Example for Configuring an ERPS Single Ring

This section provides an example for configuring an ERPS single ring.

Networking Requirements

Generally, redundant links are used on an Ethernet switching network to provide link backup and enhance network reliability. The use of redundant links, however, may produce loops, causing broadcast storms and rendering the MAC address table unstable. As a result, the communication quality deteriorates, and communication services may even be interrupted.

To prevent loops caused by redundant links, enable ERPS on the devices of the ring network. As shown in Figure 1, Device A through Device D constitute an aggregation ring that provides Layer 2 aggregation services and accesses a Layer 3 network for service processing. The aggregation ring runs ERPS, providing protection switching for Layer 2 redundant links. ERPS ring1 and ERPS ring2 are configured on Device A through Device D. P1 on Device B is a blocked port on ERPS ring1, and P2 on Device A is a blocked port on ERPS ring2, implementing load balancing and link backup.

Figure 1 ERPS multi-instance networking

Interfaces 1 and 2 in this example represent GE 0/1/1 and GE 0/1/2, respectively.

Configuration Roadmap

The configuration roadmap is as follows:

Configure the trunk link type for all ports to be added to ERPS rings.
Create ERPS rings and configure control VLANs and ERP instances for them.
Add Layer 2 ports to the ERPS rings and specify port roles.
Configure the guard timer and WTR timer for the ERPS rings.
Configure the Layer 2 forwarding function on Device A through Device D.

Data Preparation

To complete the configuration, you need the following data:

ERPS ring ID, control VLAN ID, and ERP instance ID
Guard timer and WTR timer values
VLAN ID for Layer 2 forwarding

Procedure

Configure the trunk link type for all ports to be added to ERPS rings.

# Configure Device A.

<HUAWEI> system-view
[~HUAWEI] sysname DeviceA
[*HUAWEI] commit
[~DeviceA] interface gigabitethernet 0/1/1
[~DeviceA-GigabitEthernet0/1/1] portswitch
[*DeviceA-GigabitEthernet0/1/1] undo shutdown
[*DeviceA-GigabitEthernet0/1/1] port link-type trunk
[*DeviceA-GigabitEthernet0/1/1] quit
[*DeviceA] interface gigabitethernet 0/1/2
[*DeviceA-GigabitEthernet0/1/2] portswitch
[*DeviceA-GigabitEthernet0/1/2] undo shutdown
[*DeviceA-GigabitEthernet0/1/2] port link-type trunk
[*DeviceA-GigabitEthernet0/1/2] quit
[*DeviceA] commit

# Configure Device B.

<HUAWEI> system-view
[~HUAWEI] sysname DeviceB
[*HUAWEI] commit
[~DeviceB] interface gigabitethernet 0/1/1
[~DeviceB-GigabitEthernet0/1/1] portswitch
[*DeviceB-GigabitEthernet0/1/1] undo shutdown
[*DeviceB-GigabitEthernet0/1/1] port link-type trunk
[*DeviceB-GigabitEthernet0/1/1] quit
[*DeviceB] interface gigabitethernet 0/1/2
[*DeviceB-GigabitEthernet0/1/2] portswitch
[*DeviceB-GigabitEthernet0/1/2] undo shutdown
[*DeviceB-GigabitEthernet0/1/2] port link-type trunk
[*DeviceB-GigabitEthernet0/1/2] quit
[*DeviceB] commit

# Configure Device C.

<HUAWEI> system-view
[~HUAWEI] sysname DeviceC
[*HUAWEI] commit
[~DeviceC] interface gigabitethernet 0/1/1
[~DeviceC-GigabitEthernet0/1/1] portswitch
[*DeviceC-GigabitEthernet0/1/1] undo shutdown
[*DeviceC-GigabitEthernet0/1/1] port link-type trunk
[*DeviceC-GigabitEthernet0/1/1] quit
[*DeviceC] interface gigabitethernet 0/1/2
[*DeviceC-GigabitEthernet0/1/2] portswitch
[*DeviceC-GigabitEthernet0/1/2] undo shutdown
[*DeviceC-GigabitEthernet0/1/2] port link-type trunk
[*DeviceC-GigabitEthernet0/1/2] quit
[*DeviceC] commit

# Configure Device D.

<HUAWEI> system-view
[~HUAWEI] sysname DeviceD
[*HUAWEI] commit
[~DeviceD] interface gigabitethernet 0/1/1
[~DeviceD-GigabitEthernet0/1/1] portswitch
[*DeviceD-GigabitEthernet0/1/1] undo shutdown
[*DeviceD-GigabitEthernet0/1/1] port link-type trunk
[*DeviceD-GigabitEthernet0/1/1] quit
[*DeviceD] interface gigabitethernet 0/1/2
[*DeviceD-GigabitEthernet0/1/2] portswitch
[*DeviceD-GigabitEthernet0/1/2] undo shutdown
[*DeviceD-GigabitEthernet0/1/2] port link-type trunk
[*DeviceD-GigabitEthernet0/1/2] quit
[*DeviceD] commit

Create ERPS ring1 and ERPS ring2 and configure ERP instances for the two rings. Set the control VLAN ID of ERPS ring1 to 10 and the control VLAN ID of ERPS ring2 to 20. Enable ERPS ring1 to transmit data packets carrying VLAN IDs from 100 to 200 and enable ERPS ring2 to transmit data packets carrying VLAN IDs from 300 to 400.

# Configure Device A.

[~DeviceA] erps ring 1
[*DeviceA-erps-ring1] control-vlan 10
[*DeviceA-erps-ring1] protected-instance 1
[*DeviceA-erps-ring1] quit
[*DeviceA] vlan instance
[*DeviceA-vlan-instance] instance 1 vlan 10 100 to 200
[*DeviceA-vlan-instance] commit
[~DeviceA-vlan-instance] quit
[~DeviceA] erps ring 2
[*DeviceA-erps-ring2] control-vlan 20
[*DeviceA-erps-ring2] protected-instance 2
[*DeviceA-erps-ring2] quit
[*DeviceA] vlan instance
[*DeviceA-vlan-instance] instance 2 vlan 20 300 to 400
[*DeviceA-vlan-instance] commit
[~DeviceA-vlan-instance] quit

# Configure Device B.

[~DeviceB] erps ring 1
[*DeviceB-erps-ring1] control-vlan 10
[*DeviceB-erps-ring1] protected-instance 1
[*DeviceB-erps-ring1] quit
[*DeviceB] vlan instance
[*DeviceB-vlan-instance] instance 1 vlan 10 100 to 200
[*DeviceB-vlan-instance] commit
[~DeviceB-vlan-instance] quit
[~DeviceB] erps ring 2
[*DeviceB-erps-ring2] control-vlan 20
[*DeviceB-erps-ring2] protected-instance 2
[*DeviceB-erps-ring2] quit
[*DeviceB] vlan instance
[*DeviceB-vlan-instance] instance 2 vlan 20 300 to 400
[*DeviceB-vlan-instance] commit
[~DeviceB-vlan-instance] quit

# Configure Device C.

[~DeviceC] erps ring 1
[~DeviceC-erps-ring1] control-vlan 10
[*DeviceC-erps-ring1] protected-instance 1
[*DeviceC-erps-ring1] quit
[*DeviceC] vlan instance
[*DeviceC-vlan-instance] instance 1 vlan 10 100 to 200
[*DeviceC-vlan-instance] commit
[~DeviceC-vlan-instance] quit
[~DeviceC] erps ring 2
[*DeviceC-erps-ring2] control-vlan 20
[*DeviceC-erps-ring2] protected-instance 2
[*DeviceC-erps-ring2] quit
[*DeviceC] vlan instance
[*DeviceC-vlan-instance] instance 2 vlan 20 300 to 400
[*DeviceC-vlan-instance] commit
[~DeviceC-vlan-instance] quit

# Configure Device D.

[~DeviceD] erps ring 1
[*DeviceD-erps-ring1] control-vlan 10
[*DeviceD-erps-ring1] protected-instance 1
[*DeviceD-erps-ring1] quit
[*DeviceD] vlan instance
[*DeviceD-vlan-instance] instance 1 vlan 10 100 to 200
[*DeviceD-vlan-instance] commit
[~DeviceD-vlan-instancen] quit
[~DeviceD] erps ring 2
[*DeviceD-erps-ring2] control-vlan 20
[*DeviceD-erps-ring2] protected-instance 2
[*DeviceD-erps-ring2] quit
[*DeviceD] vlan instance
[*DeviceD-vlan-instance] instance 2 vlan 20 300 to 400
[*DeviceD-vlan-instance] commit
[~DeviceD-vlan-instance] quit

Add Layer 2 ports to the ERPS rings and specify port roles. Specifically, configure GE 0/1/1 on Device A and GE 0/1/1 on Device B as their respective RPL owner ports.

# Configure Device A.

[~DeviceA] interface gigabitethernet 0/1/1
[*DeviceA-GigabitEthernet0/1/1] stp disable
[*DeviceA-GigabitEthernet0/1/1] erps ring 1
[*DeviceA-GigabitEthernet0/1/1] erps ring 2 rpl owner
[*DeviceA-GigabitEthernet0/1/1] quit
[*DeviceA] interface gigabitethernet 0/1/2
[*DeviceA-GigabitEthernet0/1/2] stp disable
[*DeviceA-GigabitEthernet0/1/2] erps ring 1
[*DeviceA-GigabitEthernet0/1/2] erps ring 2
[*DeviceA-GigabitEthernet0/1/2] quit
[*DeviceA] commit

# Configure Device B.

[~DeviceB] interface gigabitethernet 0/1/1
[*DeviceB-GigabitEthernet0/1/1] stp disable
[*DeviceB-GigabitEthernet0/1/1] erps ring 1
[*DeviceA-GigabitEthernet0/1/1] erps ring 2
[*DeviceB-GigabitEthernet0/1/1] quit
[*DeviceB] interface gigabitethernet 0/1/2
[*DeviceB-GigabitEthernet0/1/2] stp disable
[*DeviceB-GigabitEthernet0/1/2] erps ring 1 rpl owner
[*DeviceA-GigabitEthernet0/1/2] erps ring 2
[*DeviceB-GigabitEthernet0/1/2] quit
[*DeviceB] commit

# Configure Device C.

[~DeviceC] interface gigabitethernet 0/1/1
[*DeviceC-GigabitEthernet0/1/1] stp disable
[*DeviceC-GigabitEthernet0/1/1] erps ring 1
[*DeviceC-GigabitEthernet0/1/1] erps ring 2
[*DeviceC-GigabitEthernet0/1/1] quit
[*DeviceC] interface gigabitethernet 0/1/2
[*DeviceC-GigabitEthernet0/1/2] stp disable
[*DeviceC-GigabitEthernet0/1/2] erps ring 1
[*DeviceC-GigabitEthernet0/1/2] erps ring 2
[*DeviceC-GigabitEthernet0/1/2] quit
[*DeviceC] commit

# Configure Device D.

[~DeviceD] interface gigabitethernet 0/1/1
[*DeviceD-GigabitEthernet0/1/1] stp disable
[*DeviceD-GigabitEthernet0/1/1] erps ring 1
[*DeviceD-GigabitEthernet0/1/1] erps ring 2
[*DeviceD-GigabitEthernet0/1/1] quit
[*DeviceD] interface gigabitethernet 0/1/2
[*DeviceD-GigabitEthernet0/1/2] stp disable
[*DeviceD-GigabitEthernet0/1/2] erps ring 1
[*DeviceD-GigabitEthernet0/1/2] erps ring 2
[*DeviceD-GigabitEthernet0/1/2] quit
[*DeviceD] commit

Configure the guard timer and WTR timer for the ERPS rings.

# Configure Device A.

[~DeviceA] erps ring 1
[~DeviceA-erps-ring1] wtr-timer 6
[*DeviceA-erps-ring1] guard-timer 100
[*DeviceA-vlan-instance] quit
[*DeviceA] erps ring 2
[*DeviceA-erps-ring2] wtr-timer 6
[*DeviceA-erps-ring2] guard-timer 100
[*DeviceA-vlan-instance] quit
[*DeviceA] commit

# Configure Device B.

[~DeviceB] erps ring 1
[~DeviceB-erps-ring1] wtr-timer 6
[*DeviceB-erps-ring1] guard-timer 100
[*DeviceB-vlan-instance] quit
[*DeviceB] erps ring 2
[*DeviceB-erps-ring2] wtr-timer 6
[*DeviceB-erps-ring2] guard-timer 100
[*DeviceB-vlan-instance] quit
[*DeviceB] commit

# Configure Device C.

[~DeviceC] erps ring 1
[~DeviceC-erps-ring1] wtr-timer 6
[*DeviceC-erps-ring1] guard-timer 100
[*DeviceC-vlan-instance] quit
[*DeviceC] erps ring 2
[*DeviceC-erps-ring2] wtr-timer 6
[*DeviceC-erps-ring2] guard-timer 100
[*DeviceC-vlan-instance] quit
[*DeviceC] commit

# Configure Device D.

[~DeviceD] erps ring 1
[~DeviceD-erps-ring1] wtr-timer 6
[*DeviceD-erps-ring1] guard-timer 100
[*DeviceD-vlan-instance] quit
[*DeviceD] erps ring 2
[*DeviceD-erps-ring2] wtr-timer 6
[*DeviceD-erps-ring2] guard-timer 100
[*DeviceD-vlan-instance] quit
[*DeviceD] commit

Configure the Layer 2 forwarding function on Device A through Device D.

# Configure Device A.

[~DeviceA] vlan batch 100 to 200 300 to 400
[*DeviceA] interface gigabitethernet 0/1/1
[*DeviceA-GigabitEthernet0/1/1] port trunk allow-pass vlan 100 to 200 300 to 400
[*DeviceA-GigabitEthernet0/1/1] quit
[*DeviceA] interface gigabitethernet 0/1/2
[*DeviceA-GigabitEthernet0/1/2] port trunk allow-pass vlan 100 to 200 300 to 400
[*DeviceA-GigabitEthernet0/1/2] quit
[*DeviceA] commit

# Configure Device B.

[~DeviceB] vlan batch 100 to 200 300 to 400
[*DeviceB] interface gigabitethernet 0/1/1
[*DeviceB-GigabitEthernet0/1/1] port trunk allow-pass vlan 100 to 200 300 to 400
[*DeviceB-GigabitEthernet0/1/1] quit
[*DeviceB] interface gigabitethernet 0/1/2
[*DeviceB-GigabitEthernet0/1/2] port trunk allow-pass vlan 100 to 200 300 to 400
[*DeviceB-GigabitEthernet0/1/2] quit
[*DeviceB] commit

# Configure Device C.

[~DeviceC] vlan batch 100 to 200 300 to 400
[*DeviceC] interface gigabitethernet 0/1/1
[*DeviceC-GigabitEthernet0/1/1] port trunk allow-pass vlan 100 to 200 300 to 400
[*DeviceC-GigabitEthernet0/1/1] quit
[*DeviceC] interface gigabitethernet 0/1/2
[*DeviceC-GigabitEthernet0/1/2] port trunk allow-pass vlan 100 to 200 300 to 400
[*DeviceC-GigabitEthernet0/1/2] quit

# Configure Device D.

[~DeviceD] vlan batch 100 to 200 300 to 400
[*DeviceD] interface gigabitethernet 0/1/1
[*DeviceD-GigabitEthernet0/1/1] port trunk allow-pass vlan 100 to 200 300 to 400
[*DeviceD-GigabitEthernet0/1/1] quit
[*DeviceD] interface gigabitethernet 0/1/2
[*DeviceD-GigabitEthernet0/1/2] port trunk allow-pass vlan 100 to 200 300 to 400
[*DeviceD-GigabitEthernet0/1/2] quit
[*DeviceD] commit

Verify the configuration.

After completing the configurations, run either of the following commands to verify the configuration. The following example uses the command output on Device B.

Run the display erps command on Device B. The command output shows summary configurations of Device B ports added to the ERPS ring and ring configurations.

[~DeviceB] display erps
D  : Discarding
F  : Forwarding
R  : RPL Owner
N  : RPL Neighbour
FS : Forced Switch
MS : Manual Switch
Total number of rings configured = 2
Ring  Control  WTR Timer  Guard Timer  Port 1              Port 2
ID    VLAN     (min)      (csec)
--------------------------------------------------------------------------------
   1       10          6          100  (F)GE0/1/1          (D,R)GE0/1/2
   2       20          6          100  (F)GE0/1/1          (F)GE0/1/2
--------------------------------------------------------------------------------

Run the display erps verbose command on Device B. The command output shows detailed configurations of Device B ports added to the ERPS ring and ring configurations.

[~DeviceB] display erps verbose
Ring ID                             : 1
Description                         : Ring 1
Control Vlan                        : 10
Protected Instance                  : 1
Service Vlan                        : 100 to 200
WTR Timer Setting (min)             : 6      Running (s)           : 0
Guard Timer Setting (csec)          : 100    Running (csec)        : 0
Holdoff Timer Setting (deciseconds) : 0      Running (deciseconds) : 0
WTB Timer Running (csec)            : 0
Ring State                          : Idle
RAPS_MEL                            : 7
Revertive Mode                      : Revertive
R-APS Channel Mode                  : -
Version                             : 1
Sub-ring                            : No
Forced Switch Port                  : -
Manual Switch Port                  : -
TC-Notify                           : -
Time since last topology change     : 0 days 0h:35m:5s
--------------------------------------------------------------------------------
Port                Port Role     Port Status     Signal Status
--------------------------------------------------------------------------------
GE0/1/1             Common        Forwarding      Non-failed
GE0/1/2             RPL Owner     Discarding      Non-failed

Ring ID                             : 2
Description                         : Ring 2
Control Vlan                        : 20
Protected Instance                  : 2
Service Vlan                        : 300 to 400
WTR Timer Setting (min)             : 6      Running (s)           : 0
Guard Timer Setting (csec)          : 100    Running (csec)        : 0
Holdoff Timer Setting (deciseconds) : 0      Running (deciseconds) : 0
WTB Timer Running (sec)             : 0
Ring State                          : Idle
RAPS_MEL                            : 7
Revertive Mode                      : Revertive
R-APS Channel Mode                  : -
Version                             : 1
Sub-ring                            : No 
Forced Switch Port                  : -
Manual Switch Port                  : -
TC-Notify                           : -
Time since last topology change     : 0 days 0h:35m:30s
--------------------------------------------------------------------------------
Port                Port Role     Port Status     Signal Status
--------------------------------------------------------------------------------
GE0/1/1             Common        Forwarding      Non-failed
GE0/1/2             Common        Forwarding      Non-failed

Configuration Files

Device A configuration file

#
 sysname DeviceA
#
 vlan batch 10 20 100 to 200 300 to 400
#
vlan instance
 instance 1 vlan 10 100 to 200
 instance 2 vlan 20 300 to 400
#
erps ring 1
 control-vlan 10
 protected-instance 1
 wtr-timer 6
 guard-timer 100
#
erps ring 2
 control-vlan 20
 protected-instance 2
 wtr-timer 6
 guard-timer 100
#
interface GigabitEthernet0/1/1
 portswitch
 undo shutdown
 port link-type trunk
 port trunk allow-pass vlan 10 20 100 to 200 300 to 400
 stp disable
 erps ring 1
 erps ring 2 rpl owner
#
interface GigabitEthernet0/1/2
 portswitch
 undo shutdown
 port link-type trunk
 port trunk allow-pass vlan 10 20 100 to 200 300 to 400
 stp disable
 erps ring 1
 erps ring 2
#
return

Device B configuration file

#
 sysname DeviceB
#
 vlan batch 10 20 100 to 200 300 to 400
#
vlan instance
 instance 1 vlan 10 100 to 200
 instance 2 vlan 20 300 to 400
#
erps ring 1
 control-vlan 10
 protected-instance 1
 wtr-timer 6
 guard-timer 100
#
erps ring 2
 control-vlan 20
 protected-instance 2
 wtr-timer 6
 guard-timer 100
#
interface GigabitEthernet0/1/1
 portswitch
 undo shutdown
 port link-type trunk
 port trunk allow-pass vlan 10 20 100 to 200 300 to 400
 stp disable
 erps ring 1
 erps ring 2
#
interface GigabitEthernet0/1/2
 portswitch
 undo shutdown
 port link-type trunk
 port trunk allow-pass vlan 10 20 100 to 200 300 to 400
 stp disable
 erps ring 1 rpl owner
 erps ring 2
#
return

Device C configuration file

#
 sysname DeviceC
#
 vlan batch 10 20 100 to 200 300 to 400
#
vlan instance
 instance 1 vlan 10 100 to 200
 instance 2 vlan 20 300 to 400
#
erps ring 1
 control-vlan 10
 protected-instance 1
 wtr-timer 6
 guard-timer 100
#
erps ring 2
 control-vlan 20
 protected-instance 2
 wtr-timer 6
 guard-timer 100
#
interface GigabitEthernet0/1/1
 portswitch
 undo shutdown
 port link-type trunk
 port trunk allow-pass vlan 10 20 100 to 200 300 to 400
 stp disable
 erps ring 1
 erps ring 2
#
interface GigabitEthernet0/1/2
 portswitch
 undo shutdown
 port link-type trunk
 port trunk allow-pass vlan 10 20 100 to 200 300 to 400
 stp disable
 erps ring 1
 erps ring 2
#
return

Device D configuration file

#
 sysname DeviceD
#
 vlan batch 10 20 100 to 200 300 to 400
#
vlan instance
 instance 1 vlan 10 100 to 200
 instance 2 vlan 20 300 to 400
#
erps ring 1
 control-vlan 10
 protected-instance 1
 wtr-timer 6
 guard-timer 100
#
erps ring 2
 control-vlan 20
 protected-instance 2
 wtr-timer 6
 guard-timer 100
#
interface GigabitEthernet0/1/1
 portswitch
 undo shutdown
 port link-type trunk
 port trunk allow-pass vlan 10 20 100 to 200 300 to 400
 stp disable
 erps ring 1
 erps ring 2
#
interface GigabitEthernet0/1/2
 portswitch
 undo shutdown
 port link-type trunk
 port trunk allow-pass vlan 10 20 100 to 200 300 to 400
 stp disable
 erps ring 1
 erps ring 2
#
return