<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body text="#000000" bgcolor="#FFFFCC">
<p><br>
</p>
<br>
<div class="moz-cite-prefix">On 16/11/2017 17:47,
<a class="moz-txt-link-abbreviated" href="mailto:robert@spotswood-computer.net">robert@spotswood-computer.net</a> wrote:<br>
</div>
<blockquote type="cite"
cite="mid:530ff96683dfcae277abb4cbeb7f7a0f.squirrel@email.powweb.com">
<pre wrap="">I can see the solicits in the dhcp server logs, so I think that's
definitive that they are reaching the server. The advertises should show
up there too, but just in case I'm wrong, I ran wireshark on the server.
Saw the solicits as expected, but 0 advertises.</pre>
</blockquote>
Ok, just something that bit me.<br>
<blockquote type="cite"
cite="mid:530ff96683dfcae277abb4cbeb7f7a0f.squirrel@email.powweb.com">
<pre wrap="">
</pre>
<blockquote type="cite">
<pre wrap="">
On 16/11/2017 17:05, <a class="moz-txt-link-abbreviated" href="mailto:robert@spotswood-computer.net">robert@spotswood-computer.net</a> wrote:
</pre>
<blockquote type="cite">
<pre wrap="">I've trying to retire an old Debian server (v7 Wheezy). I've new one
built
(really a VM) and installed (v9 - Stretch). One by one, I'm moving the
services over. Going well, until I hit the IPv6 dhcp server. The ipv4
dhcp
server went smooth.
The old server is running isc-dhcp-server 4.2.2, while the new server is
running isc-dhcp-server 4.3.5.
I copied the configuration file, but not the lease database from old
server. Then I stopped the old ipv6 (and ipv4) dhcp servers and started
the new ones. The ipv6 dhcp server starts, and is listening, but it is
not
handing out addresses. I tested with two Windows machine: ipconfig
/release6 then ipconfig /renew6. Both machines had an ipv6 address from
the old dhcp server, so it's not a client problem, and can renew said
address.
Out of frustration, I copied the old database to the new server and
restarted. Still not working.
I finally fired up wireshark on the client, and the problem seems to be
there are no advertise reply to the solicit from the client, which does
show up in the dhcpd logs. So the server sees the request, but doesn't
answer it.
I checked the ip6tables and everything is accept, so it's not a firewall
issue. Any ideas?
</pre>
</blockquote>
<pre wrap="">You may want to try Wireshark on the server to see if the request
actually gets there.
Could be an issue with switches along the way. I had an issue with a
switch that was set to prevent DDOS attacks and blocked packets with
identical source and destination ports. Removing that check made a lot
of things work again.
</pre>
<blockquote type="cite">
<pre wrap="">
== config file ==
default-lease-time 6048;
max-lease-time 6048;
log-facility local7;
ddns-updates on;
ddns-update-style interim;
update-static-leases on;
authoritative;
#log-facility debug;
subnet6 fd00:220:0:1::/64 {
#Range for clients
range6 fd00:220:0:1::601 fd00:220:0:1::800;
#Additional options
option dhcp6.name-servers fd00:220:0:1::40, fd00:220:0:1::50;
option dhcp6.domain-search "redacted.name";
}
</pre>
</blockquote>
<pre wrap="">--
Best regards
Sten Carlsen
</pre>
</blockquote>
<pre wrap="">
_______________________________________________
dhcp-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:dhcp-users@lists.isc.org">dhcp-users@lists.isc.org</a>
<a class="moz-txt-link-freetext" href="https://lists.isc.org/mailman/listinfo/dhcp-users">https://lists.isc.org/mailman/listinfo/dhcp-users</a>
</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Best regards
Sten Carlsen
No improvements come from shouting:
"MALE BOVINE MANURE!!!"
</pre>
</body>
</html>