Allied Telesis AT 9924SP AT-9924SP-30 AT-9924SP-30 Software Manual page 18

Configure epsr (ethernet protection switching ring) to protect a ring from loops

2. Configure the transit node (switch B) that belongs just to the EPSR domain

This transit node (B) is the same as in the previous example.

create vlan=vlan1000 vid=1000

add vlan=1000 port=1-2 frame=tagged

create vlan=vlan2 vid=2

add vlan=2 port=1-2 frame=tagged

delete vlan=1 port=1-2

create epsr=domain1 mode=transit controlvlan=vlan1000

add epsr=domain1 datavlan=vlan2

enable epsr=domain1

3. Configure the switches that belong to the RSTP instance (switches C and D)

Switches C and D have the same configuration in this example.

Configure the STP VLAN:

create vlan=vlan10 vid=10

add vlan=10 port=10-11 frame=tagged

Remove the STP VLAN's ports from the default VLAN:

delete vlan=1 port=10-11

Configure STP:

create stp=example

add stp=example vlan=vlan10

enable stp=example

set stp=example mode=rapid

Page 18 | AlliedWare™ OS How To Note: EPSR

Example 3: EPSR and RSTP