Configure ERPS Intersected Ring

Network Requirements

All devices are in one L2 network.
Device1-device2-device4-device3 and device3-device5-device6-device4 form two physical loops respectively, and all devices enable ERPS to the link loop.

Network Topology

Configure ERPS intersected ring

Figure 11-3 Configure ERPS intersected ring

Configuration Steps

Step 1: Configure vlan and port link type.

#On Device1, create VLAN2, and VLAN100-VLAN200, and configure the link type of ports gigabitethernet0/1 and gigabitethernet0/2 as Trunk, permitting the services of VLAN2, and VLAN100-VLAN200 to pass.

Device1#configure terminal
Device1(config)#vlan 2,100-200
Device1(config)# interface gigabitethernet 0/1
Device1(config-if-gigabitethernet0/1)#shutdown
Device1(config-if-gigabitethernet0/1)# switchport mode trunk
Device1(config-if-gigabitethernet0/1)# no switchport trunk allowed vlan all
Device1(config-if-gigabitethernet0/1)# switchport trunk allowed vlan add 2,100-200
Device1(config-if-gigabitethernet0/1)#exit
Device1(config)# interface gigabitethernet 0/2
Device1(config-if-gigabitethernet0/1)# switchport mode trunk
Device1(config-if-gigabitethernet0/1)# no switchport trunk allowed vlan all
Device1(config-if-gigabitethernet0/1)# switchport trunk allowed vlan add 2,100-200
Device1(config-if-gigabitethernet0/1)#end

#On Device2, create VLAN2, and VLAN100-VLAN200, and configure the link type of ports gigabitethernet0/1 and gigabitethernet0/2 as Trunk, permitting the services of VLAN2, and VLAN100-VLAN200 to pass.

Device2#configure terminal
Device2(config)#vlan 2,100-200
Device2(config)# interface gigabitethernet 0/1
Device2(config-if-gigabitethernet0/1)#shutdown
Device2(config-if-gigabitethernet0/1)# switchport mode trunk
Device2(config-if-gigabitethernet0/1)# no switchport trunk allowed vlan all
Device2(config-if-gigabitethernet0/1)# switchport trunk allowed vlan add 2,100-200
Device2(config-if-gigabitethernet0/1)#exit
Device2(config)# interface gigabitethernet 0/2
Device2(config-if-gigabitethernet0/1)# switchport mode trunk
Device2(config-if-gigabitethernet0/1)# no switchport trunk allowed vlan all
Device2(config-if-gigabitethernet0/1)# switchport trunk allowed vlan add 2,100-200
Device2(config-if-gigabitethernet0/1)#end

#On Device3, create VLAN2-VLAN3, and VLAN100-VLAN200, and configure the link type of ports gigabitethernet0/1 and gigabitethernet0/2 as Trunk, permitting the services of VLAN2, and VLAN100-VLAN200 to pass. Configure the link type of port gigabitethernet0/3 as Trunk, permitting the services of VLAN3, vlan100-VLAN200 to pass.

Device3#configure terminal
Device3(config)#vlan 2,100-200
Device3(config)# interface gigabitethernet 0/1
Device3(config-if-gigabitethernet0/1)#shutdown
Device3(config-if-gigabitethernet0/1)# switchport mode trunk
Device3(config-if-gigabitethernet0/1)# no switchport trunk allowed vlan all
Device3(config-if-gigabitethernet0/1)# switchport trunk allowed vlan add 2,100-200
Device3(config-if-gigabitethernet0/1)#exit
Device3(config)# interface gigabitethernet 0/2
Device3(config-if-gigabitethernet0/1)# switchport mode trunk
Device3(config-if-gigabitethernet0/1)# no switchport trunk allowed vlan all
Device3(config-if-gigabitethernet0/1)# switchport trunk allowed vlan add 2,100-200
Device3(config-if-gigabitethernet0/1)#end
Device3(config)# interface gigabitethernet 0/3
Device3(config-if-gigabitethernet0/1)#shutdown
Device3(config-if-gigabitethernet0/1)# switchport mode trunk
Device3(config-if-gigabitethernet0/1)# no switchport trunk allowed vlan all
Device3(config-if-gigabitethernet0/1)# switchport trunk allowed vlan add 3,100-200
Device3(config-if-gigabitethernet0/1)#exit

#On Device4, create VLAN2-VLAN3, and VLAN100-VLAN200, and configure the link type of ports gigabitethernet0/1 and gigabitethernet0/2 as Trunk, permitting the services of VLAN2, and VLAN100-VLAN200 to pass. Configure the link type of port gigabitethernet0/3 as Trunk, permitting the services of VLAN3, vlan100-VLAN200 to pass.

Device4#configure terminal
Device4(config)#vlan 2,100-200
Device4(config)# interface gigabitethernet 0/1
Device4(config-if-gigabitethernet0/1)#shutdown
Device4(config-if-gigabitethernet0/1)# switchport mode trunk
Device4(config-if-gigabitethernet0/1)# no switchport trunk allowed vlan all
Device4(config-if-gigabitethernet0/1)# switchport trunk allowed vlan add 2,100-200
Device4(config-if-gigabitethernet0/1)#exit
Device4(config)# interface gigabitethernet 0/2
Device4(config-if-gigabitethernet0/1)# switchport mode trunk
Device4(config-if-gigabitethernet0/1)# no switchport trunk allowed vlan all
Device4(config-if-gigabitethernet0/1)# switchport trunk allowed vlan add 2,100-200
Device4(config-if-gigabitethernet0/1)#end
Device4(config)# interface gigabitethernet 0/3
Device4(config-if-gigabitethernet0/1)#shutdown
Device4(config-if-gigabitethernet0/1)# switchport mode trunk
Device4(config-if-gigabitethernet0/1)# no switchport trunk allowed vlan all
Device4(config-if-gigabitethernet0/1)# switchport trunk allowed vlan add 3,100-200
Device4(config-if-gigabitethernet0/1)#exit

#On Device5, create VLAN3, and VLAN100-VLAN200, and configure the link type of ports gigabitethernet0/1 and gigabitethernet0/2 as Trunk, permitting the services of VLAN3, and VLAN100-VLAN200 to pass.

Device5#configure terminal
Device5(config)#vlan 2,100-200
Device5(config)# interface gigabitethernet 0/1
Device5(config-if-gigabitethernet0/1)#shutdown
Device5(config-if-gigabitethernet0/1)# switchport mode trunk
Device5(config-if-gigabitethernet0/1)# no switchport trunk allowed vlan all
Device5(config-if-gigabitethernet0/1)# switchport trunk allowed vlan add 3,100-200
Device5(config-if-gigabitethernet0/1)#exit
Device5(config)# interface gigabitethernet 0/2
Device5(config-if-gigabitethernet0/1)# switchport mode trunk
Device5(config-if-gigabitethernet0/1)# no switchport trunk allowed vlan all
Device5(config-if-gigabitethernet0/1)# switchport trunk allowed vlan add 3,100-200
Device5(config-if-gigabitethernet0/1)#end

#On Device6, create VLAN3, and VLAN100-VLAN200, and configure the link type of ports gigabitethernet0/1 and gigabitethernet0/2 as Trunk, permitting the services of VLAN3, and VLAN100-VLAN200 to pass.

Device6#configure terminal
Device6(config)#vlan 3,100-200
Device6(config)# interface gigabitethernet 0/1
Device6(config-if-gigabitethernet0/1)#shutdown
Device6(config-if-gigabitethernet0/1)# switchport mode trunk
Device6(config-if-gigabitethernet0/1)# no switchport trunk allowed vlan all
Device6(config-if-gigabitethernet0/1)# switchport trunk allowed vlan add 3,100-200
Device6(config-if-gigabitethernet0/1)#exit
Device6(config)# interface gigabitethernet 0/2
Device6(config-if-gigabitethernet0/1)# switchport mode trunk
Device6(config-if-gigabitethernet0/1)# no switchport trunk allowed vlan all
Device6(config-if-gigabitethernet0/1)# switchport trunk allowed vlan add 3,100-200
Device6(config-if-gigabitethernet0/1)#end

Step 2: Configure the MST instance.

#On Device1–Device6, configure MST instance 1 to map vlan100-200, and activate the instance.

Device1#configure terminal
Device1(config)# spanning-tree mst configuration
Device1(config-mst)# instance 1 vlan 100-200
Device1(config-mst)# active configuration pending
Device1(config-mst)#end

Step 3: Configure ERPS.

#On Device1, configure ERPS ring1, configures vlan2 as control VLAN of ring1, configure gigabitethernet0/1 as the normal port of ring1, configure gigabitethernet0/2 as the owner port of ring1, configure instance 1 as data VLAN of ring1, and enable ERPS function of ring1.

Device1# configure terminal
Device1(config)#erps ring 1
Device1(config-erps1)# control vlan 2
Device1(config-erps1)# port0 interface g0/1
Device1(config-erps1)# port1 interface g0/2 rpl owner
Device1(config-erps1)# instance 1
Device1(config-erps1)# erps enable
Device1(config-erps1)# end
Device1(config)# interface gigabitethernet 0/1
Device1(config-if-gigabitethernet0/1)#no shutdown
Device1(config-if-gigabitethernet0/1)# end

#On Device2, configure ERPS ring1, configures vlan2 as control VLAN of ring1, configure gigabitethernet0/1 as the neighbor port of ring1, configure gigabitethernet0/2 as the normal port of ring1, configure instance 1 as data VLAN of ring1, and enable ERPS function of ring1.

Device2# configure terminal
Device2(config)#erps ring 1
Device2(config-erps1)# control vlan 2
Device2(config-erps1)# port0 interface g0/1 rpl neighbour
Device2(config-erps1)# port1 interface g0/2
Device2(config-erps1)# instance 1
Device2(config-erps1)# erps enable
Device2(config-erps1)# exit
Device2(config)# interface gigabitethernet 0/1
Device2(config-if-gigabitethernet0/1)#no shutdown
Device2(config-if-gigabitethernet0/1)# end

#On Device3, configure ERPS ring1, configures vlan2 as control VLAN of ring1, configure gigabitethernet0/1 as the normal port of ring1, configure gigabitethernet0/2 as the normal port of ring1, configure instance 1 as data VLAN of ring1, and enable ERPS function of ring1.

Device3# configure terminal
Device3(config)#erps ring 1
Device3(config-erps1)# control vlan 2
Device3(config-erps1)# port0 interface g0/1
Device3(config-erps1)# port1 interface g0/2
Device3(config-erps1)# instance 1
Device3(config-erps1)# erps enable
Device3(config-erps1)# exit
Device2(config)# interface gigabitethernet 0/1
Device2(config-if-gigabitethernet0/1)#no shutdown
Device2(config-if-gigabitethernet0/1)# end

#On Device3, configure ERPS ring2, configures vlan3 as control VLAN of ring2, configure gigabitethernet0/3 as the normal port of ring2, configure instance 1 as data VLAN of ring2, configure ring2 as sub-ring, and enable ERPS function of ring2.

Device3# configure terminal
Device3(config)#erps ring 2
Device3(config-erps1)# control vlan 3
Device3(config-erps1)# port0 interface g0/3
Device3(config-erps1)# instance 1
Device3(config-erps1)# sub-ring
Device3(config-erps1)# erps enable
Device3(config-erps1)# exit
Device3(config)# interface gigabitethernet 0/3
Device3(config-if-gigabitethernet0/1)#no shutdown
Device3(config-if-gigabitethernet0/1)# end

#On Device4, configure ERPS ring1, configures vlan2 as control VLAN of ring1, configure gigabitethernet0/1 as the normal port of ring1, configure gigabitethernet0/2 as the normal port of ring1, configure instance 1 as data VLAN of ring1, and enable the ERPS function of ring1.

Device4# configure terminal
Device4(config)#erps ring 1
Device4(config-erps1)# control vlan 2
Device4(config-erps1)# port0 interface g0/1
Device4(config-erps1)# port1 interface g0/2
Device4(config-erps1)# instance 1
Device4(config-erps1)# erps enable
Device4(config-erps1)# exit
Device4(config)# interface gigabitethernet 0/1
Device4(config-if-gigabitethernet0/1)#no shutdown
Device4(config-if-gigabitethernet0/1)# end

#On Device4, configure ERPS ring2, configures vlan3 as control VLAN of ring2, configure gigabitethernet0/3 as the normal port of ring2, configure instance 1 as data VLAN of ring2, configure ring2 as sub-ring, and enable ERPS function of ring2.

Device4# configure terminal
Device4(config)#erps ring 2
Device4(config-erps1)# control vlan 3
Device4(config-erps1)# port0 interface g0/3
Device4(config-erps1)# instance 1
Device4(config-erps1)# sub-ring
Device4(config-erps1)# erps enable
Device4(config-erps1)# exit
Device4(config)# interface gigabitethernet 0/3
Device4(config-if-gigabitethernet0/1)#no shutdown
Device4(config-if-gigabitethernet0/1)# end

#On Device5, configure ERPS ring2, configures vlan3 as control VLAN of ring2, configure gigabitethernet0/2 as the normal port of ring2, configure gigabitethernet0/1 as the owner port of ring2, configure instance 1 as data VLAN of ring2, configure ring2 as sub-ring, and enable ERPS function of ring2.

Device5# configure terminal
Device5(config)#erps ring 2
Device5(config-erps1)# control vlan 3
Device5(config-erps1)# port0 interface g0/1 rpl owner
Device5(config-erps1)# port0 interface g0/2
Device5(config-erps1)# instance 1
Device5(config-erps1)# sub-ring
Device5(config-erps1)# erps enable
Device5(config-erps1)# exit
Device5(config)# interface gigabitethernet 0/1
Device5(config-if-gigabitethernet0/1)#no shutdown
Device5(config-if-gigabitethernet0/1)# end

#On Device6, configure ERPS ring2, configures vlan3 as control VLAN of ring2, configure gigabitethernet0/2 as the neighbor port of ring2, configure gigabitethernet0/1 as the normal port of ring2, configure instance 1 as data VLAN of ring2, configure ring2 as sub-ring, and enable the ERPS function of ring2.

Device6# configure terminal
Device6(config)#erps ring 2
Device6(config-erps1)# control vlan 3
Device6(config-erps1)# port0 interface g0/1
Device6(config-erps1)# port0 interface g0/2 rpl neighbour
Device6(config-erps1)# instance 1
Device6(config-erps1)# sub-ring
Device6(config-erps1)# erps enable
Device6(config-erps1)# exit
Device6(config)# interface gigabitethernet 0/1
Device6(config-if-gigabitethernet0/1)#no shutdown
Device6(config-if-gigabitethernet0/1)# end

Step 4: Check the result.

#After the network topology becomes stable, query the ERPS information of the Device, and take device3 as an example.

#Query the ERPS information of Device3.

Device3# show erps ring 1 detail
Ring ID       : 1 
Version       : v2
R-APS mel     : 7 
Instance      : 1 vlans mapped : 100-200
Control VLAN  : 2 
Node role     : Normal
Node state    : idle 
Guard timer   : 500 ms       Running : 0 ms
Holdoff timer : 0 ms         Running : 0 ms
WTR timer     : 5 min        Running : 0 s
WTB timer     : 7 s          Running : 0 s
Subring       : No 
Tc-limit enable : No
Tc-limit Interval : 2
Tc-limit Threshold : 3 
Revertive operation : Revertive 
R-APS channel : Non-Virtual channel
Enable status : Enable
Gigabitethernet0/1 Flush Logic 
    Remote Node ID : 0000-0000-0000 
    Remote BPR     : 0
Gigabitethernet0/1 track CFM 
    MD Name   :  
    MA Name   :  
    MEP ID    : 0 
    RMEP ID   : 0 
    CFM State : 0
Gigabitethernet0/2 Flush Logic 
    Remote Node ID : 0000-0000-0000 
    Remote BPR     : 0
Gigabitethernet0/2 track CFM 
    MD Name   :  
    MA Name   :  
    MEP ID    : 0 
    RMEP ID   : 0 
    CFM State : 0 
Port   Name                  PortRole  SwitchType  PortStatus  SignalStatus   
----------------------------------------------------------------------- 
Port0  gigabitethernet0/1    Normal----------------Forwarding  Non-failed        
Port1  gigabitethernet0/2    Normal----------------Forwarding  Non-failed      
  
Device3# show erps ring 2 detail
Ring ID       : 2 
Version       : v2
R-APS mel     : 7 
Instance      : 1 vlans mapped	100-200 
Control VLAN  : 3
Node role     : Normal
Node state    : idle 
Guard timer   : 500 ms      Running : 0 ms
Holdoff timer : 0 ms        Running : 0 ms
WTR timer     : 5 min       Running : 0 s
WTB timer     : 7 s         Running : 0 s 
Subring       : No 
Tc-limit enable : No
Tc-limit Interval : 2
Tc-limit Threshold : 3 
Revertive operation : Revertive 
R-APS channel : Non-Virtual channel
Enable status : Enable
Gigabitethernet0/3 Flush Logic 
    Remote Node ID : 0000-0000-0000 
    Remote BPR     : 0
Gigabitethernet0/1 track CFM 
    MD Name   :  
    MA Name   :  
    MEP ID    : 0 
    RMEP ID   : 0 
    CFM State : 0 
Port   Name                 PortRole  SwitchType  PortStatus  SignalStatus   
-----------------------------------------------------------------------	 
Port0  gigabitethernet0/3   Normal----------------Forwarding  Non-failed