Failover without shared-network?

[Ken Roberts]

Having thought about this, I can see a couple questions coming up that I
suspect you'll want the answers to.
Here's what I changed below:
  - Domain names, host names and similar stuff changed.
  - Failover-related stuff, the ports are randomized.  In the real file,
both ports are the same number, similar in range to the ones shown.  All
other failover stuff is identical to the file.
  - Comments removed.
  - Redundant VLAN examples removed, meaning all VLANs which do not have
dhcp follow the same model as the one shown, and all VLANs which DO have
dhcp follow the form shown.
  - Every feature in the file is represented by at least one similar
construct in the examples.
  - If the original file references a thing by dns name, then the
example does likewise.

Thanks.

On Tue, 2006-07-18 at 12:30, Ken Roberts wrote:

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> On Tue, 2006-07-18 at 12:03, David W. Hankins wrote:
> 
> > On Tue, Jul 18, 2006 at 11:57:09AM -0500, Ken Roberts wrote:
> > > The first problem started with me trying to configure it, and the server
> > > refused to start because the stuff wasn't inside a shared-network.  At
> > > that point I discovered the documentation on that requirement, I thought
> > > in the man page for dhcpd.conf(5) but it doesn't seem to be there now.
> > 
> > Can you provide a config snippet of what didn't work?
> > 
> > That might make the problem obvious to us.
> 
> 
> OK, I have a dhcpd.conf and a dhcpd.master here.  Hopefully I didn't
> chop out too much.
> 
> Note that DDNS does not work, so some of the declarations won't make
> sense.  That's a much smaller issue to me, so I'll work on that later.
> 
> 
> 
> 
> -- Attached file included as plaintext by Ecartis --
> -- File: dhcpd.conf
> 
> failover peer "dhcp" {
>   primary;
>   address dhcp1.my.net;  # Address THIS server listens on for failover traffic.
>   port 12345;                # port is not yet defined in standards, so we need this.
>   peer address dhcp2.my.net; # Address of failover peer.
>   peer port 12359;
>   max-response-delay 60;
>   max-unacked-updates 10;
>   mclt 3600;  # max client lead time, defined on primary only.
>   split 128;  # must be 128, defined on primary only.
>   load balance max seconds 3;
> }
> 
> include "/etc/dhcp/dhcpd.master";
> 
> 
> -- Attached file included as plaintext by Ecartis --
> -- File: dhcpd.master
> 
> ddns-update-style interim;
> 
> default-lease-time 2400;
> max-lease-time 2400;
> dynamic-bootp-lease-length 2400;
> 
> ddns-domainname "MY.DOMAIN";
> do-forward-updates true;
> 
> 
> option netbios-name-servers 192.168.2.21,172.19.200.105;          # wins server
> option domain-name "my.net.";
> option domain-name-servers 192.168.3.12,192.168.2.11;
> 
> update-static-leases true;
> always-reply-rfc1048 true;
> 
> 
> option fqdn.no-client-update false;                   # clients should not update dns dynamically.
> option ntp-servers tick.my.net, tock.my.net; # time servers
> option nntp-server nntp.xo.com;
> option www-server w3.my.net;
> deny unknown-clients;
> 
> subnet 192.168.2.0 netmask 255.255.255.0 {
>   # NO DHCP!
>   authoritative;
>   deny unknown-clients;
>   option routers 192.168.2.1;
>   host mercury       { fixed-address 192.168.2.11; hardware ethernet 00:01:03:25:80:89; }
>   host mars          { fixed-address 192.168.2.14; hardware ethernet 00:01:03:25:6F:93; }
>   # more host declarations...
> }
> 
> subnet 192.168.6.0 netmask 255.255.255.0 {
>   # VLAN 6
>   authoritative;
>   ddns-updates on;
>   allow unknown-clients;
>   option routers 192.168.6.1;
>   pool {
>     deny dynamic bootp clients;
>     failover peer "dhcp";
>     range 192.168.6.100 192.168.6.254;
>   }
> }
> 
> subnet 192.168.8.0 netmask 255.255.255.0 {
>   # VLAN 8
>   allow unknown-clients;
>   allow client-updates;
>   authoritative;
>   ddns-updates on;
>   option routers 192.168.8.1;
>   pool {
>     deny dynamic bootp clients;
>     failover peer "dhcp";
>     range 192.168.8.100 192.168.8.254;
>   }
> }
> 
> 
> 
>