Query on default gateway with DHCP vs Static address

[SIMON BABY]

Hi Peter,
Thank you so much for helping.

Yes, I am using ISC dhcpd. My query is with ISC DHCPd I can ping to any
network, but I did not see the ISC gateway in the kernel route table. Will
it be stored somewhere else so that when packet goes out, the hardware
(NIC) gets this information?

Regards
Simon

On Thu, Mar 18, 2021 at 5:07 PM Peter Yardley <
peter.martin.yardley at gmail.com> wrote:

> Hi,
>
> This is prolly a problem with your configuration. Are you using ISC DHCPd?
> If so could provide a relevant snippet of your configuration, anonymised if
> necessary.
>
> I used to configure subnets like this …
>
> subnet 10.20.50.0 netmask 255.255.254.0 {
>     option subnet-mask 255.255.254.0;
>     option broadcast-address 10.20.51.255;
>     option routers 10.20.50.1;
>
>     pool {
>         # A device for Blah
>         host HMTXYZ           { hardware ethernet 00:40:9d:54:4c:c7;
>                                         fixed-address 10.20.50.32; }
>         …
>
>         range 10.20.51.0 138.25.51.254;
>     }
>
> Of course there are many other correct possiblities
>
>
> > On 19 Mar 2021, at 10:03 am, SIMON BABY <simonkbaby at gmail.com> wrote:
> >
> > Hi,
> > I have a query about the DHCP provided IP address vs Static IP address
> configured manually.  When i get the IP address from DHCP, I can ping to
> 8.8.8.8 (google public server) where as
> > with a statically configured IP address, I could not.  When I looked
> into the route table (route -n ), I did not see any default gateway with
> DHCP or Statically configured IP.  (I am testing with Linux).
> >
> > 1. Can I know when the packet goes out , how did the hardware (NIC) find
> the default gateway in the case of the DHCP provided IP address since I did
> not see any default gw IP in the routing table?
> > 2. With statically configured IP, if I explicitly configure a default
> GW, I can see packets are going out and receiving. I can see the default GW
> in the routing table. Do I need a default GW to send packets from a
> statically configured IP address ?
> >
> > Thank you for your time
> >
> > Regards
> > Simon
> >
> > _______________________________________________
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> >
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>
> Peter Yardley
> peter.martin.yardley at gmail.com
>
> _______________________________________________
> ISC funds the development of this software with paid support
> subscriptions. Contact us at https://www.isc.org/contact/ for more
> information.
>
> dhcp-users mailing list
> dhcp-users at lists.isc.org
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>
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