We recently had a problem where the phones had a problem receiving a DHCP address from the DC. We set up option 150 and the extra scope and the voice VLAN, but for whatever reason the phones would only get the VLAN ID, but refuse to get an IP address. Some phone get incorrect information, such as bad CM IP information. The only way to configure the phone was to give it a static address, default gateway, and TFTP server, and it would pull the new image down, reload, and register just fine. From there we can set it back to DHCP and the phone will be fine.
Any ideas as to what could have caused this. It happened to each phone (about 80).
Thanks for the information, that will probably do the trick, but referring to the document, our phones never received an error, they just sit around looking for an IP address. Were you getting an error, or no?
The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...
This document describe how DST changes and how time changes are
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setting the clocks forward 1 hour from standard time during the summer
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