Technical information

AX Series L2 Loop Detection Configuration Guide (Edition 2)

The following figure shows an example of a node of an access switch where the L2 loop detection functionality

is set.

IP address of Switch

192.168.10.1

(VLAN 10)

Figure 2.1-2 Example of an access switch configuration

Ports 0/1 and 0/2 and Rapid PVST+ are used for connection with the upstream network.

For the endpoint side, where terminals and hubs are connected, ports 0/5 to 0/24 are used. Among those ports,

ports 0/5 and 0/6 are used by VLAN 10, ports 0/7 and 0/8 are by VLAN 11, and ports 0/9 to 0/23 are by VLAN 12.

Ports 0/9 to 0/23 are currently not connected to any devices, but might be connected to devices such as terminals or

hubs temporarily or in the future. Port 0/24 is used as a trunk port of VLANs 10 to 12.

Ports 0/3 and 0/4 are currently empty and no devices are to be connected in the meantime.

The status of this network system is monitored with SNMP, and L2 loop detection is also reported to the SNMP

manager.

Important points on constructing a system and configuration examples for the above-mentioned usage are shown

below.

E1: AX2430S-24T

(Option)

Upstream network o

STP (Rapid PVST+)

AX-NU (L2 loop

monitoring tool)

192.168.100.100

SNMP manager

192.168.100.200 public

Empty (not

to be added)

L2 loop detection

uplink setting

0/2

0/1

0/4

VLANs

0/24

VLAN 12

10-12

VLAN 11

VLAN 10

...

0/23

0/8 0/90/70/6 0/5

0/3

L2 loop detection

and blocking setting

Empty (to be added)