CCNA Voice Tutorial - DHCP and also the IP Phone Boot Process

Just since our own goes along with routers have certain lab tests as well as processes they run if they boot, and so do Cisco IP Phones - however with course, there exists an important change and also two among the actual Phone as well as router kick out processes! Here's that simple boot surgery for any Cisco IP Phone: As you'd expect, the first thing could be to physically hook up your Phone with a swap port. The Phone can easily receive it has the strength by way of Power Over Ethernet (PoE) that the Phone and Switch agree on the actual PoE solution to be used. Originally referred to as "inline power", PoE enables the ability for being sent through the photographer conductor on the related device. Our previous buddy Cisco Discovery Protocol goes in the actual picture now, while its CDP in which informs the Phone what Voice VLAN that will use. Be certain CDP is actually jogging on the particular transition dock that is attached to the particular IP Phone, as it's commonplace to disable CDP. The Phone at this point wants an IP handle - following all, a great IP Phone are not a lot fine devoid of one! That address and various related info can be procured with considerably similar means a new "regular" host system really does hence - by using DHCP. The IP Phone directs your DHCP Request, that is forwarded because of the router towards DHCP Server. That forwarding required this router to get designed using the ip helper-address command; routers tend not to ahead broadcasts simply by default. From there, the procedure can be incredibly similar your PC acquiring an IP address - this DHCP server takes action with the common Offer, as well as the Phone accepts your first Offer it receives. This procedure is just not exactly like your PC requesting an correct via DHCP, though. With IP Phones, there may be some extra method in DHCP - Option 150, for you to become exact. This Option explains that IP Phone where to obtain the TFTP Server that retains this Phone's configuration record as well as being a major portion of IP Phone operation. The Phone after that acquaintances of which TFTP equipment after which you can downloads its configuration file. google_ad_client = "pub-2311940475806896"; /* 300x250, produced 1/6/11 */ google_ad_slot = "0098904308"; google_ad_width = 300; google_ad_height = 250; From the particular details associated with that config file, the Phone discovers that location on the call processing providers it need to use, after which you can ones to make contact with all of them throughout the particular purchase where they're classified by the actual file. If that you're making a Cisco router when a DHCP Server, you'll want to make it possible for Option 150 - as well as I'll demonstrate you merely the way to try and do that in the following CCNA Voice tutorial with this string along with by way of a movie available by means of your favorite training video sharing site!

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