C
HAPTER
16
| IEEE 802.1X Commands
– 269 –
D
EFAULT
S
ETTING
Allows all new clients.
C
OMMAND
U
SAGE
The switch has a fixed pool of state-machines, from which all ports draw
whenever a new client is seen on the port. When a given port's maximum
is reached (counting both authorized and unauthorized clients), further
new clients are disallowed access. Since all ports draw from the same pool,
it may happen that a configured maximum cannot be granted, if the
remaining ports have already used all available state-machines.
E
XAMPLE
Dot1x>clients 9 10
Dot1x>
dot1x agetime
This command displays or sets the time between checking for activity on
successfully authenticated MAC addresses.
S
YNTAX
dot1x agetime
[
age-time
]
age-time
- The period used to calculate when to age out a client
allowed access to the switch through MAC-based authentication as
described below. (Range: 10-1000000 seconds)
D
EFAULT
S
ETTING
300 seconds
C
OMMAND
U
SAGE
Suppose a client is connected to a 3rd party switch or hub, which in turn is
connected to a port on this switch that is running MAC-based
authentication, and suppose the client gets successfully authenticated.
Now assume that the client powers down his PC. What should make the
switch forget about the authenticated client? Reauthentication will not
solve this problem, since this doesn't require the client to be present, as
discussed under Reauthentication Enabled above. The solution is aging out
authenticated clients.
A timer is started when the client gets authenticated. After half the age
period, the switch starts looking for frames sent by the client. If another
half age period elapses and no frames are seen, the client is considered
removed from the system, and it will have to authenticate again the next
time a frame is seen from it. If, on the other hand, the client transmits a
frame before the second half of the age period expires, the switch will
consider the client alive, and leave it authenticated. Therefore, an age
period of T will require the client to send frames more frequent than T/2 to
stay authenticated.
Summary of Contents for 8028L2
Page 1: ...MANAGEMENT GUIDE TigerSwitchTM 10 100 1000 28 Port Gigabit Ethernet Switch SMC8028L2 ...
Page 6: ...ABOUT THIS GUIDE 6 ...
Page 22: ...FIGURES 22 ...
Page 26: ...SECTION Getting Started 26 ...
Page 46: ...CHAPTER 2 Initial Switch Configuration Managing System Files 46 ...
Page 48: ...SECTION Web Configuration 48 ...
Page 144: ...CHAPTER 4 Configuring the Switch Configuring DHCP Relay and Option 82 Information 144 ...
Page 184: ...CHAPTER 6 Performing Basic Diagnostics Running Cable Diagnostics 184 ...
Page 238: ...CHAPTER 12 Port Commands 238 ...
Page 244: ...CHAPTER 13 Link Aggregation Commands 244 ...
Page 262: ...CHAPTER 15 RSTP Commands 262 ...
Page 272: ...CHAPTER 16 IEEE 802 1X Commands 272 ...
Page 282: ...CHAPTER 17 IGMP Commands 282 ...
Page 290: ...CHAPTER 18 LLDP Commands 290 ...
Page 296: ...CHAPTER 19 MAC Commands 296 ...
Page 306: ...CHAPTER 21 PVLAN Commands 306 ...
Page 318: ...CHAPTER 22 QoS Commands 318 ...
Page 352: ...CHAPTER 26 SNMP Commands 352 ...
Page 355: ...CHAPTER 27 HTTPS Commands 355 EXAMPLE HTTPS redirect enable HTTPS ...
Page 356: ...CHAPTER 27 HTTPS Commands 356 ...
Page 362: ...CHAPTER 29 UPnP Commands 362 ...
Page 370: ...CHAPTER 31 Firmware Commands 370 ...
Page 372: ...SECTION Appendices 372 ...
Page 386: ...GLOSSARY 386 ...
Page 391: ...INDEX 391 ...
Page 392: ...149100000079A R01 SMC8028L2 ...