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13 Cards in this Set
- Front
- Back
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What DHCP Option is used to provide the phones with a list of TFTP Servers |
Option 150 |
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Name three different DHCP Server Options |
Third Party such as Microsoft DHCP, Cisco IOS DHCP Server, CUCM DHCP Server |
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When using a third party DHCP server what is commonly required to relay DHCP request to the server |
DHCP relay server, a switch can provide DHCP relay services using the ip-helper command |
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When does a phone request a new IP Address |
Exactly half the lease time set on the DHCP Server. If the DHCP has a lease period of 8hrs the phones will request a new address at 4hrs. |
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Is TFTP a critical part of the UC solution |
YES |
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What is the method by which phones receive firmware and configuration information? |
TFTP |
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The CUCM TFTP Server contains files for phones, gateways and other endpoints. Name some of the files provided by the CUCM TFTP Server. |
Phone firmware files Phone configuration files Certificate Trust List (CTL) files Identity Trust List (ITL) files Tone localization files Ring list files Softkey and Phone Button template files Background Images |
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List some of the TFTP Applications
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CUCM TFTP Supports TFTP Proxy Load Server option Peer firmware sharing |
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What common attributes must phones have for peer firmware sharing to work properly? |
Phones must be on the same subnet Phones must be the same type |
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What happens if peer firmware sharing fails |
If peer firmware sharing fails, phones will fall back to CUCM TFTP for the phone firmware
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What is the order of operations for phone TFTP interaction? |
1.)Phone receives DHCP info with option 150 supplying an ordered list of TFTP servers 2.)The phone contacts the TFTP server to request firmware and configuration 3.)TFTP server sends configuration information 4.) Info contains CUCM registration server information 5.)XML Configuration file is downloaded if available, otherwise the default file is used. 6.) Phone downloads remaining information such as Softphone template, phone button template 7.) The phone registers with the first cucm server is the provided list |
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What does the configuration file contain? |
Firmware load information, and cucm registration information |
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Does the phone or the CUCM decide if the phone should upgrade firmware? |
The decision is made by the phone on whether to upgrade based on the config file info |
