Hi Ruslanas,

The tripleo documentation have a decent section[1] on deploying an
overcloud with overcloud nodes on a routed network. It shows how to
configure the remote networks in undercloud configuration, what
addresses the dhcp-relay should forward requests to and how to set the
baremetal port's physical network attribute (i.e what maps host A to
network A, and host B to network B).


--
Harald

[1] https://docs.openstack.org/project-deploy-guide/tripleo-docs/latest/features/routed_spine_leaf_network.html


On Tue, 2020-04-14 at 08:19 +0200, Ruslanas Gžibovskis wrote:
> Hi all,
>
> My remote network is a different one: 10.41.94.240/28, just in case
> :)
>
> Should I add the remote network or subnet to my existing network in
> undercloud? Or new subnet, which is configured on remote site?
> if yes,
>   how to specify, that A host should be used on the A network, and B
> host on the B network.
>   how to add it?
> fi
>
> I believe FW is all to all. But at this stage, my main concern is
> that I do not get any info into log in dnsmasq.log
>
> Any thoughts?
>
>
> On Sun, 12 Apr 2020 at 21:39, Ruslanas Gžibovskis <ruslanas@lpic.lt>
> wrote:
> > Hi all,
> >
> > Could someone help me, I do not get, I try to boot remote host
> > (behind Firewall). I have dhcp-relay configured. And finally, I see
> > the DHCP request, but nothing else happens... except me crying ;'(
> > "D
> >
> >
> > DHCP request captured on undercloud vnet5 where dhcp is listening
> > also on eth1, But I am not able to load a remote host. I had a
> > thought, maybe DHCP is generally not working, but one node which is
> > local, I am able to introspect and provide it.
> > completely nothing in /var/log/containers/ironic-
> > inspector/dnsmasq.log
> >
> > Any suggestions?
> >
> > My network, which I used and have configured on undercloud host is:
> > 10.120.191.80/28 and IP for DHCP which is configured as dhcp relay
> > is 94.
> >
> > output from tcpdump:
> > 21:19:00.058565 40:a6:77:4b:07:cb > 52:54:00:20:c1:dc, ethertype
> > IPv4 (0x0800), length 590: (tos 0x0, ttl 58, id 60458, offset 0,
> > flags [none], proto UDP (17), length 576)
> >     10.41.94.241.67 > 10.120.191.94.67: [udp sum ok] BOOTP/DHCP,
> > Request from 24:6e:96:14:a1:a4, length 548, hops 1, xid 0x9614a1a4,
> > secs 12, Flags [Broadcast] (0x8000)
> >  Gateway-IP 10.41.94.241
> >  Client-Ethernet-Address 24:6e:96:14:a1:a4
> >  Vendor-rfc1048 Extensions
> >    Magic Cookie 0x63825363
> >    DHCP-Message Option 53, length 1: Discover
> >    Parameter-Request Option 55, length 36:
> >      Subnet-Mask, Time-Zone, Default-Gateway, Time-Server
> >      IEN-Name-Server, Domain-Name-Server, RL, Hostname
> >      BS, Domain-Name, SS, RP
> >      EP, RSZ, TTL, BR
> >      YD, YS, NTP, Vendor-Option
> >      Requested-IP, Lease-Time, Server-ID, RN
> >      RB, Vendor-Class, TFTP, BF
> >      Option 128, Option 129, Option 130, Option 131
> >      Option 132, Option 133, Option 134, Option 135
> >    MSZ Option 57, length 2: 1260
> >    GUID Option 97, length 17:
> > 0.68.69.76.76.57.0.16.56.128.80.200.192.79.56.68.50
> >    ARCH Option 93, length 2: 0
> >    NDI Option 94, length 3: 1.2.1
> >    Vendor-Class Option 60, length 32:
> > "PXEClient:Arch:00000:UNDI:002001"
> >
> > --
> > Ruslanas Gžibovskis
> > +370 6030 7030
>
>