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802.1X | 107
7
802.1X
802.1X is supported on platforms: c e s
This chapter has the following sections:
• Protocol Overview on page 107
• Configuring 802.1X on page 111
• Important Points to Remember on page 112
• Enabling 802.1X on page 112
• Configuring Request Identity Re-transmissions on page 114
• Forcibly Authorizing or Unauthorizing a Port on page 115
• Re-Authenticating a Port on page 116
• Configuring Timeouts on page 117
• Dynamic VLAN Assignment with Port Authentication on page 119
• Guest and Authentication-Fail VLANs on page 121
• Multi-Host Authentication on page 123
• Multi-Supplicant Authentication on page 125
• MAC Authentication Bypass on page 127
• Dynamic CoS with 802.1X on page 130
Protocol Overview
802.1X is a method of port security. A device connected to a port that is enabled with 802.1X is disallowed
from sending or receiving traffic on the network until its identity can be verified (through a username and
password, for example); all ingress frames, except those used for 802.1X authentication, are dropped. This
feature is named for its IEEE specification.