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42C4911, January 2007 67
CHAPTER 2
Port-based Network Access Control
Port-Based Network Access control provides a means of authenticating and authorizing
devices attached to a LAN port that has point-to-point connection characteristics. It prevents
access to ports that fail authentication and authorization. This feature provides security to ports
of the GbESM that connect to blade servers.
The following topics are discussed in this section:
“Extensible Authentication Protocol over LAN” on page 68
“802.1x Authentication Process” on page 69
“802.1x Port States” on page 71
“Supported RADIUS Attributes” on page 72
“Configuration Guidelines” on page 73