* [U-Boot] ip address confusion.
2009-10-23 12:32 [U-Boot] ip address confusion David Collier
@ 2009-10-23 13:09 ` Jerry Van Baren
2009-10-23 14:18 ` Ben Warren
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: Jerry Van Baren @ 2009-10-23 13:09 UTC (permalink / raw)
To: u-boot
David Collier wrote:
> Our office network runs on
>
> 10.213.1.1/24
10.213.1.1/15 per your netmask.
> so all addresses in 10.212 and 10.213 should be local.
>
> and I have a TFTP server on 10.213.1.105
>
> if I set my office pc to 10.212.0.99 I can ping 10.213.1.105
>
> so far so good
>
> -----------------------------------------
> if I set u-boot up so the printenv at power-on looks like
>
> ethaddr=00:90:46:20:000:99
> eth1addr=00:90:46:20:100:99
> ipaddr=10.212.000.99
> serverip=10.213.1.105
> gatewayip=10.213.1.1
> netmask=255.254.0.0
> bootfile=99/uImage
> ethact=macb1
>
> then if I do
>
> ping 10.213.1.105
>
> it fails.
>
> but after setting
>
> setenv ipaddr 10.213.0.99
>
> it works
>
> Can anyone suggest why?
It smells like your netmask is not what you think it is. The difference
in the addresses is .212. vs. .213. and it sounds like a gateway issue.
Note that your gateway is in .213. land so, if your netmask is
255.255.0.0, the gateway will not be reachable from .212. land.
Please capture your console interaction and post it directly. Your list
above is playing Chinese Whispers, resulting in unreliable communications.
<http://en.wikipedia.org/wiki/Chinese_whispers>
You may also want to do a printenv before and after (critical) commands
to verify things didn't change on you.
FWIIW, when someone asks me "why doesn't the system do X" or says "the
system did X", I *always* say "show me" - users often filter out
important information because they don't realize that it is important...
which is exactly why the system isn't doing X and exactly why the user
is surprised by that.
> David Collier
gvb
^ permalink raw reply [flat|nested] 5+ messages in thread* [U-Boot] ip address confusion.
2009-10-23 12:32 [U-Boot] ip address confusion David Collier
2009-10-23 13:09 ` Jerry Van Baren
@ 2009-10-23 14:18 ` Ben Warren
2009-10-23 18:09 ` David Collier
2009-10-23 19:18 ` David Collier
3 siblings, 0 replies; 5+ messages in thread
From: Ben Warren @ 2009-10-23 14:18 UTC (permalink / raw)
To: u-boot
David,
On Fri, Oct 23, 2009 at 5:32 AM, David Collier
<from_denx_uboot@dexdyne.com>wrote:
>
> Our office network runs on
>
> 10.213.1.1/24
>
> so all addresses in 10.212 and 10.213 should be local.
>
As Jerry mentioned, this is not correct. 10.212 and 10.213 are on different
subnets if your mask is 24 bits in size:
10.212 = 0b00001010.0b11010100
10.213 = 0b00001010.0b11010101
As you can see, they only have 15 bits in common, so for them to be in the
same subnet (no routing required) your network would have to be
10.212.0.0/15 at the minimum.
>
> and I have a TFTP server on 10.213.1.105
>
> if I set my office pc to 10.212.0.99 I can ping 10.213.1.105
>
If this is so and the netmask listed above is correct, there's probably a
router on 10.212. Running traceroute will tell you for sure.
>
> so far so good
>
> -----------------------------------------
> if I set u-boot up so the printenv at power-on looks like
>
> ethaddr=00:90:46:20:000:99
> eth1addr=00:90:46:20:100:99
> ipaddr=10.212.000.99
> serverip=10.213.1.105
> gatewayip=10.213.1.1
Try setting this to 10.212.1.1 and see what happens.
> netmask=255.254.0.0
> bootfile=99/uImage
> ethact=macb1
>
> then if I do
>
> ping 10.213.1.105
>
> it fails.
>
> but after setting
>
> setenv ipaddr 10.213.0.99
>
No surprise.
>
> it works
>
> Can anyone suggest why?
>
> David Collier
>
> regards,
Ben
^ permalink raw reply [flat|nested] 5+ messages in thread
* [U-Boot] ip address confusion.
2009-10-23 12:32 [U-Boot] ip address confusion David Collier
2009-10-23 13:09 ` Jerry Van Baren
2009-10-23 14:18 ` Ben Warren
@ 2009-10-23 18:09 ` David Collier
2009-10-23 19:18 ` David Collier
3 siblings, 0 replies; 5+ messages in thread
From: David Collier @ 2009-10-23 18:09 UTC (permalink / raw)
To: u-boot
pardon me everyone - I'm an idiot.
Sorry.
David
In article <memo.20091023133244.2092V@postmaster+dexdyne.com.cix.co.uk>,
from_denx_uboot at dexdyne.com (David Collier) wrote:
> *From:* "David Collier" <from_denx_uboot@dexdyne.com>
> *To:* u-boot at lists.denx.de
> *Date:* Fri, 23 Oct 2009 13:32 +0100 (BST)
>
> Our office network runs on
>
> 10.213.1.1/24
>
> so all addresses in 10.212 and 10.213 should be local.
>
> and I have a TFTP server on 10.213.1.105
>
> if I set my office pc to 10.212.0.99 I can ping 10.213.1.105
>
> so far so good
>
> -----------------------------------------
> if I set u-boot up so the printenv at power-on looks like
>
> ethaddr=00:90:46:20:000:99
> eth1addr=00:90:46:20:100:99
> ipaddr=10.212.000.99
> serverip=10.213.1.105
> gatewayip=10.213.1.1
> netmask=255.254.0.0
> bootfile=99/uImage
> ethact=macb1
>
> then if I do
>
> ping 10.213.1.105
>
> it fails.
>
> but after setting
>
> setenv ipaddr 10.213.0.99
>
> it works
>
> Can anyone suggest why?
>
> David Collier
>
> www.dexdyne.com
> _______________________________________________
> U-Boot mailing list
> U-Boot at lists.denx.de
> http://lists.denx.de/mailman/listinfo/u-boot
>
David Collier
www.dexdyne.com
^ permalink raw reply [flat|nested] 5+ messages in thread
* [U-Boot] ip address confusion.
2009-10-23 12:32 [U-Boot] ip address confusion David Collier
` (2 preceding siblings ...)
2009-10-23 18:09 ` David Collier
@ 2009-10-23 19:18 ` David Collier
3 siblings, 0 replies; 5+ messages in thread
From: David Collier @ 2009-10-23 19:18 UTC (permalink / raw)
To: u-boot
right - pardon my stupidity... I mis-typed above...
I've dug into this and I can tftp fine to the server, but it doesn't
respond to ping - so I guess it's a setup issue on the ping server s/w
Thanks all for your patience
D.
^ permalink raw reply [flat|nested] 5+ messages in thread