
TFTP from server 172.18.22.110; our IP address is 172.18.22.66
Filename '/tftpboot/kernel.img'.
Load address: 0x200000
Loading: #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #######T T
MAL error occured.... ISR = c0100010 UIC = = 2  MAL_DEF = e0100000  MAL_ERR= e0000000
Trying ppc_4xx_eth0
About preceeding transfer (eth0):
- Sent packet number 3319
- Received packet number 3321
- Handled packet number 3321
T T
MAL error occured.... ISR = c0100010 UIC = = 2  MAL_DEF = e0100000  MAL_ERR= e0000000
Trying ppc_4xx_eth0
About preceeding transfer (eth0):
- Sent packet number 2
- Received packet number 0
- Handled packet number 0
T T
MAL error occured.... ISR = c0100010 UIC = = 2  MAL_DEF = e0100000  MAL_ERR= e0000000
Trying ppc_4xx_eth0
About preceeding transfer (eth0):
- Sent packet number 2
- Received packet number 0
- Handled packet number 0
T T
MAL error occured.... ISR = c0100010 UIC = = 2  MAL_DEF = e0100000  MAL_ERR= e0000000
Trying ppc_4xx_eth0
About preceeding transfer (eth0):
- Sent packet number 2
- Received packet number 0
- Handled packet number 0
T T
Abort

We had problem with MAL error in Linux to untill we got a backport of the latest driver to our kernel. After that there is no problem in Linux.

//Andr?

-----Original Message-----
From: Stefan Roese [mailto:sr at denx.de]
Sent: den 17 november 2005 10:58
To: u-boot-users at lists.sourceforge.net
Cc: Andr? Berggren; Wolfgang Denk
Subject: Re: [U-Boot-Users] Network problem in u-boot.


Hi Andre,

On Thursday 17 November 2005 09:55, Andr? Berggren wrote:
> CONFIG_NET_MULTI wasn't enabled. When I enable it the "miiphy_register: non
> unique device name 'ppc_4xx_eth0'" is exchanged with "Trying ppc_4xx_eth0",
> but it doesn't solve the main problem.

OK. One other idea: Do you have CFG_RX_ETH_BUFFER defined in your config file? 
If yes, what is the value? Try increasing it. I would suggest to use at least 
16 rx buffers.

Best regards,
Stefan
###########################################

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[U-Boot-Users] Network problem in u-boot.

[Stefan Roese]

Hi Andre,

On Thursday 17 November 2005 11:13, Andr? Berggren wrote:
> I tried to define INFO_4XX_ENET in 4xx_enet.c and got the following output
> when the problem occurs.

<snip>

> Filename '/tftpboot/kernel.img'.
> Load address: 0x200000
> Loading: #################################################################
>          #################################################################
>          #################################################################
>          #################################################################
>          #################################################################
>          #######T T
> MAL error occured.... ISR = c0100010 UIC = = 2  MAL_DEF = e0100000 
> MAL_ERR= e0000000 Trying ppc_4xx_eth0
> About preceeding transfer (eth0):
> - Sent packet number 3319
> - Received packet number 3321
> - Handled packet number 3321
> T T

> We had problem with MAL error in Linux to untill we got a backport of the
> latest driver to our kernel. After that there is no problem in Linux.

Hmmm. What do you mean with the lastes driver? The new driver from Eugene 
Surovegin recently commited into 2.6er kernel.org? Or the latest 2.4er EMAC 
driver?

What ppc do you use? 405GP, 405GPr or 405EP? You mentioned, that an older 
U-Boot driver didn't have this problem, right? What U-Boot version was it and 
from when?

Best regards,
Stefan

[U-Boot-Users] Network problem in u-boot.

[André Berggren]

Hi again.

I made some more tests and found that the old 405enet driver wont halt forever like the old 440 and the latest 4xx driver does. The old 405enet only outputs "ENET Speed is 100 Mbps - FULL duplex connection" sleeps for a while and then resumes the transfer.

Observe that the problem only occurs when another computer send packets to u-boot or broadcasting on the network. If non of this occurs the transfer is always successful.
  
I enabled debug and got following output:

=> run setup
miiphy_register: non unique device name 'ppc_4xx_eth0'
ENET Speed is 100 Mbps - FULL duplex connection
BOOTP broadcast 1
DHCPHandler: got packet: (src=67, dst=68, len=300) state: 3
Filtering pkt = 0
DHCPHandler: got DHCP packet: (src=67, dst=68, len=300) state: 3
DHCP: state=SELECTING bp_file: "/tftpboot/kernel.img"
TRANSITIONING TO REQUESTING STATE
Bootfile: /tftpboot/kernel.img
DhcpSendRequestPkt: Sending DHCPREQUEST
Transmitting DHCPREQUEST packet: len = 343
DHCPHandler: got packet: (src=67, dst=68, len=300) state: 4
Filtering pkt = 0
DHCPHandler: got DHCP packet: (src=67, dst=68, len=300) state: 4
DHCP State: REQUESTING
Bootfile: /tftpboot/kernel.img
DHCP client bound to address 172.18.22.66
TFTP from server 172.18.22.110; our IP address is 172.18.22.66
Filename '/tftpboot/kernel.img'.
Load address: 0x200000
Loading: #################################################################
         #################################################################
         #################################################################
         #################################################################
         ##########################################T miiphy_register: non unique device name 'ppc_4xx_eth0'
ENET Speed is 100 Mbps - FULL duplex connection
T T miiphy_register: non unique device name 'ppc_4xx_eth0'
ENET Speed is 100 Mbps - FULL duplex connection
T T T miiphy_register: non unique device name 'ppc_4xx_eth0'
ENET Speed is 100 Mbps - FULL duplex connection
T T T miiphy_register: non unique device name 'ppc_4xx_eth0'
ENET Speed is 100 Mbps - FULL duplex connection
T miiphy_register: non unique device name 'ppc_4xx_eth0'
ENET Speed is 100 Mbps - FULL duplex connection

Retry count exceeded; starting again
miiphy_register: non unique device name 'ppc_4xx_eth0'
ENET Speed is 100 Mbps - FULL duplex connection
BOOTP broadcast 1
BOOTP broadcast 2
miiphy_register: non unique device name 'ppc_4xx_eth0'
ENET Speed is 100 Mbps - FULL duplex connection
BOOTP broadcast 3
BOOTP broadcast 4
BOOTP broadcast 5
miiphy_register: non unique device name 'ppc_4xx_eth0'
ENET Speed is 100 Mbps - FULL duplex connection

Retry count exceeded; starting again

Abort


//Andr?


-----Original Message-----
From: u-boot-users-admin@lists.sourceforge.net
[mailto:u-boot-users-admin at lists.sourceforge.net]On Behalf Of Andr?
Berggren
Sent: den 14 november 2005 16:34
To: Stefan Roese; u-boot-users at lists.sourceforge.net
Cc: Wolfgang Denk
Subject: RE: [U-Boot-Users] Network problem in u-boot.


Hi!
Yes the mac is valid.
I use 100Mbps FD and bootp to get an adress. U-boot gets IP 172.18.22.66 and netmask is 255.255.255.0

I?ll try to enable debugging later and post the results.

//Andre

-----Original Message-----
From: Stefan Roese [mailto:sr at denx.de]
Sent: den 14 november 2005 16:20
To: u-boot-users at lists.sourceforge.net
Cc: Wolfgang Denk; Andr? Berggren
Subject: Re: [U-Boot-Users] Network problem in u-boot.


On Monday 14 November 2005 16:12, Wolfgang Denk wrote:
> > The problem is that sometimes the network in u-boot stops, e.g. just
> > getting TTT in a tftp transfer. I foud out that this occurs when another
> > packet not involed in the tftp fransfer arrives. It could be a
> > TCP-connect attempt from another host to u-boot or a ARP request. With a
> > network sniffer I can se that u-boot still send data, but all data
> > ariving is never processed. A reset of the board is needed to get it up
> > and running again.
> >
> > The board is a custom bord whith AMCC440ep based on bamboo.
>
> I cannot confirm this. I just tested approx. 20 downloads on a bamboo
> board without any such problems.
>
> What exactly is your network configuration? 10 / 100 Mbps? FD / HD?
> IP addresses? Netmask?

And do you use a valid MAC address? Did you try to enable debugging in the 4xx 
ethernet driver? If not, please do this and post some results here.

Viele Gr??e,
Stefan
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[U-Boot-Users] Network problem in u-boot.

[Stefan Roese]

Hi Andre,

On Wednesday 16 November 2005 14:09, Andr? Berggren wrote:
> I made some more tests and found that the old 405enet driver wont halt
> forever like the old 440 and the latest 4xx driver does. The old 405enet
> only outputs "ENET Speed is 100 Mbps - FULL duplex connection" sleeps for a
> while and then resumes the transfer.
>
> Observe that the problem only occurs when another computer send packets to
> u-boot or broadcasting on the network. If non of this occurs the transfer
> is always successful.

OK.

> I enabled debug and got following output:
>
> => run setup
> miiphy_register: non unique device name 'ppc_4xx_eth0'
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

This is a problem recently added to the 4xx ethernet driver. I haven't found 
the time to fix it yet.

> ENET Speed is 100 Mbps - FULL duplex connection
> BOOTP broadcast 1
> DHCPHandler: got packet: (src=67, dst=68, len=300) state: 3
> Filtering pkt = 0
> DHCPHandler: got DHCP packet: (src=67, dst=68, len=300) state: 3
> DHCP: state=SELECTING bp_file: "/tftpboot/kernel.img"
> TRANSITIONING TO REQUESTING STATE
> Bootfile: /tftpboot/kernel.img
> DhcpSendRequestPkt: Sending DHCPREQUEST
> Transmitting DHCPREQUEST packet: len = 343
> DHCPHandler: got packet: (src=67, dst=68, len=300) state: 4
> Filtering pkt = 0
> DHCPHandler: got DHCP packet: (src=67, dst=68, len=300) state: 4
> DHCP State: REQUESTING
> Bootfile: /tftpboot/kernel.img
> DHCP client bound to address 172.18.22.66
> TFTP from server 172.18.22.110; our IP address is 172.18.22.66
> Filename '/tftpboot/kernel.img'.
> Load address: 0x200000
> Loading: #################################################################
>          #################################################################
>          #################################################################
>          #################################################################
>          ##########################################T miiphy_register: non
> unique device name 'ppc_4xx_eth0'
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

See above.

I assume, that you don't have CONFIG_NET_MULTI enabled right now. Correct? As 
a simple workaround for this problem, please enable CONFIG_NET_MULTI in your 
config file. And please let me know, if this helped.

Best regards,
Stefan

[U-Boot-Users] Network problem in u-boot.

[André Berggren]

Hi!
Yes the mac is valid.
I use 100Mbps FD and bootp to get an adress. U-boot gets IP 172.18.22.66 and netmask is 255.255.255.0

I?ll try to enable debugging later and post the results.

//Andre

-----Original Message-----
From: Stefan Roese [mailto:sr at denx.de]
Sent: den 14 november 2005 16:20
To: u-boot-users at lists.sourceforge.net
Cc: Wolfgang Denk; Andr? Berggren
Subject: Re: [U-Boot-Users] Network problem in u-boot.


On Monday 14 November 2005 16:12, Wolfgang Denk wrote:
> > The problem is that sometimes the network in u-boot stops, e.g. just
> > getting TTT in a tftp transfer. I foud out that this occurs when another
> > packet not involed in the tftp fransfer arrives. It could be a
> > TCP-connect attempt from another host to u-boot or a ARP request. With a
> > network sniffer I can se that u-boot still send data, but all data
> > ariving is never processed. A reset of the board is needed to get it up
> > and running again.
> >
> > The board is a custom bord whith AMCC440ep based on bamboo.
>
> I cannot confirm this. I just tested approx. 20 downloads on a bamboo
> board without any such problems.
>
> What exactly is your network configuration? 10 / 100 Mbps? FD / HD?
> IP addresses? Netmask?

And do you use a valid MAC address? Did you try to enable debugging in the 4xx 
ethernet driver? If not, please do this and post some results here.

Viele Gr??e,
Stefan
###########################################

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[U-Boot-Users] Network problem in u-boot.

[André Berggren]

Hi all!

I make a new post on the same problem since I found out some new info.

The problem is that sometimes the network in u-boot stops, e.g. just getting TTT in a tftp transfer. I foud out that this occurs when another packet not involed in the tftp fransfer arrives. It could be a TCP-connect attempt from another host to u-boot or a ARP request. With a network sniffer I can se that u-boot still send data, but all data ariving is never processed. A reset of the board is needed to get it up and running again.

The board is a custom bord whith AMCC440ep based on bamboo. 

//Andr?
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[U-Boot-Users] Network problem in u-boot.

[Wolfgang Denk]

In message <518B77BB6246D54D9E88FC49AFB0389D2F1C41@seskoptronicmsx.optronic.local> you wrote:
> 
> I make a new post on the same problem since I found out some new info.

Please read the netiquette. It would have been muchbetter to  post  a
follow-up  so  the complete thread of this discussion would have been
visible.

> The problem is that sometimes the network in u-boot stops, e.g. just
> getting TTT in a tftp transfer. I foud out that this occurs when another
> packet not involed in the tftp fransfer arrives. It could be a
> TCP-connect attempt from another host to u-boot or a ARP request. With a
> network sniffer I can se that u-boot still send data, but all data
> ariving is never processed. A reset of the board is needed to get it up
> and running again.
> 
> The board is a custom bord whith AMCC440ep based on bamboo. 

I cannot confirm this. I just tested approx. 20 downloads on a bamboo
board without any such problems.

What exactly is your network configuration? 10 / 100 Mbps? FD / HD?
IP addresses? Netmask?


Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Every solution breeds new problems.

[U-Boot-Users] Network problem in u-boot.

[Stefan Roese]

On Monday 14 November 2005 16:12, Wolfgang Denk wrote:
> > The problem is that sometimes the network in u-boot stops, e.g. just
> > getting TTT in a tftp transfer. I foud out that this occurs when another
> > packet not involed in the tftp fransfer arrives. It could be a
> > TCP-connect attempt from another host to u-boot or a ARP request. With a
> > network sniffer I can se that u-boot still send data, but all data
> > ariving is never processed. A reset of the board is needed to get it up
> > and running again.
> >
> > The board is a custom bord whith AMCC440ep based on bamboo.
>
> I cannot confirm this. I just tested approx. 20 downloads on a bamboo
> board without any such problems.
>
> What exactly is your network configuration? 10 / 100 Mbps? FD / HD?
> IP addresses? Netmask?

And do you use a valid MAC address? Did you try to enable debugging in the 4xx 
ethernet driver? If not, please do this and post some results here.

Viele Gr??e,
Stefan