Supporting 802.1X Authentication On Cisco Unified Ip Phones; Overview - Cisco 7906G Administration Manual

Chapter 1 An Overview of the Cisco Unified IP Phone
Note

Supporting 802.1X Authentication on Cisco Unified IP Phones

Overview

Cisco Unified IP Phone 7906G and 7911G Administration Guide for Cisco Unified CallManager 5.1
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security, providing integrity and privacy to the call. When a call in progress is
being encrypted, the call progress icon to the right of the call duration timer in the
phone LCD screen changes to the following icon:
If the call is routed through a non-IP call leg, for example, PSTN, the call will be
nonsecure even though it is encrypted within the IP network and has a lock icon
associated with it.
Related Topic
Understanding Security Features for Cisco Unified IP Phones, page 1-12
•
Supporting 802.1X Authentication on Cisco Unified IP Phones, page 1-19
•
Security Restrictions, page 1-22
•
These sections provide information about 802.1X support on the Cisco Unified IP
Phones:
Overview, page 1-19
•
Required Network Components, page 1-20
•
• Best Practices—Requirements and Recommendations, page 1-20
Cisco Unified IP phones and Cisco Catalyst switches have traditionally used
Cisco Discovery Protocol (CDP) to identify each other and to determine
parameters such as VLAN allocation and inline power requirements. However,
CDP is not used to identify any locally attached PCs. Therefore, Cisco Unified IP
Phones provide an EAPOL pass-through mechanism, whereby a PC locally
attached to the IP phone may pass through EAPOL messages to the 802.1X
Understanding Security Features for Cisco Unified IP Phones
1-19