Planet XGS3-42000R User Manual page 555

The above topology is the typical application environment which is used by ULSM and ULPP protocol.
ULSM is used to process the port state synchronization, its independent running is useless, so it usually
associates with ULPP protocol to use. In the topology, SwitchA enables ULPP protocol, it is used to switch the
uplink. SwitchB and S witchC enable ULSM protocol to monitor whether the uplink is down. If it is down, then
ULSM will execut e the down operation for the downlink port to shutdown it, so ULPP protocol of S wtich A
executes the relative operation of the uplink switchover.
SwitchA configuration task list:
XGS 3-42000R(config)#spanning-tree mst configuration
XGS 3-42000R(config-Mstp-Region)#instance 1 vlan 1
XGS 3-42000R(config-Mstp-Region)#exit
XGS 3-42000R(config)#ulpp group 1
XGS 3-42000R(ulpp-group-1)#protect vlan-reference-instance 1
XGS 3-42000R(ulpp-group-1)#exit
XGS 3-42000R(config)#interface ethernet 1/1
XGS 3-42000R(config-If-Ethernet1/1)# ulpp group 1 master
XGS 3-42000R(config-If-Ethernet1/1)#exit
XGS 3-42000R(config)#interface Ethernet 1/2
XGS 3-42000R(config-If-Ethernet1/2)# ulpp group 1 slave
XGS 3-42000R(config-If-Ethernet1/2)#exit
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