User`s guide
AT-S25 Management Software User’s Guide
69
❑ The MAC address aging time is disabled under this security level.
Once a dynamic MAC address has been learned on a port and
added to a MAC Address Table, it remains in the table and is not
purged unless one member of the group experiences a link down
condition or the switch is power cycled.
❑ Static MAC addresses are retained and are not included in the
count of maximum addresses that can be learned by a port group.
You can continue to add static MAC addresses to a port even if the
group in which the port is a member has already learned its
maximum number of dynamic MAC addresses.
Port Groupings
As noted earlier, a maximum limit of MAC addresses applies to a port
group. It cannot be set on a per port basis, except for some optional
uplink ports. Different port groups on a switch can have different
maximum limits.
Port groupings differ depending on the switch model. An AT-8324
Switch has five port groups, as illustrated in Figure 19.
Figure 19 Port Groupings on an AT-8324 Switch
The AT-8316F/MT and AT-8316F/VF switches have four groups, as shown
in Figure 20.
Figure 20 Port Groups on an AT-8316F/MT or AT-8316/VF Switch
Group 1
Group 2
Group 3
Ports 1 to 8
Ports 9 to 16
Ports 17 to 24
STATUS
RESET
FAULT
MASTER
RPS
PWR
10BASE-T / 100BASE-TX
FAST ETHERNET SWITCH
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
10BASE-T / 100BASE-TX
1X 3X 5X 7X
2X 4X 6X 8X
9X 11X 13X 15X
10X 12X 14X 16X
17X 19X 21X 23X
18X 20X 22X 24X
A
B
RS-232
TERMINAL PORT
100M LINK / ACTIVITY 10M LINK / ACTIVITY
HALF DUP/
COL
FULL DUP
PORT ACTIVITY
L/A
L/A
D/C
D/C
L/A
D/C
Group 4
Group 5
Group 1
Group 2
Ports 1 to 8
Ports 9 to 16
100BASE-FX FAST ETHERNET SWITCH
STATUS
RESET
FAULT
MASTER
RPS
PWR
100BASE-FX
A
B
RS-232
TERMINAL PORT
PORT ACTIVITY
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
L/A
D/C
L/A
D/C
L/A
D/C
L/A
D/C
L/A
D/C
L/A
D/C
L/A
D/C
L/A
D/C
L/A
D/C
L/A
D/C
L/A
D/C
L/A
D/C
L/A
D/C
L/A
D/C
L/A
D/C
L/A
D/C
ACTIVITY
FULL DUP
100M LINK
HALF DUP/ COL
L/A
D/C
Group 3
Group 4