由于网络规模迅速扩大,当前中心交换机(Device A)转发能力已经不能满足需求,需要另外增加一台设备Device B。现需要将两台设备配置IRF2堆叠,将网络转发能力提高一倍,并实现网络易管理、易维护。Device A和Device B分别使用自带的两个万兆口做堆叠口。也可以只用一个接口堆叠,根据实际情况而定。
Device A保留缺省编号为1,不需要进行配置。同时,在Device B上将设备的成员编号修改为2。
<DeviceB> system-view
[DeviceB] irf member 1 renumber 2
Warning: Renumbering the switch number may result in configuration change or loss. Continue? [Y/N]:y
[DeviceB]
将两台设备断电后,按组网图所示连接IRF链路,然后将两台设备上电。在Device A上创建设备的IRF端口2,与物理端口Ten-GigabitEthernet1/0/25、 Ten-GigabitEthernet1/0/26绑定,并保存配置。
<DeviceA> system-view
[DeviceA] interface ten-gigabitethernet 1/0/25
[DeviceA-Ten-GigabitEthernet1/0/25] shutdown
[DeviceA-Ten-GigabitEthernet1/0/25] quit
[DeviceA] interface ten-gigabitethernet 1/0/26
[DeviceA-Ten-GigabitEthernet1/0/26] shutdown
[DeviceA-Ten-GigabitEthernet1/0/26] quit
[DeviceA] irf-port 1/2
[DeviceA-irf-port1/2] port group interface ten-gigabitethernet1/0/25
[DeviceA-irf-port1/2] port group interface ten-gigabitethernet1/0/26
[DeviceA-irf-port1/2] quit
[DeviceA] interface ten-gigabitethernet 1/0/25
[DeviceA-Ten-GigabitEthernet1/0/25] undo shutdown
[DeviceA-Ten-GigabitEthernet1/0/25] quit
[DeviceA] interface ten-gigabitethernet 1/0/26
[DeviceA-Ten-GigabitEthernet1/0/26] undo shutdown
[DeviceA-Ten-GigabitEthernet1/0/26] quit
[DeviceA] save force
在Device B上创建设备的IRF端口1,与物理端口Ten-GigabitEthernet2/0/25、Ten-GigabitEthernet2/0/26绑定,并保存配置。
<DeviceB> system-view
[DeviceB] interface ten-gigabitethernet 2/0/25
[DeviceB-Ten-GigabitEthernet2/0/25] shutdown
[DeviceB-Ten-GigabitEthernet2/0/25] quit
[DeviceB] interface ten-gigabitethernet 2/0/26
[DeviceB-Ten-GigabitEthernet2/0/26] shutdown
[DeviceB-Ten-GigabitEthernet2/0/26] quit
[DeviceB] irf-port 2/1
[DeviceB-irf-port2/1] port group interface ten-gigabitethernet2/0/25
[DeviceB-irf-port2/1] port group interface ten-gigabitethernet2/0/26
[DeviceB-irf-port2/1] quit
[DeviceB] interface ten-gigabitethernet 2/0/25
[DeviceB-Ten-GigabitEthernet2/0/25] undo shutdown
[DeviceB-Ten-GigabitEthernet2/0/25] quit
[DeviceB] interface ten-gigabitethernet 2/0/26
[DeviceB-Ten-GigabitEthernet2/0/26] undo shutdown
[DeviceB-Ten-GigabitEthernet2/0/26] quit
[DeviceB] save force
激活DeviceA的IRF端口配置。
[DeviceA] irf-port-configuration active
激活DeviceB的IRF端口配置。
[DeviceB] irf-port-configuration active
两台设备间将会进行Master竞选,竞选失败的一方将自动重启,重启完成后,IRF形成,系统名称统一为DeviceA
IRF设备一旦分裂,会变成两台配置完全相同的设备,导致业务转发有问题。为了避免此类问题出现,可以配置分裂检测。设备一旦检测到IRF2分裂,则自动关闭备设备的所有非保留端口。在此介绍BFD MAD分裂检测配置方法。使用网线Device A上的端口GigabitEthernet1/0/1和Device B上的端口GigabitEthernet2/0/1连接起来。
创建VLAN 3,并将Device A上的端口GigabitEthernet1/0/1和Device B上的端口GigabitEthernet2/0/1加入VLAN中。
<DeviceA> system-view
[DeviceA] vlan 3
[DeviceA-vlan3] port gigabitethernet 1/0/1 gigabitethernet 2/0/1
[DeviceA-vlan3] quit
创建VLAN接口3,并配置MAD IP地址。
[DeviceA] interface vlan-interface 3
[DeviceA-Vlan-interface3] mad bfd enable
[DeviceA-Vlan-interface3] mad ip address 192.168.2.1 24 member 1
[DeviceA-Vlan-interface3] mad ip address 192.168.2.2 24 member 2
[DeviceA-Vlan-interface3] quit
按组网图所示连接BFD MAD链路。
因为BFD MAD和生成树功能互斥,所以在GigabitEthernet1/0/1和GigabitEthernet2/0/1上关闭生成树协议。
[DeviceA] interface gigabitethernet 1/0/1
[DeviceA-Gigabitethernet1/0/1] undo stp enable
[DeviceA-Gigabitethernet1/0/1] quit
[DeviceA] interface gigabitethernet 2/0/1
[DeviceA-Gigabitethernet2/0/1] undo stp enable
1)IRF-port端口编号说明,irf-port 1/2中,第一个数字代表的是设备成员编号,第二个数字是接口编号。堆叠要求使用逻辑端口1对接逻辑端口2。即,如若第一台配置irf-port1/2,则第二台需要是用irf-port2/1对接。如若第一台使用irf-port1/1,则第二台需要配置irf-port2/2。
2)设备配置好IRF2配置后,要先保存再激活配置。