Cisco CCNA Voice Exam Cram: Configuring the Network to Support Vo. IP | Understanding the Theory of Voice VLANs. This chapter describes the typical boot process for Cisco IP phones and indicates the best practices related to configuring the network to support Voice over IP (Vo. IP). This chapter is from the book To deploy Cisco Unified Communications Manager Express, network services need to be established and properly configured on all routers and switches for Cisco IP phones to function. The Cisco Call Manager Express (CME) software (its new name is Cisco Unified Communications Manager Express) provides IP Telephony services that run on Cisco. This chapter describes the typical boot process for Cisco IP phones and indicates the best practices related to configuring the network to support Voice over IP (Vo. IP). A Cisco IP phone can act as a three- port switch. Just like a switch, the phone can support 8. Q frames between itself and another switch, and more than one VLAN can be supported between the Cisco Unified IP phone and an access switch. Figure 7. 1 illustrates how the Cisco IP phone acts as a three- port switch. Figure 7. 1 Cisco IP phones include a three- port switch.
![]() The following are the three ports of the Cisco IP phone: The external port that connects to a 1. Canon Pixma Mp 140 Reset Software here. Ethernet switch. The external 1. Ethernet port for PC connections. An internal 1. 0/1. Ethernet port for Vo. IP traffic. The benefits of this type of configuration include the following: Cisco IP phones can be deployed on the network without IP address scalability problems. IP subnets usually have more than 5. IP addresses allocated. Air Moon Safari Torrent Flac Arena . A separate VLAN and its separate IP subnet to carry the voice traffic allow a large number of new devices, such as IP phones, to be introduced into the network without extensive modifications to the existing IP address scheme.Voice and data VLANs allow the logical separation of data and voice traffic due to different characteristics.This separation allows you to handle each traffic type individually, applying different quality of service (Qo.S) policies to each VLAN for monitoring and managing them separately. The following are IP addressing recommendations when adding Cisco IP phones to an existing data network: Continue to use existing addressing for data devices (PCs, workstations, and so on). Add Cisco IP phones and use DHCP to provision IP addresses and operating parameters. Use new subnets for Cisco IP phones if they are available in the existing address space, or use private addressing such as the 1. RFC 1. 91. 8 for details) if subnets are not available in the existing address space. With IP phones residing in a separate VLAN—a voice VLAN—it is easier for you to automate the process of deploying IP phones. The IP phone communicates with the switch, using the Cisco Discovery Protocol (CDP), to request the voice VLAN if present. The switch CDP response provides the phone with the appropriate 8. Q VLAN ID, known as the voice VLAN ID (VVID). The PC traffic travels across the same connection without the 8.
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