[Buildroot] target not ping-able

[Buildroot] target not ping-able

[Woody Wu]

Hi, list

My generated target system (kernel and rootfs) is not ping-able.  From
the target I can ping outside, but hosts, even on the same ethernet
subnetwork cannot ping my target.

The kernel is 3.4.19 and I enabled network options and an Ethernet
driver.  Is there anything I missed?

Thanks in advance.

-- 
woody
I can't go back to yesterday - because I was a different person then.

[Buildroot] target not ping-able

[Arnout Vandecappelle]

On 04/12/12 05:37, Woody Wu wrote:
> Hi, list
>
> My generated target system (kernel and rootfs) is not ping-able.  From
> the target I can ping outside, but hosts, even on the same ethernet
> subnetwork cannot ping my target.
>
> The kernel is 3.4.19 and I enabled network options and an Ethernet
> driver.  Is there anything I missed?

  This is unlikely to be buildroot-related...

  I would do a wireshark on the host to get more insight.  You can also build
a tcpdump for the target to verify if it even receives anything.  Also try with
a direct cable between host and target and static IP addresses, to rule out any
influence of the switch.  And one final thing I can think of is that there is
some netfilter rule that disallows ping replies.

  Regards,
  Arnout
-- 
Arnout Vandecappelle                               arnout at mind be
Senior Embedded Software Architect                 +32-16-286540
Essensium/Mind                                     http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium                BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
GPG fingerprint:  7CB5 E4CC 6C2E EFD4 6E3D A754 F963 ECAB 2450 2F1F

[Buildroot] target not ping-able

[Woody Wu]

On 2012-12-05, Arnout Vandecappelle
<arnout@mind.be> wrote:
> On 04/12/12 05:37, Woody Wu wrote:
>> Hi, list
>>
>> My generated target system (kernel and rootfs) is not ping-able.
>> From the target I can ping outside, but hosts, even on the same
>> ethernet subnetwork cannot ping my target.
>>
>> The kernel is 3.4.19 and I enabled network options and an Ethernet
>> driver.  Is there anything I missed?
>
>   This is unlikely to be buildroot-related...
>
>   I would do a wireshark on the host to get more insight.  You can
>   also build a tcpdump for the target to verify if it even receives
>   anything.  Also try with a direct cable between host and target and
>   static IP addresses, to rule out any influence of the switch.  And
>   one final thing I can think of is that there is some netfilter rule
>   that disallows ping replies.
>

Thanks Arnout, I will do these experiments shortly.

-- 
woody
I can't go back to yesterday - because I was a different person then.