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Re: need sd card backup on r-pi-3b



But what's the purpose of having the gateway fields in interfaces if
not to to be reliant on the routing table?

But it's worth a shot, something like
route add default gw 192.168.71.1
It's simple enough to undo it with
route del default
to take it back out if it doesn't work.

I dunno, I haven't manually messed with routing tables in years.  They
can be  a bear on a laptop that gets moved between networks but since
I retired my laptop never goes anywhere.  Gateway is one of the fields
handled by DHCP but it looks like you don't use that.

Never liked DHCP much but I'm getting used to it since my phone (wifi
router) doesn't give me a choice.  I set up machine names in
/etc/hostname and those become visible over the air.  So I can ping,
ftp, ssh whatever upstairs, zero, hp but only as long as I keep my
phone bill paid and it all works.


On 9/24/17, Gene Heskett <gheskett@shentel.net> wrote:
> On Sunday 24 September 2017 04:34:50 Mark Morgan Lloyd wrote:
>
>> On 23/09/17 20:00, Gene Heskett wrote:
>
>> I'd suggest checking using  traceroute -I  and then looking at  route
>> -n and/or  ip route ls  which should give you a bit more of an
>> indication of what's going on. IME this sort of thing is usually
>> because the router isn't NATting the entire 192.168.x.x range.
>
> As said before, traceroute is not installed.
>
> But I may have found a buglet.
>
> In the route -n output, no gateway has been assigned:
>
> root@rock64Sheldon:/etc/network/interfaces.d# route -n
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags Metric Ref    Use
> Iface
> 0.0.0.0         0.0.0.0         0.0.0.0         U     202    0        0
> eth0
> 169.254.0.0     0.0.0.0         255.255.0.0     U     202    0        0
> eth0
> 192.168.71.0    0.0.0.0         255.255.255.0   U     0      0        0
> eth0
>
> yet in /etc/network/interfaces.d/eth0 it is:
> allow-hotplug eth0
> auto eth0
> iface eth0 inet static
> address 192.168.71.2/24
> gateway 192.168.71.1
> =============================
> Same stuff from the pi running jessie
> auto eth0
>
> # regular network for coyote.den
> iface eth0 inet static
> address 192.168.71.12
> netmask 255.255.255.0
> gateway 192.168.71.1
>
> And pi@picnc:~ $ route -n
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags Metric Ref    Use
> Iface
> 0.0.0.0         192.168.71.1    0.0.0.0         UG    0      0        0
> eth0
> 192.168.71.0    0.0.0.0         255.255.255.0   U     0      0        0
> eth0
>
> end of jessie version
>
> Of course its not going to work w/o a gateway, but wth?
>
> Need a coffee IV.
>
> Thanks Mark.
>
> Cheers, Gene Heskett
> --
> "There are four boxes to be used in defense of liberty:
>  soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> Genes Web page <http://geneslinuxbox.net:6309/gene>
>
>


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