<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Andale Mono; font-size: 10pt; color: #000000'>My bad - I should have just said it was NOT ICMP :)<br><br><div><br></div><hr id="zwchr"><blockquote style="border-left:2px solid rgb(16, 16, 255);margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><b>From: </b>"Niall O'Reilly" <Niall.oReilly@ucd.ie><br><b>To: </b>"Users of ISC DHCP" <dhcp-users@lists.isc.org><br><b>Sent: </b>Wednesday, March 14, 2012 11:42:37 AM<br><b>Subject: </b>Re: Failover communication<br><br><br>On 14 Mar 2012, at 14:55, perl-list wrote:<br><br>> I believe it is UDP.<br><br> Why?<br> Here's what's in the documentation (man page for dhcpd.conf):<br><br> The port statement<br><br> port port-number;<br><br> The port statement declares the TCP port on which the server should<br> listen for connections from its failover peer. This statement may<br> be omitted, in which case the IANA assigned port number 647 will be<br> used by default.<br><br> Best regards,<br> Niall O'Reilly<br><br>_______________________________________________<br>dhcp-users mailing list<br>dhcp-users@lists.isc.org<br>https://lists.isc.org/mailman/listinfo/dhcp-users<br><br></blockquote><br></div></body></html>