<div dir="ltr">Hi Simon,<div><br></div><div>Thanks for the reply, I did not know if it was a bug or the correct behavior.<br><br>If I may, let me ask you a follow up question. Does DHCP relay works well with a pair of DHCP servers in failover mode?<br><br>I've configured the relay agent described in my previous email to forward the messages to the pair of DHCP servers. Now everytime the relay agent forwards a discovery message from the host, I receive 2 dhcp offers, one from each server. As I've configured split to 128, only 1 server should reply with an offer.<br><br>If I test the same configuration with hosts in the same subnet as the DHCP servers, the behavior is as expected. The DHCP servers <u>responds or ignores</u> the discovery messages according to the result of the hash based on the MAC address of the hosts.<br><br>Any idea what might be the problem? Is it even a good idea to run a relay agent and a pair of DHCP servers in failover?<br><br>Thanks!<br>Gerónimo.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Jun 15, 2015 at 6:18 PM, Simon Hobson <span dir="ltr"><<a href="mailto:dhcp1@thehobsons.co.uk" target="_blank">dhcp1@thehobsons.co.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">Gero Palacio <<a href="mailto:gero.palacio@gmail.com">gero.palacio@gmail.com</a>> wrote:<br>
<br>
> CLIENT <---> [eth0] (relay agent) ROUTER-1 [eth1] <---> ROUTER-2 <---> DHCP Server<br>
><br>
> The relay agent runs ONLY on the interface that faces the client, which is eth0: "dhcrelay -4 -i eth0 10.0.1.10"<br>
</span>...<br>
<span class="">> Can anybody tell me if I'm doing something wrong? Is this a known bug?<br>
<br>
</span>It's a known feature. You must also listen on eth1 in order to get the replies from the server - it's just the way the relay agent works.<br>
<br>
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