[Server-devel] Help for unreliable ADSL and cable modems: bounce-eth0.sh

[Xavier Carcelle]

Dear Martin,

Could you give the exact model and reference of this cable-modem and
potentially the SoC (System on Chip) and the Ethernet chip used on
this modem to dig the driver issues.

Is it running Linux on the cable-modem ?

My best,

Xavier.

On Mon, Jul 26, 2010 at 10:40 PM, Martin Langhoff <martin at laptop.org> wrote:
> Working with Juan in La Rioja, we had in our hands cablemodems with
> several oddities:
>
>  - We were using a 'straight' cat5, and sometimes the NIC would not
> see that the modem was connected right after boot. This may well be a
> bug in the NIC driver. Using a crossover cable, or a shorter cable, or
> bouncing the interface the problem disappeared.
>
>  - Sometimes the modem would not give us a DHCP lease right after
> booting. A second request would work.
>
>  - The modem would give a private address (192.168 netblock) when it
> didn't have a working connection. With a working connection, it would
> give a public IP address. The lease time for the first lease was long,
> so...
>
> this is an ad-hoc script, appropriate as-is only for the La Rioja
> deployment. But I suspect other deployments will see unreliable modems
> out there...
>
> cheers,
>
>
> m
> --
>  martin at laptop.org -- School Server Architect
>  - ask interesting questions
>  - don't get distracted with shiny stuff  - working code first
>  - http://wiki.laptop.org/go/User:Martinlanghoff
>
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