Allied Telesis AT-S39 - Manual (Page 141)

AT-S39 User’s Guide
141
However, the more ports you mirror, the less likely the mirroring
port will be able to handle all the traffic. For example, if you mirror
the traffic of six heavily active ports, the mirror port is likely to
drop packets, meaning that it will not provide an accurate mirror
of the traffic of the other six ports.
❑ The ports to be mirrored and the mirroring port must be located
on the same switch.
❑ The ports to be mirrored and the mirroring port must be
operating at the same speed. For example, you cannot use a
10/100 Mbps port to mirror traffic on a 1000 Mbps GBIC port.
Note
In most cases, this parameter should be left with its default value of
0. A value of 0 means that the VLAN traffic will not be mirrored. For
more information on port mirroring, refer to Port Mirroring
Overview on page 93.
9. Type C to select Create VLAN.
If the switch is successful in creating the new VLAN, you will see the
following message:
SUCCESS - Press any key to continue.
10. Press any key.
The Configure VLANS menu in Figure 37 is displayed.
11. Type S to select Save Configuration Changes.
12. Press Esc or type R to return to the Configure VLANS menu. If you
would like to verify that the VLAN was created correctly, complete
steps 13 through 14. Otherwise, you can repeat this procedure to
create additional VLANs.
13. type 7 to select Show VLANs.
14. Check to see that the VLAN was created correctly and that it contains
the appropriate ports.
Note
When you create a new VLAN, ports designated as untagged ports
of the new VLAN are automatically removed from their current
untagged VLAN assignment. For example, if you are creating a new
VLAN on a switch that contains only the Default_VLAN, the ports
that you specify as untagged ports of the new VLAN are
automatically removed from the Default_VLAN.
Tagged ports are not removed from any current VLAN assignments
because tagged ports can belong to more than one VLAN at a time.