62
down. If it wasn't for aging, the end-host would still take up resources on this switch
and will be allowed to forward. To overcome this situation, enable aging. With aging
enabled, a timer is started once the end-host gets secured. When the timer expires,
the switch starts looking for frames from the end-host, and if such frames are not seen
within the next Aging Period, the end-host is assumed to be disconnected, and the
corresponding resources are freed on the switch.
Port Configuration
Port
The port number to which the configuration below applies.
Mode
Controls whether Limit Control is enabled on this port. Both this and the
Global Mode
must be set to Enabled for Limit Control to be in effect. Notice that other modules may
still use the underlying port security features without enabling Limit Control on a given
port.
Limit
The maximum number of MAC addresses that can be secured on this port. This
number cannot exceed 1024. If the limit is exceeded, the corresponding
action
is
taken.
The switch is "born" with a total number of MAC addresses from which all ports draw
whenever a new MAC address is seen on a Port Security-enabled port. 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 MAC addresses.
Action
If
Limit
is reached, the switch can take one of the following actions:
None
: Do not allow more than
Limit
MAC addresses on the port, but take no further
action.
Trap
: If
Limit
+ 1 MAC addresses is seen on the port, send an SNMP trap. If Aging is
disabled, only one SNMP trap will be sent, but with Aging enabled, new SNMP traps
will be sent every time the limit gets exceeded.
Shutdown
: If
Limit
+ 1 MAC addresses is seen on the port, shut down the port. This
implies that all secured MAC addresses will be removed from the port, and no new
address will be learned. Even if the link is physically disconnected and reconnected
on the port (by disconnecting the cable), the port will remain shut down. There are
three ways to re-open the port:
1) Boot the switch,
2) Disable and re-enable Limit Control on the port or the switch,
3) Click the
Reopen
button.
Trap & Shutdown
: If
Limit
+ 1 MAC addresses is seen on the port, both the "Trap"
and the "Shutdown" actions described above will be taken.
State
This column shows the current state of the port as seen from the Limit Control's point
of view. The state takes one of four values:
Summary of Contents for FSM-510G series
Page 14: ...14 2 2 2 Monitor Menu...
Page 15: ...Command Descriptions 15 2 2 3 Diagnostics Menu 2 2 4 Maintenance Menu...
Page 26: ...26 2 3 9 Port...
Page 96: ...96 Updates the table starting with the entry after the last entry currently displayed...
Page 164: ...164 Click to undo any changes made locally and revert to previously saved values...
Page 186: ...186 Click to undo any changes made locally and revert to previously saved values...
Page 201: ...Command Descriptions 201 Click to refresh the page...
Page 202: ...202 2 4 14 Detailed Statistics...
Page 204: ...204 Check this box to refresh the page automatically Automatic refresh occurs every 3 seconds...
Page 212: ...212 Click to refresh the page immediately Clear all statistics...
Page 214: ...214 Refreshes the displayed table starting from the input fields Flushes all dynamic entries...
Page 220: ...220 Click to refresh the page immediately...
Page 248: ...248 Updates the table starting with the entry after the last entry currently displayed...
Page 254: ...254 Updates the table starting with the entry after the last entry currently displayed...
Page 260: ...260 Updates the table starting with the entry after the last entry currently displayed...