<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><blockquote type="cite"><span class="content">An address conflict occurs when two hosts use the
same IP address. During address assignment, DHCP checks for conflicts
using ping and gratuitous Address Resolution Protocol (ARP). If a
conflict is detected, the address is removed from the pool. The address
will not be assigned until the administrator resolves the conflict.</span></blockquote><div><br></div><div>Yes it does.</div><br><div>
<div style="font-family: Helvetica; ">-Ryan</div>
</div>
<br><div><div>On May 9, 2011, at 2:47 PM, Lelio Fulgenzi wrote:</div><br class="Apple-interchange-newline"><span class="Apple-style-span" style="border-collapse: separate; font-family: 'Lucida Grande'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div><div style="font-family: Verdana; font-size: 10pt; color: rgb(0, 0, 0); ">thanks Ryan.<br><br>I'm looking through the on-line documentation now, I'll have to pay attention to that chapter.<br><br>do you know off-hand if the IOS dhcp server does a ping before assignment?<br><span><br><span name="x"></span>---<br>Lelio Fulgenzi, B.A.<br>Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1<br>(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)<br>^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^<br>Cooking with unix is easy. You just sed it and forget it.<span class="Apple-converted-space"> </span><br> - LFJ (with apologies to Mr. Popeil)<br><span name="x"></span><br></span><br><hr id="zwchr"><b>From:<span class="Apple-converted-space"> </span></b>"Ryan Ratliff" <<a href="mailto:rratliff@cisco.com">rratliff@cisco.com</a>><br><b>To:<span class="Apple-converted-space"> </span></b>"Lelio Fulgenzi" <<a href="mailto:lelio@uoguelph.ca">lelio@uoguelph.ca</a>><br><b>Cc:<span class="Apple-converted-space"> </span></b>"cisco-voip (<a href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a>)" <<a href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a>><br><b>Sent:<span class="Apple-converted-space"> </span></b>Monday, May 9, 2011 2:37:30 PM<br><b>Subject:<span class="Apple-converted-space"> </span></b>Re: [cisco-voip] suggested/best practices for DHCP settings on routers<br><br>Look into the dhcp database configuration so you can keep your bindings on reload.<div><a href="http://www.cisco.com/en/US/docs/ios/ipaddr/configuration/guide/iad_dhcp_svr_cfg.html#wp1061906" target="_blank">http://www.cisco.com/en/US/docs/ios/ipaddr/configuration/guide/iad_dhcp_svr_cfg.html#wp1061906</a></div><div><br><div><div style="font-family: Helvetica; ">-Ryan</div></div><br><div><div>On May 9, 2011, at 2:25 PM, Lelio Fulgenzi wrote:</div><br class="Apple-interchange-newline"><span class="Apple-style-span" style="border-collapse: separate; font-family: 'Lucida Grande'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; font-size: medium; "><div><div style="font-family: Verdana; font-size: 10pt; color: rgb(0, 0, 0); ">For our two remote campuses, I'm running DHCP for the phones on the local router rather than using our central DHCP server. This is causing us a few problems, namely when we reboot the router.<br><br>When we reboot the router, DHCP all bindings are lost, so when a phone is going through it's DHCP lifecycle, it's getting a different IP address and causing phones to reboot due to IP address conflicts.<br><br>I also just found out that I can't ping the phones from the router from the command line, so I'm guessing any ping before binding is failing, but I'm not sure the router does a ping before a bind.<br><br>'m leaning towards using the on-campus DHCP service, but am worried that in an extended down time the phones will crap out, especially during any sort of power cycle.<br><br>Anyone have any suggestions? I'm going to take a read through the online docs for v15 to see if there is anything available.<br><br><span><br><span></span>---<br>Lelio Fulgenzi, B.A.<br>Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1<br>(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)<br>^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^<br>Cooking with unix is easy. You just sed it and forget it.<span class="Apple-converted-space"> </span><br> - LFJ (with apologies to Mr. Popeil)<br><span></span><br></span><br></div>_______________________________________________<br>cisco-voip mailing list<br><a href="mailto:cisco-voip@puck.nether.net" target="_blank">cisco-voip@puck.nether.net</a><br><a href="https://puck.nether.net/mailman/listinfo/cisco-voip" target="_blank">https://puck.nether.net/mailman/listinfo/cisco-voip</a><br></div></span></div><br></div></div></div></span><br class="Apple-interchange-newline"></div><br></body></html>