Port - ZyXEL Communications RGS Series User Manual

5.4.18 Port

This page shows 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.
Object
MAC Address & VLAN ID
State
Time of Addition
Age/Hold
The MAC address and VLAN ID that is seen on this port. If no MAC addresses are
learned, a single row stating "No MAC addresses attached" is displayed.
Indicates whether the corresponding MAC address is blocked or forwarding. In the
blocked state, it will not be allowed to transmit or receive traffic.
Shows the date and time when this MAC address was first seen on the port.
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.
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Description
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