<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">I'd agree with both Justin and David. People use /24s for their voice vlans all the time and never run into arp cache issues on the phones. <div><br></div><div>You need to get a packet capture to see what is really happening. If your CUCM is really on a different subnet than the phone then the arp cache entry for the default gateway (that let's the phone stay registered with CUCM) will be the same one needed for the phone to respond to a ping from the same router. </div><div><br><div apple-content-edited="true">
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; 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; ">-Ryan</span>
</div>
<br><div><div>On Oct 9, 2012, at 4:21 AM, David Sullivan <<a href="mailto:David.Sullivan@barnetsouthgate.ac.uk">David.Sullivan@barnetsouthgate.ac.uk</a>> wrote:</div><br class="Apple-interchange-newline"><div>I have seen this issue and it was related to the mac address table timeout being shorter than the arp timeout, on switches I normally match the two with:<br><br>mac address-table aging-time 14400<br><br>This timeout being far easier to change than changing the arp settings on every device, the re-arp will then refresh the mac address table.<br><br>David.<br><br>* Barnet and Southgate College is a highly successful Further Education college with around 21,000 students of all ages from 14 years upwards. <br><br>* The College occupies four main campuses: Grahame Park at Colindale, Southgate, Edmonton Green and the brand new town centre campus at Wood St, High Barnet. <br><br>_____________________________________________________________________________<br>This communication may contain privileged or confidential information which is for the exclusive use of the intended recipient. If you are not the intended recipient, please note that you may not distribute or use this communication or the information it contains. If this e-mail has reached you in error, please delete it and any attachment.<br><br>Internet communications are not secure and Barnet and Southgate College does not accept legal responsibility for the content of this message. Any views or opinions expressed are those of the author and not necessarily those of Barnet and Southgate College.<br><br>Please note that Barnet and Southgate College reserves the right to monitor the source/destinations of all incoming or outgoing e-mail communications.<br>_____________________________________________________________________________<br><br><br>_______________________________________________<br>cisco-voip mailing list<br><a href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a><br>https://puck.nether.net/mailman/listinfo/cisco-voip<br><br></div></div><br></div></body></html>