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Overview of Cisco Cius

and also security in the system. The following table provides information about changes to call security levels

when Barge is used.

Table 10: Call Security Interactions When Barge Is Used

Initiator device

security level

Nonsecure

Secure

The following table provides information about changes to conference security levels depending on the initiator

device security level, the security levels of participants, and the availability of secure conference bridges.

Table 11: Security Restrictions With Conference Calls

Initiator device

security level

Nonsecure

Secure

Supporting 802.1X Authentication on Cisco Cius

These sections provide information about 802.1X support on Cisco Cius:

•

Overview

Cisco Cius and Cisco Catalyst switches traditionally use Cisco Discovery Protocol (CDP) to identify each

other and determine parameters such as VLAN allocation and inline power requirements. Cisco Cius also

uses CDP; however, CDP does not identify any locally attached PCs; therefore, an EAPOL pass-through

mechanism is used, whereby a PC that is attached locally to Cisco Cius may pass EAPOL messages to the

OL-26938-01

Feature used

Barge

Feature used

Conference

Overview, on page 19

Required Network Components, on page 20

Requirements and Recommendations, on page 20

Supporting 802.1X Authentication on Cisco Cius

Call security level

Results of action

Encrypted call

Call barged and identified as nonsecure

call

Encrypted call

Call barged and identified as secure call

Security level of

Results of action

participants

Secure

Nonsecure conference bridge

Nonsecure conference

At least one member

Secure conference bridge

is nonsecure

Nonsecure conference

Secure

Secure conference bridge

Secure encrypted level conference

Cisco Cius Administration Guide, Release 9.2(3)