Comtrol RocketLinx MP1204-XT, Руководство пользователя

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RocketLinx MP1204-XT User Guide : 2000644 Rev. A Monitor Pages - 203
Security | Network | Port Security | Port
Security | Network | Port Security | 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 is blocked until that user module decides otherwise.
Item Monitor | Security | Network | Port Security | Port
MAC
Address &
VLAN ID
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.
State
Indicates whether the corresponding MAC address is blocked or forwarding. In
the blocked state, it is not 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 stays 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 periodically checks that this MAC address
still forwards traffic. If the age period (measured in seconds) expires and no
frames have been seen, the MAC address is removed from the MAC table.
Otherwise a new age period begins.
If aging is disabled or a user module has decided to hold the MAC address
indefinitely, a dash (-) is shown.