dhclient + dhclient-script + "routers" DHCP option+ FIB?

[Julian Elischer]

On 2/2/15 9:23 PM, Lev Serebryakov wrote:
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> On 02.02.2015 14:09, Julian Elischer wrote:
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>> Is it possible to add routes, passed from DHCP server, not to
>> default FIB but to FIB specified in /etc/dhclient.conf?
>>> I don't believe so directly. There is no place to specify that
>>> information.. HOWEVER once you have done a DCHP server
>>> discovery, you could possibly make multiple requests with
>>> different identification information.  It would probably mean
>>> that you should have a different alias for each FIB to request
>>> from. It might be best to make the packets appear as if they have
>>> come through a dhcp relay in some way. I think it depends on what
>>> information the dhcpd is keying on, Usually its the MAC address
>>> which is a problem.
>   I'm asking as CLIENT administrator, not SERVER one. I need to acquire
> configuration information from my ISP, but apply "default route" not
> to default FIB. It is why I mention "/etc/dhclient.conf" :)

the client runs a script after getting the lease
you can put whatever you want in there.
/sbin/dhclient-script

it also looks for and runs
  /etc/dhclient-enter-hooks and  /etc/dhclient-exit-hooks
and you can put whatever you want in there as well.

check the man pages for some details
  julian at vps1:man -k dhclient
dhclient(8)              - Dynamic Host Configuration Protocol (DHCP) 
client
dhclient-script(8)       - DHCP client network configuration script
dhclient.conf(5)         - DHCP client configuration file
dhclient.leases(5)       - DHCP client lease database




>
> - -- 
> // Lev Serebryakov
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