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reth接口下添加三层的聚合接口，其它的配置与下方一样，注意三层的聚合接口不能跨框，属于同一个solt就行了。

1. 组网需求

·            如图2-5所示，Device A和Device B组成IRF，Device A和Device B分别用一个接口连接上行设备Device C，再分别用一个接口连接下行设备Device D。

·            Device C使用VLAN接口连接Device A和Device B，Device D也使用VLAN接口连接Device A和Device B。

·            正常情况下，流量走Device D——Device A——Device C；当这条通道上的任一链路或者设备故障时，流量切换到Device D——Device B——Device C。正常通道故障恢复时，流量再切回。

2. 组网图

图2-5 配置组网图

3. 配置步骤

如图2-5所示，配置各接口的IP地址、路由、安全域及域间安全策略，保证网络可达，具体配置过程略。

配置IRF

# 配置IRF端口1/2，并将它与物理端口GigabitEthernet1/0/3绑定，并保存配置。

<DeviceA> system-view

[DeviceA] interface GigabitEthernet 1/0/3

[DeviceA-GigabitEthernet1/0/3] shutdown

[DeviceA-GigabitEthernet1/0/3] quit

[DeviceA] irf-port 1/2

[DeviceA-irf-port1/2] port group interface GigabitEthernet 1/0/3

You must perform the following tasks for a successful IRF setup:

Save the configuration after completing IRF configuration.

Execute the "irf-port-configuration active" command to activate the IRF ports.

[DeviceA-irf-port1/2] quit

[DeviceA] interface GigabitEthernet 1/0/3

[DeviceA-GigabitEthernet1/0/3] undo shutdown

[DeviceA-GigabitEthernet1/0/3] quit

[DeviceA] save

[DeviceA] irf-port-configuration active

# 为确保Device A与Device B在主设备选举过程中，Device A为主，修改Device A成员优先级为2（成员优先级大的优先，缺省情况下，设备的成员优先级均为1）。

[DeviceA] irf member 1 priority 2

# 激活IRF端口下的配置。

[DeviceA] irf-port-configuration active

配置Device B

# 将Device B的成员编号配置为2，并重启设备使新编号生效。

<DeviceB> system-view

[DeviceB] irf member 1 renumber 2

Renumbering the member ID may result in configuration change or loss. Continue? [Y/N]:y

[DeviceB] quit

<DeviceB> reboot

# 参照图2-5进行物理连线，重新登录到Device B，配置IRF端口2/1，并将它与物理端口GigabitEthernet2/0/3绑定，并保存配置。

<DeviceB> system-view

[DeviceB] interface gigabitethernet 2/0/3

[DeviceB-GigabitEthernet2/0/3] shutdown

[DeviceB-GigabitEthernet2/0/3] quit

[DeviceB] irf-port 2/1

[DeviceB-irf-port2/1] port group interface GigabitEthernet 2/0/3

You must perform the following tasks for a successful IRF setup:

Save the configuration after completing IRF configuration.

Execute the "irf-port-configuration active" command to activate the IRF ports.

[DeviceB-irf-port2/1] quit

[DeviceB] interface GigabitEthernet 2/0/3

[DeviceB-GigabitEthernet2/0/3] undo shutdown

[DeviceB-GigabitEthernet2/0/3] quit

[DeviceB] save

# 激活IRF端口下的配置。

[DeviceB] irf-port-configuration active

配置以太网冗余接口

# 创建Reth1，IP地址为1.1.1.2/24，成员接口为GE1/0/1和GE2/0/1，其中GE1/0/1的优先级为255，GE2/0/1的优先级为50。

<DeviceA> system-view

[DeviceA] interface reth 1

[DeviceA-Reth1] ip address 1.1.1.2 24

[DeviceA-Reth1] member interface gigabitethernet 1/0/1 priority 255

[DeviceA-Reth1] member interface gigabitethernet 2/0/1 priority 50

[DeviceA-Reth1] quit

# 创建Reth2，IP地址为2.2.2.2/24，成员接口为GE1/0/2和GE2/0/2，其中GE1/0/2的优先级为255，GE2/0/2的优先级为50。

[DeviceA] interface reth 2

[DeviceA-Reth2] ip address 2.2.2.2 24

[DeviceA-Reth2] member interface gigabitethernet 1/0/2 priority 255

[DeviceA-Reth2] member interface gigabitethernet 2/0/2 priority 50

[DeviceA-Reth2] quit

配置Track，监测上、下行接口的物理状态。

[DeviceA] track 1 interface gigabitethernet 1/0/1 physical

[DeviceA-track-1] quit

[DeviceA] track 2 interface gigabitethernet 1/0/2 physical

[DeviceA-track-2] quit

[DeviceA] track 3 interface gigabitethernet 2/0/1 physical

[DeviceA-track-3] quit

[DeviceA] track 4 interface gigabitethernet 2/0/2 physical

[DeviceA-track-4] quit

配置冗余组

# 创建Node 1，Node 1和Device A绑定，为主节点。关联的Track项为1和2。

[DeviceA] redundancy group aaa

[DeviceA-redundancy-group-aaa] node 1

[DeviceA-redundancy-group-aaa-node1] bind slot 1

[DeviceA-redundancy-group-aaa-node1] priority 100

[DeviceA-redundancy-group-aaa-node1] track 1 interface gigabitethernet 1/0/1

[DeviceA-redundancy-group-aaa-node1] track 2 interface gigabitethernet 1/0/2

[DeviceA-redundancy-group-aaa-node1] quit

# 创建Node 2，Node 2和Device B绑定，为备节点。关联的Track项为3和4。

[DeviceA-redundancy-group-aaa] node 2

[DeviceA-redundancy-group-aaa-node2] bind slot 2

[DeviceA-redundancy-group-aaa-node2] priority 50

[DeviceA-redundancy-group-aaa-node2] track 3 interface gigabitethernet 2/0/1

[DeviceA-redundancy-group-aaa-node2] track 4 interface gigabitethernet 2/0/2

[DeviceA-redundancy-group-aaa-node2] quit

# 将Reth1和Reth2添加到冗余组中。

[DeviceA-redundancy-group-aaa] member interface reth 1

[DeviceA-redundancy-group-aaa] member interface reth 2

[DeviceA-redundancy-group-aaa] quit

配置会话热备

# 为确保当主成员设备故障，业务不中断地切到备成员设备，需配置会话热备功能。

[DeviceA] session synchronization enable

4. 验证配置

缺省情况下的显示信息

# 显示冗余组信息。可以看到优先级高的Node 1为主节点，Reth1和Reth2中优先级高的成员接口处于激活状态。

[DeviceA] display redundancy group aaa

Redundancy group aaa (ID 1):

  Node ID   Slot     Priority  Status       Track weight

  Node1     Slot1    100       Primary      255

  Node2     Slot2    50        Secondary    255

Preempt delay time remained   : 0    min

Preempt delay timer setting   : 1    min

Remaining hold-down time      : 0    sec

Hold-down timer setting       : 300  sec

Manual switchover request     : No

Member interfaces:

    Reth1          Reth2

Node 1:

  Track info:

    Track     Status        Reduced weight       Interface

    1         Positive      255                  GE1/0/1

    2         Positive      255                  GE1/0/2

Node 2:

  Track info:

    Track     Status        Reduced weight      Interface

    3         Positive      255                 GE2/0/1

    4         Positive      255                 GE2/0/2

# 显示Reth信息。可以看到Reth1和Reth2中优先级高的成员接口处于激活状态。

[DeviceA] display reth interface reth 1

Reth1 :

  Redundancy group  : aaa

  Member                Physical status         Forwarding status    Presence status

  GE1/0/1               UP                      Active               Normal

  GE2/0/1               UP                      Inactive             Normal

[DeviceA] display reth interface reth 2

Reth2 :

  Redundancy group  : aaa

  Member                Physical status         Forwarding status    Presence status

  GE1/0/2               UP                      Active               Normal

  GE2/0/2               UP                      Inactive             Normal

冗余组内主备倒换后的显示信息

# 手工关闭接口GE1/0/2，显示冗余组信息。可以看到优先级低的Node 2为主节点。

[DeviceA] interface gigabitethernet 1/0/2

[DeviceA-GigabitEthernet1/0/2] shutdown

[DeviceA-GigabitEthernet1/0/2] display redundancy group aaa

Redundancy group aaa (ID 1):

  Node ID   Slot     Priority  Status       Track weight

  Node1     Slot1    100       Secondary    -255

  Node2     Slot2    50        Primary      255

Preempt delay time remained   : 0    min

Preempt delay timer setting   : 1    min

Remaining hold-down time      : 0    sec

Hold-down timer setting       : 300  sec

Manual switchover request     : No

Member interfaces:

    Reth1          Reth2

Node 1:

  Track info:

    Track     Status       Reduced weight     Interface

    1         Negative     255                GE1/0/1

    2         Negative     255                GE1/0/2(Fault)

Node 2:

  Track info:

    Track     Status       Reduced weight     Interface

    3         Positive     255                GE2/0/1

    4         Positive     255                GE2/0/2

# 显示Reth的信息。Reth2下的接口GE1/0/2故障（DOWN），Reth1下的接口GE1/0/1被协议关闭（DOWN(redundancy down)）。GE2/0/1和GE2/0/2激活。

[DeviceA-GigabitEthernet1/0/2] display reth interface reth 1

Reth1 :

Redundancy group  : aaa

  Member                 Physical status         Forwarding status    Presence status

  GE1/0/1                DOWN(redundancy down)   Inactive             Normal

  GE2/0/1                UP                      Active               Normal

[DeviceA-GigabitEthernet1/0/2] display reth interface reth 2

Reth2 :

Redundancy group  : aaa

  Member                 Physical status         Forwarding status    Presence status

  GE1/0/2                DOWN                    Inactive             Normal

  GE2/0/2                UP                      Active               Normal