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](/storage/images/Document/Maipu/reliability/config-erps-intersected-ring.jpg)
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
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#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
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#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
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#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
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#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
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#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
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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
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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
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#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
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#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
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#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
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#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
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#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
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#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
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#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
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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
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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