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Lantronix
SM24TBT2DPA and SM24TBT2DPB Web User Guide
3-5.2.1.2 Port
This page displays the MAC addresses secured by the Port Security module. Port Security is a module
with no direct configuration. Configuration comes indirectly from other modules - the user modules. When
a user module has enabled port security on a port, the port is set-up for software-based learning. In this
mode, frames from unknown MAC addresses are passed on to the port security module, which in turn
asks all user modules whether to allow this new MAC address to forward or block it. For a MAC address to
be set in the forwarding state, all enabled user modules must unanimously agree on allowing the MAC
address to forward. If only one chooses to block it, it will be blocked until that user module decides
otherwise.
To view Port Security Port Status in the web UI:
1. Click Monitor, Security, Network, Port Security, Port.
2. Specify the Port which you want to monitor.
3. Check “Auto-refresh” or click “Refresh” to refresh the port detailed statistics.
Figure 3-5.2.1.2: Port Security Port Status page
Parameter descriptions:
MAC Address & VLAN ID:
The MAC address and VLAN ID seen on this port. If no MAC addresses are
learned, a single row stating "
No MAC addresses attached
" displays.
State:
Indicates whether the corresponding MAC address is
B
locked or
F
orwarding. In the blocked state,
it will not be allowed to transmit or receive traffic.
Time of Addition:
Shows the date and time when this MAC address was first seen on the port.
Age/Hold:
If at least one user module has decided to block this MAC address, it will stay in the blocked
state until the hold time (measured in seconds) expires. If all user modules have decided to allow this
MAC address to forward, and aging is enabled, the Port Security module will periodically check that this
MAC address still forwards traffic. If the age period (measured in seconds) expires and no frames have
been seen, the MAC address will be removed from the MAC table. Otherwise, a new age period will begin.
If aging is disabled or a user module has decided to hold the MAC address indefinitely, a dash (-) will be
shown.
Buttons
Auto-refresh:
Check this box to refresh the page automatically every 3 seconds.
Refresh
: Click to refresh the page immediately.
Clear
: Use the port select box to select which port to show status for.