Re: Interface sequencing
On Wed, Nov 05, 2014 at 01:23:20PM EST, Jason Adams wrote:
> On 11/05/2014 07:48 AM, Stefan Olsson wrote:
> > is it not enough to just append the following to /etc/dhclient.conf?:
^
> > interface "em0" {
> > ignore routers;
> > }
>
> Without the encapsulating {} braces, it does NOT work.
> No documentation on hostname.if suggested using braces, so it never
> occurred to me.
As above - you are looking in the wrong place.
man 5 dhclient.conf
OTHER DECLARATIONS
[...]
interface "name" { declaration; ...; }
A client with more than one network interface may require
different behaviour depending on which interface is being
configured. [...]
Regards,
rjc
Re: Interface sequencing
On November 5, 2014 7:23:20 PM CET, Jason Adams wrote:
>On 11/05/2014 07:48 AM, Stefan Olsson wrote:
>>> That needs to go in a dhclient config file, you'll need different
>config
>>> files for each interface and run dhclient from a hostname.if line
>like
>>> "!dhclient -c /etc/dhclient-nogw em0".
>> is it not enough to just append the following to /etc/dhclient.conf?:
>>
>> interface "em0" {
>> ignore routers;
>> }
>>
>
>Without the encapsulating {} braces, it does NOT work.
>No documentation on hostname.if suggested using braces, so it never
>occurred to me.
Well, this isn't hostname.if...
/Alexander
>
>I'll try with your syntax, but to date nothing has been reliable other
>than
>switching cat 5 cable.
Re: Interface sequencing
Stefan Olsson schreef op 5-11-2014 om 16:48:
>> That needs to go in a dhclient config file, you'll need different config
>> files for each interface and run dhclient from a hostname.if line like
>> "!dhclient -c /etc/dhclient-nogw em0".
> is it not enough to just append the following to /etc/dhclient.conf?:
>
> interface "em0" {
> ignore routers;
> }
You will get dns pushed though, and I doubt if you want to use the
internal or the external ones...
Re: Interface sequencing
On 11/05/2014 12:30 AM, Stuart Henderson wrote: > This is a bit of an unusual setup though. Normally on a host which has both > "internal" and "internet" interfaces you would hardcode the address of the > internal one. Agreed, its sort of odd. Its an instrumentation polling machine, which runs periodic ssh connections to remote stations and grabs a boatload of data, reduces it and stores the juicy bits on a local database. The internal net is all dhcp in almost every installation where this runs. The easiest expedient would be to swap wires, but explaining that to the customer is kind of embarrassing and its one of those things that you sit down to write the documentation, and realize its just too dumb to write down. ;-)
Re: Interface sequencing
On 11/05/2014 07:48 AM, Stefan Olsson wrote:
>> That needs to go in a dhclient config file, you'll need different config
>> files for each interface and run dhclient from a hostname.if line like
>> "!dhclient -c /etc/dhclient-nogw em0".
> is it not enough to just append the following to /etc/dhclient.conf?:
>
> interface "em0" {
> ignore routers;
> }
>
Without the encapsulating {} braces, it does NOT work.
No documentation on hostname.if suggested using braces, so it never occurred to
me.
I'll try with your syntax, but to date nothing has been reliable other than
switching cat 5 cable.
Re: Interface sequencing
On 2014/11/05 10:48, Stefan Olsson wrote:
> > That needs to go in a dhclient config file, you'll need different config
> > files for each interface and run dhclient from a hostname.if line like
> > "!dhclient -c /etc/dhclient-nogw em0".
>
> is it not enough to just append the following to /etc/dhclient.conf?:
>
> interface "em0" {
> ignore routers;
> }
Oh, I wasn't aware of that possibility. Yes that should work :)
Re: Interface sequencing
> That needs to go in a dhclient config file, you'll need different config
> files for each interface and run dhclient from a hostname.if line like
> "!dhclient -c /etc/dhclient-nogw em0".
is it not enough to just append the following to /etc/dhclient.conf?:
interface "em0" {
ignore routers;
}
Re: Interface sequencing
On 2014-11-04, Jason Adams wrote: > On 11/04/2014 11:52 AM, Ted Unangst wrote: >> On Tue, Nov 04, 2014 at 11:21, Jason Adams wrote: >> >>> So can anyone point me to the settings where the sequence of bringing up >>> interfaces is controlled at >>> boot time? Or am I just going to have to set default gateway after it is >>> booted by something in >>> rc.local? >> /etc/netstart executes hostname.* which will be in alphabetical, then >> numerical, order. echo /etc/hostname.* will show you the order if you >> want to check it. > > Yes, well that's the problem. I need them brought up in non-alphabetical > order. That will probably only work temporarily (if at all), I think the lease will expire and get refreshed. > But Jan Vlach sent me a message (not via list) that I might be able to add > a "ignore routers" option to the hostname.if file that I do not > want as a gateway. That needs to go in a dhclient config file, you'll need different config files for each interface and run dhclient from a hostname.if line like "!dhclient -c /etc/dhclient-nogw em0". This is a bit of an unusual setup though. Normally on a host which has both "internal" and "internet" interfaces you would hardcode the address of the internal one.
Re: Interface sequencing
On 2014-11-04, trondd wrote: > Doesn't the default route go to the egress interface? No, it's the other way round.
Re: Interface sequencing
On 11/04/2014 11:52 AM, Ted Unangst wrote: > On Tue, Nov 04, 2014 at 11:21, Jason Adams wrote: > >> So can anyone point me to the settings where the sequence of bringing up >> interfaces is controlled at >> boot time? Or am I just going to have to set default gateway after it is >> booted by something in >> rc.local? > /etc/netstart executes hostname.* which will be in alphabetical, then > numerical, order. echo /etc/hostname.* will show you the order if you > want to check it. Yes, well that's the problem. I need them brought up in non-alphabetical order. But Jan Vlach sent me a message (not via list) that I might be able to add a "ignore routers" option to the hostname.if file that I do not want as a gateway. I will play with this...
Re: Interface sequencing
On Tue, Nov 4, 2014 at 2:52 PM, Ted Unangst wrote: > On Tue, Nov 04, 2014 at 11:21, Jason Adams wrote: > > > So can anyone point me to the settings where the sequence of bringing up > > interfaces is controlled at > > boot time? Or am I just going to have to set default gateway after it is > > booted by something in > > rc.local? > > /etc/netstart executes hostname.* which will be in alphabetical, then > numerical, order. echo /etc/hostname.* will show you the order if you > want to check it. > > Can you explicitly add the external interface to group egress and explicitly exclude the other one? Doesn't the default route go to the egress interface? Tim.
Re: Interface sequencing
On Tue, Nov 04, 2014 at 11:21, Jason Adams wrote: > So can anyone point me to the settings where the sequence of bringing up > interfaces is controlled at > boot time? Or am I just going to have to set default gateway after it is > booted by something in > rc.local? /etc/netstart executes hostname.* which will be in alphabetical, then numerical, order. echo /etc/hostname.* will show you the order if you want to check it.
Interface sequencing
Newbie here... Machine not intended to be a router, just to have two interfaced, one to local lan, second to a cable modem. Both interfaces connected to networks which supply dhcp address. Both work. Upon boot, both interfaces come up fine, but the default gateway gets set to my lan network. I want the default gateway to be via the cable modem, I don't want the traffic this machine will be generating to be going over my lan. It ignores /etc/mygate because both are dhcp. If I disconnect the lan wire, and run netstart again, the default gateway is set correctly to the cable modem, then reconnect the lan, and run netstart yet again the default gateway remains pointed to the cable modem as I want. So can anyone point me to the settings where the sequence of bringing up interfaces is controlled at boot time? Or am I just going to have to set default gateway after it is booted by something in rc.local?
