User's Manual

67-7
ULPP can implement the VLAN-based load balance. As the picture illustrated, SwitchA configures two ULPP
groups: port E1/0/1 is the master port and port 1/0/2 is the slave port in group1, port 1/0/2 is the master port
and port 1/0/1 is the slave port in group2. The VLANs protected by group1 are 1-100 and by group2 are
101-200. Here both port E1/0/1 and port E1/0/2 at the forwarding state, the master port and the slave port
mutually backup, respectively forward the packets of different VLAN ranges. When port E1/0/1 has the
problem, the traffic of VLAN 1-200 are forwarded by port E1/0/2. When port E1/0/1 is recovering the normal
state, still port E1/0/2 forwards the data of VLAN 101-200, the data of VLAN 1-100 are switched to port E1/0/1
to forward.
SwitchA configuration task list:
Switch(Config)#spanning-tree mst configuration
Switch(Config-Mstp-Region)#instance 1 vlan 1-100
Switch(Config-Mstp-Region)#instance 2 vlan 101-200
Switch(Config-Mstp-Region)#exit
Switch(Config)#ulpp group 1
Switch(ulpp-group-1)#protect vlan-reference-instance 1
Switch(ulpp-group-1)#preemption mode
Switch(ulpp-group-1)#exit
Switch(Config)#ulpp group 2
Switch(ulpp-group-2)#protect vlan-reference-instance 2
Switch(ulpp-group-1)#preemption mode
Switch(ulpp-group-2)#exit
Switch(Config)#interface ethernet 1/0/1
Switch(config-If-Ethernet1/0/1)#switchport mode trunk
Switch(config-If-Ethernet1/0/1)#ulpp group 1 master
Switch(config-If-Ethernet1/0/1)#ulpp group 2 slave
Switch(config-If-Ethernet1/0/1)#exit
Switch(Config)#interface Ethernet 1/0/2
Switch(config-If-Ethernet1/0/2)#switchport mode trunk
Switch(config-If-Ethernet1/0/2)# ulpp group 1 slave
Switch(config-If-Ethernet1/0/2)# ulpp group 2 master
Switch(config-If-Ethernet1/0/2)#exit
SwitchB configuration task list:
Switch(Config)#interface ethernet 1/0/1
Switch(config-If-Ethernet1/0/1)#switchport mode trunk
Switch(config-If-Ethernet1/0/1)# ulpp flush enable mac
Switch(config-If-Ethernet1/0/1)# ulpp flush enable arp
SwitchC configuration task list:
Switch(Config)#interface ethernet 1/0/2
Switch(config-If-Ethernet1/0/2)# switchport mode trunk