Web Management
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suppose that the end-host logs off or powers 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 agin
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
The table has one row for each port
g.
on the selected switch in the stack and a number of columns,
which are:
Port
The port number to which the configuration below applies.
Mode
this and the Global Mode must be set to
d for Limit Control to be in effect. Notice that other modules may still use the underlying port
Controls whether Limit Control is enabled on this port. Both
Enable
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
1024. If the limit is exceeded, the corresponding action is taken.
ew
w from the same pool, it
exceed
The stack is "born" with a total number of MAC addresses from which all ports draw whenever a n
MAC address is seen on a Port Security-enabled port. Since all ports dra
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:
ne:
Do not allow more than Limit MAC addresses on the port, but take no further action.
NMP trap. If Aging is disabled,
l be removed from the port, and no new address will be learned.
),
e port, both the "Trap" and the
No
Trap:
If Limit + 1 MAC addresses is seen on the port, send an S
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 wil
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 stack or elect a new master,
2. Disable and re-enable Limit Control on the port or the stack,
3. Click the Reopen button.
Trap & Shutdown:
If Limit + 1 MAC addresses is seen on th
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