以ERPS单环多实例组网为例，重点介绍如何配置ERPS功能，帮助您配置ERPS基本功能。
组网需求
以太网交换网络中为了进行链路备份，提高网络可靠性，通常会使用冗余链路。但是使用冗余链路会在交换网络上产生环路，导致广播风暴以及MAC地址表不稳定等故障现象，从而导致用户通信质量较差，甚至通信中断。
为了解决使用冗余链路引起的环路问题，可以在组成环网的设备上部署ERPS协议，ERPS协议是ITU-T定义的一种二层破环协议标准，且收敛速度快，可以满足收敛速度达到电信级可靠性要求。如图1所示，以部署多实例的ERPS环为例，LSW1～LSW4组成环形组网，位于汇聚层，汇聚环完成业务的二层汇聚外，同时接入上级三层网络进行业务处理。汇聚环运行ERPS协议，提供汇聚环的二层冗余保护倒换功能。在LSW1～LSW4上配置两个ERPS实例ERPS环1和ERPS环2，ERPS环1阻塞LSW2的P1端口，ERPS环2阻塞LSW1的P2端口，实现负载分担并提供链路备份。
图1 ERPS多实例组网图
配置思路
采用如下的思路配置ERPS环：
1. 配置加入ERPS环的所有端口类型为Trunk型。 2. 创建ERPS环，并配置控制VLAN和保护实例。 3. 将二层端口加入ERPS环并配置端口角色。
4. 配置ERPS环的Guard Timer和WTR Timer定时器。 5. 配置LSW1～LSW4二层转发功能。
数据准备
为完成此配置例，需准备如下的数据：
ERPS环ID、控制VLAN ID和保护实例ID。 Guard Timer和WTR Timer定时器大小。 二层转发VLAN ID。
操作步骤
1. 配置加入ERPS环的所有端口类型为Trunk型。
# 配置LSW1。 [LSW1] interface gigabitethernet 0/0/1 [LSW1-GigabitEthernet0/0/1] port link-type trunk [LSW1-GigabitEthernet0/0/1] quit [LSW1] interface gigabitethernet 0/0/2 [LSW1-GigabitEthernet0/0/2] port link-type trunk [LSW1-GigabitEthernet0/0/2] quit # 配置LSW2。 [LSW2] interface gigabitethernet 0/0/1 [LSW2-GigabitEthernet0/0/1] port link-type trunk [LSW2-GigabitEthernet0/0/1] quit [LSW2] interface gigabitethernet 0/0/2 [LSW2-GigabitEthernet0/0/2] port link-type trunk [LSW2-GigabitEthernet0/0/2] quit # 配置LSW3。 [LSW3] interface gigabitethernet 0/0/1 [LSW3-GigabitEthernet0/0/1] port link-type trunk [LSW3-GigabitEthernet0/0/1] quit [LSW3] interface gigabitethernet 0/0/2 [LSW3-GigabitEthernet0/0/2] port link-type trunk [LSW3-GigabitEthernet0/0/2] quit # 配置LSW4。 [LSW4] interface gigabitethernet 0/0/1 [LSW4-GigabitEthernet0/0/1] port link-type trunk [LSW4-GigabitEthernet0/0/1] quit [LSW4] interface gigabitethernet 0/0/2 [LSW4-GigabitEthernet0/0/2] port link-type trunk [LSW4-GigabitEthernet0/0/2] quit 2. 创建ERPS环1、ERPS环2并配置两个ERPS环的保护实例，配置ERPS环1的控制VLAN ID 为10，ERPS环2的控制VLAN ID为20，ERPS环1传递VLAN100～VLAN200的数据报文，ERPS环2传递VLAN300～VLAN400的数据报文。 # 配置LSW1。 [LSW1] erps ring 1 [LSW1-erps-ring1] control-vlan 10 [LSW1-erps-ring1] protected-instance 1 [LSW1-erps-ring1] quit [LSW1] stp region-configuration [LSW1-mst-region] instance 1 vlan 10 100 to 200 [LSW1-mst-region] active region-configuration [LSW1-mst-region] quit [LSW1] erps ring 2 [LSW1-erps-ring2] control-vlan 20 [LSW1-erps-ring2] protected-instance 2 [LSW1-erps-ring2] quit [LSW1] stp region-configuration [LSW1-mst-region] instance 2 vlan 20 300 to 400 [LSW1-mst-region] active region-configuration [LSW1-mst-region] quit # 配置LSW2。 [LSW2] erps ring 1 [LSW2-erps-ring1] control-vlan 10 [LSW2-erps-ring1] protected-instance 1 [LSW2-erps-ring1] quit [LSW2] stp region-configuration [LSW2-mst-region] instance 1 vlan 10 100 to 200 [LSW2-mst-region] active region-configuration [LSW2-mst-region] quit [LSW2] erps ring 2 [LSW2-erps-ring2] control-vlan 20 [LSW2-erps-ring2] protected-instance 2 [LSW2-erps-ring2] quit [LSW2] stp region-configuration [LSW2-mst-region] instance 2 vlan 20 300 to 400 [LSW2-mst-region] active region-configuration [LSW2-mst-region] quit # 配置LSW3。 [LSW3] erps ring 1 [LSW3-erps-ring1] control-vlan 10 [LSW3-erps-ring1] protected-instance 1 [LSW3-erps-ring1] quit [LSW3] stp region-configuration [LSW3-mst-region] instance 1 vlan 10 100 to 200 [LSW3-mst-region] active region-configuration [LSW3-mst-region] quit [LSW3] erps ring 2 [LSW3-erps-ring2] control-vlan 20 [LSW3-erps-ring2] protected-instance 2 [LSW3-erps-ring2] quit [LSW3] stp region-configuration [LSW3-mst-region] instance 2 vlan 20 300 to 400 [LSW3-mst-region] active region-configuration [LSW3-mst-region] quit # 配置LSW4。 [LSW4] erps ring 1 [LSW4-erps-ring1] control-vlan 10 [LSW4-erps-ring1] protected-instance 1 [LSW4-erps-ring1] quit [LSW4] stp region-configuration [LSW4-mst-region] instance 1 vlan 10 100 to 200 [LSW4-mst-region] active region-configuration [LSW4-mst-region] quit [LSW4] erps ring 2 [LSW4-erps-ring2] control-vlan 20 [LSW4-erps-ring2] protected-instance 2 [LSW4-erps-ring2] quit [LSW4] stp region-configuration [LSW4-mst-region] instance 2 vlan 20 300 to 400 [LSW4-mst-region] active region-configuration [LSW4-mst-region] quit 3. 将二层端口加入ERPS环并配置端口角色，分别将LSW1的端口0/0/1和LSW2的端口0/0/2 配置为RPL owner。 # 配置LSW1。 [LSW1] interface gigabitethernet 0/0/1 [LSW1-GigabitEthernet0/0/1] stp disable [LSW1-GigabitEthernet0/0/1] erps ring 1 [LSW1-GigabitEthernet0/0/1] erps ring 2 rpl owner [LSW1-GigabitEthernet0/0/1] quit [LSW1] interface gigabitethernet 0/0/2 [LSW1-GigabitEthernet0/0/2] stp disable [LSW1-GigabitEthernet0/0/2] erps ring 1 [LSW1-GigabitEthernet0/0/2] erps ring 2 [LSW1-GigabitEthernet0/0/2] quit # 配置LSW2。 [LSW2] interface gigabitethernet 0/0/1 [LSW2-GigabitEthernet0/0/1] stp disable [LSW2-GigabitEthernet0/0/1] erps ring 1 [LSW1-GigabitEthernet0/0/1] erps ring 2 [LSW2-GigabitEthernet0/0/1] quit [LSW2] interface gigabitethernet 0/0/2 [LSW2-GigabitEthernet0/0/2] stp disable [LSW2-GigabitEthernet0/0/2] erps ring 1 rpl owner （被阻塞的端口） [LSW1-GigabitEthernet0/0/2] erps ring 2 [LSW2-GigabitEthernet0/0/2] quit # 配置LSW3。 [LSW3] interface gigabitethernet 0/0/1 [LSW3-GigabitEthernet0/0/1] stp disable [LSW3-GigabitEthernet0/0/1] erps ring 1 [LSW3-GigabitEthernet0/0/1] erps ring 2 [LSW3-GigabitEthernet0/0/1] quit [LSW3] interface gigabitethernet 0/0/2 [LSW3-GigabitEthernet0/0/2] stp disable [LSW3-GigabitEthernet0/0/2] erps ring 1 [LSW3-GigabitEthernet0/0/2] erps ring 2 [LSW3-GigabitEthernet0/0/2] quit # 配置LSW4。 [LSW4] interface gigabitethernet 0/0/1 [LSW4-GigabitEthernet0/0/1] stp disable [LSW4-GigabitEthernet0/0/1] erps ring 1 [LSW4-GigabitEthernet0/0/1] erps ring 2 [LSW4-GigabitEthernet0/0/1] quit [LSW4] interface gigabitethernet 0/0/2 [LSW4-GigabitEthernet0/0/2] stp disable [LSW4-GigabitEthernet0/0/2] erps ring 1 [LSW4-GigabitEthernet0/0/2] erps ring 2 [LSW4-GigabitEthernet0/0/2] quit 4. 配置ERPS环的Guard Timer和WTR Timer定时器。 # 配置LSW1。 [LSW1] erps ring 1 [LSW1-erps-ring1] wtr-timer 6 [LSW1-erps-ring1] guard-timer 100 [LSW1-erps-ring1] quit [LSW1] erps ring 2 [LSW1-erps-ring2] wtr-timer 6 [LSW1-erps-ring2] guard-timer 100 [LSW1-erps-ring2] quit # 配置LSW2。 [LSW2] erps ring 1 [LSW2-erps-ring1] wtr-timer 6 [LSW2-erps-ring1] guard-timer 100 [LSW2-erps-ring1] quit [LSW2] erps ring 2 [LSW2-erps-ring2] wtr-timer 6 [LSW2-erps-ring2] guard-timer 100 [LSW2-erps-ring2] quit # 配置LSW3。 [LSW3] erps ring 1 [LSW3-erps-ring1] wtr-timer 6 [LSW3-erps-ring1] guard-timer 100 [LSW3-erps-ring1] quit [LSW3] erps ring 2 [LSW3-erps-ring2] wtr-timer 6 [LSW3-erps-ring2] guard-timer 100 [LSW3-erps-ring2] quit # 配置LSW4。 [LSW4] erps ring 1 [LSW4-erps-ring1] wtr-timer 6 [LSW4-erps-ring1] guard-timer 100 [LSW4-erps-ring1] quit [LSW4] erps ring 2 [LSW4-erps-ring2] wtr-timer 6 [LSW4-erps-ring2] guard-timer 100 [LSW4-erps-ring2] quit 5. 配置LSW1～LSW4二层转发功能。 # 配置LSW1。 [LSW1] vlan batch 100 to 200 300 to 400 [LSW1] interface gigabitethernet 0/0/1 [LSW1-GigabitEthernet0/0/1] port trunk allow-pass vlan 100 to 200 300 to 400 [LSW1-GigabitEthernet0/0/1] quit [LSW1] interface gigabitethernet 0/0/2 [LSW1-GigabitEthernet0/0/2] port trunk allow-pass vlan 100 to 200 300 to 400 [LSW1-GigabitEthernet0/0/2] quit # 配置LSW2。 [LSW2] vlan batch 100 to 200 300 to 400 [LSW2] interface gigabitethernet 0/0/1 [LSW2-GigabitEthernet0/0/1] port trunk allow-pass vlan 100 to 200 300 to 400 [LSW2-GigabitEthernet0/0/1] quit [LSW2] interface gigabitethernet 0/0/2 [LSW2-GigabitEthernet0/0/2] port trunk allow-pass vlan 100 to 200 300 to 400 [LSW2-GigabitEthernet0/0/2] quit # 配置LSW3。 [LSW3] vlan batch 100 to 200 300 to 400 [LSW3] interface gigabitethernet 0/0/1 [LSW3-GigabitEthernet0/0/1] port trunk allow-pass vlan 100 to 200 300 to 400 [LSW3-GigabitEthernet0/0/1] quit [LSW3] interface gigabitethernet 0/0/2 [LSW3-GigabitEthernet0/0/2] port trunk allow-pass vlan 100 to 200 300 to 400 [LSW3-GigabitEthernet0/0/2] quit # 配置LSW4。 [LSW4] vlan batch 100 to 200 300 to 400 [LSW4] interface gigabitethernet 0/0/1 [LSW4-GigabitEthernet0/0/1] port trunk allow-pass vlan 100 to 200 300 to 400 [LSW4-GigabitEthernet0/0/1] quit [LSW4] interface gigabitethernet 0/0/2 [LSW4-GigabitEthernet0/0/2] port trunk allow-pass vlan 100 to 200 300 to 400 [LSW4-GigabitEthernet0/0/2] quit 6. 验证配置结果 上述配置成功后，执行以下操作，验证配置结果。以LSW2为例。 在LSW2上执行display erps，查看LSW2加入的ERPS环的端口和环的概要信息。 [LSW2] 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)GE0/0/1 (D,R)GE0/0/2 2 20 6 100 (D)GE0/0/1 (F)GE0/0/2 -------------------------------------------------------------------------------- 在LSW2上执行display erps verbose，查看LSW2加入的ERPS环的端口和环的详细信息。 [LSW2] display erps verbose Ring ID : 1 Description : Ring 1 Control Vlan : 10 Protected Instance : 1 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 -------------------------------------------------------------------------------- GE0/0/1 Common Forwarding Non-failed GE0/0/2 RPL Owner Discarding Non-failed Ring ID : 2 Description : Ring 2 Control Vlan : 20 Protected Instance : 2 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 : Pending 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 -------------------------------------------------------------------------------- GE0/0/1 Common Discarding Non-failed GE0/0/2 Common Forwarding Non-failed 配置文件 LSW1的配置文件 # sysname LSW1 # vlan batch 10 20 100 to 200 300 to 400 # stp region-configuration instance 1 vlan 10 100 to 200 instance 2 vlan 20 300 to 400 active region-configuration # 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 GigabitEthernet0/0/1 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 GigabitEthernet0/0/2 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 LSW2的配置文件 # sysname LSW2 # vlan batch 10 20 100 to 200 300 to 400 # stp region-configuration instance 1 vlan 10 100 to 200 instance 2 vlan 20 300 to 400 active region-configuration # 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 GigabitEthernet0/0/1 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 GigabitEthernet0/0/2 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 LSW3的配置文件 # sysname LSW3 # vlan batch 10 20 100 to 200 300 to 400 # stp region-configuration instance 1 vlan 10 100 to 200 instance 2 vlan 20 300 to 400 active region-configuration # 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 GigabitEthernet0/0/1 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 GigabitEthernet0/0/2 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 LSW4的配置文件 # sysname LSW4 # vlan batch 10 20 100 to 200 300 to 400 # stp region-configuration instance 1 vlan 10 100 to 200 instance 2 vlan 20 300 to 400 active region-configuration # 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 GigabitEthernet0/0/1 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 GigabitEthernet0/0/2 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 因篇幅问题不能全部显示，请点此查看更多更全内容