+7(495) 797-3311 www.qtech.ruМосква, Новозаводская ул., 18, стр. 136752.3 ULPP Typical Examples52.3.1 ULPP Typical Example1ULPP typical example1The above topology is the typical application environment of ULPP protocol.SwitchA has two uplinks, they are SwitchB and SwitchC. When any protocols are not enabled,this topology forms a ring. For avoiding the loopback, SwitchA can configure ULPP protocol,the master port and the slave port of ULPP group. When both master port and slave port areup, the slave port will be set as standby state and will not forward the data packets. When themaster port is down, the slave port will be set as forwarding state and switch to the uplink.SwitchB and SwitchC can enable the command that receives the flush packets, it is used toassociate with ULPP protocol running of SwitchA to switch the uplink immediately and reducethe switch delay.When configuring ULPP protocol of SwitchA, first, create a ULPP group and configure theprotection VLAN of this group as vlan10, then configure interface Ethernet 1/1 as the masterport, interface Ethernet 1/2 as the slave port, the control VLAN as 10. SwitchB and SwitchCconfigure the flush packets that receive ULPP.SwitchA configuration task list:Switch(Config)#vlan 10Switch(Config-vlan10)#switchport interface ethernet 1/1; 1/2Switch(Config-vlan10)#exitSwitch(Config)#spanning-tree mst configurationSwitch(Config-Mstp-Region)#instance 1 vlan 10Switch(Config-Mstp-Region)#exitSwitch(Config)#ulpp group 1SwitchB E1/1SwitchDSwitchAE1/2 SwitchCE1/2E1/1
