booting rtems over the network?

Jack Cawkwell J.Cawkwell at open.ac.uk
Wed Jun 12 19:05:47 UTC 2002


Thanks for that Ian, ifconfig tells me that the MTU is 1500.
so I guess that is not the problem?

ianc at microsol.iinet.net.au writes:
>Hi Jack,
>
>This sounds like your Linux server is fragmenting the packets it is 
>sending to your target.
>
>Use the following command to check that your MTU for the Ethernet port 
>is set to 1500.
>
>ifconfig
>
>If the MTU is set to less than 1500, the stack on the linux box may be 
>fragmenting the bootp response.
>
>regards,
>
>Ian Caddy
>
>
>Jack Cawkwell wrote:
>
>>Hi,
>>
>>Please can someone help with booting RTEMS (i386) across a network.
>>
>>I have setup bootp and tftp on a Linux server, and the debugging
>>messages suggest that the bootp server part is working (appears to
>>be doing something sensible). tftp is working from the same server.
>>
>>The ROM image is read from a floppy on the client, and was obtained
>>from http://www.rom-o-matic.net, choosing the correct version for
>>the network card, and selecting the boot from floppy option.
>>
>>The client boots, tries various network modes, and when it finds a
>>working one, broadcasts, and then the server responds,
>>
>>at the client:
>>
>>Searching for server (DHCP)...
>>ALERT: got a fragmented packet reconfigure your server
>>
>>at the server:
>>
>>bootpd[30134]: bootptab mtime: Sun Jun  9 11:56:48 2002
>>bootpd[30134]: request from Ethernet address 00:D0:09:F1:E3:C1
>>bootpd[30134]: found 192.168.1.1 (pablo)
>>bootpd[30134]: bootfile="/tftpboot/picodemo8.nbi"
>>bootpd[30134]: vendor magic field is 99.130.83.99
>>bootpd[30134]: request message length=548
>>bootpd[30134]: request has DHCP msglen=1500
>>bootpd[30134]: extended reply, length=1500, options=1264
>>bootpd[30134]: Received: DHCPDISCOVER
>>bootpd[30134]: Sent: DHCPOFFER
>>bootpd[30134]: sending reply (with RFC1048 options)
>>bootpd[30134]: setarp 192.168.1.1 - 00:D0:09:F1:E3:C1
>>
>>I conclude that the boot image is wrong. I have tried many
>>combinations of arguments to mknbi both with an RTEMS boot
>>image and with a linux image. I must have missed something
>>as none of the images work. They all produce the same message,
>>
>>ALERT: got a fragmented packet reconfigure your server
>>
>>Any suggestions would be welcome.
>>
>>Thanks, Jack
>>
>>
>>
>>  
>>
>
>-- 
>
>ianc at microsol.iinet.net.au
>Microsol (Aust) Pty Ltd
>
>Phone: (+61) 08 9473 6600
>Fax:   (+61) 08 9473 6699 
>
>
>
>






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