IRF简书以及使用H3C模拟器HCL完成基础的IRF实施

第1部分 IRF简书

1.什么是IRF

硬件虚拟化IRF（智能弹性框架）带来的优势：组网简化：如下图所示，传统的3层架构，核心交换机之间使用了以太捆绑，和接入层交换机运行STP，此时导致接入交换机之间只有部分处于转发状态（可以通过MSTP调整优化不同VLAN间的数据转发）。在实施IRF之后2台核心交换之间实施硬件虚拟化，被视为一台设备。这大大的简化了网络的复杂性。汇聚层的多个设备成为了一个单一的逻辑设备，接入设备直接连接到这个虚拟设备。这种简化后的组网不再需要使用MSTP、VRRP协议，简化了网络配置。同时依靠跨设备的链路聚合（需要特定设备支持），在成员出现故障时不再依赖MSTP、VRRP等协议的收敛，提高了可靠性

2.IRF的成员组成和接口类型

IRF堆叠中的成员设备分为Master和Slave设备
成员设备上用于堆叠连接的物理接口称之为物理堆叠口
物理堆叠口需要和逻辑堆叠口绑定，逻辑堆叠口简称为堆叠口
由多个物理堆叠口聚合的堆叠口成为聚合堆叠口

3. IRF拓扑和拓扑发现

IRF堆叠物理拓扑：链形拓扑和环形拓扑

堆叠设备通过和直连的其他成员交互IRF Hello来收集整个堆叠的拓扑信息
拓扑收集完毕进入角色选举过程

第2部分 IRF实施案例

2.1实施拓扑：

步骤1. 确定IRF设备角色，配置设备的IRF优先级和编号

[IRF2]irf member 1 renumber 2 //将IRF2(即SW2)的成员编号设置为2，默认为1Renumbering the member ID may result in configuration change or loss. Continue?[Y/N]:y //对成员1中的背板重编号必须可能导致配置改变或者丢弃，是否继续？是[IRF2]save //切记保存配置The current configuration will be written to the device. Are you sure? [Y/N]:y //确定保存Please input the file name(*.cfg)[flash:/startup.cfg](To leave the existing filename unchanged, press the enter key): //使用默认的配置名称，即start.cfgValidating file. Please wait...Saved the current configuration to mainboard device successfully.[IRF2]quitreboot //必须重启设备Start to check configuration with next startup configuration file, please wait.........DONE!This command will reboot the device. Continue? [Y/N]:y //该命令将重启设备，继续么？确认继续Now rebooting, please wait...%Nov 25 22:02:11:207 2018 IRF2 DEV/5/SYSTEM_REBOOT: System is rebooting now.！！[H3C]sysname IRF1[IRF1]irf member 1 priority 32 //设置IRF1（SW1）的IRF优先级为32，该值已经最大，保证IRF1设备成为主设备（IRF2并未修改优先级，意味着它使用默认的优先级1）[IRF1]int r te 1/0/50 to t 1/0/51[IRF1-if-range]shu //把交换机互联接口关闭，这是必须的一部[IRF1-if-range]quit[IRF1]irf-port 1/2 //设置IRF1的逻辑接口2[IRF1-irf-port1/2]port g int te 1/0/50 //把物理接口加入逻辑接口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.[IRF1-irf-port1/2]port g int te 1/0/51 //把物理接口加入逻辑接口[IRF1-irf-port1/2]quit[IRF1]int r te 1/0/50 to t 1/0/51[IRF1-if-range]un sh //开启物理接口

步骤2. Slave设备加入物理成员接口

[IRF2]int r t 2/0/50 to t 2/0/51 //进入物理接口，注意之前已经"renember"了该设备的板卡号码，所以接口为10G接口的2/0/50和51接口[IRF2-if-range]shu //IRF2设备重启后关闭物理接口[IRF2-if-range]quit[IRF2]irf-port 2/1 //注意，特别推荐使用交叉互联，请对比IRF1设备，否则可能造成堆叠失败[IRF2-irf-port2/1]port g int t 2/0/50 //把物理接口加入逻辑接口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.[IRF2-irf-port2/1]port g int t 2/0/51 //把物理接口加入逻辑接口[IRF2-irf-port2/1]quit[IRF2]int r t 2/0/50 to t 2/0/51[IRF2-if-range]un shu //开启物理接口%Nov 25 22:06:39:426 2018 IRF2 IFNET/3/PHY_UPDOWN: Physical state on the interface Ten-GigabitEthernet2/0/50 changed to up.%Nov 25 22:06:39:474 2018 IRF2 IFNET/5/LINK_UPDOWN: Line protocol state on the interface Ten-GigabitEthernet2/0/50 changed to up.%Nov 25 22:06:39:495 2018 IRF2 LLDP/6/LLDP_CREATE_NEIGHBOR: Nearest bridge agent neighbor created on port Ten-GigabitEthernet2/0/50 (IfIndex 179), neighbor's chassis ID is 90c6-26d7-0100, port ID is Ten-GigabitEthernet1/0/50.%Nov 25 22:06:39:648 2018 IRF2 IFNET/3/PHY_UPDOWN: Physical state on the interface Ten-GigabitEthernet2/0/51 changed to up.[IRF2-if-range]%Nov 25 22:06:39:659 2018 IRF2 IFNET/5/LINK_UPDOWN: Line protocol state on the interface Ten-GigabitEthernet2/0/51 changed to up.%Nov 25 22:06:39:663 2018 IRF2 LLDP/6/LLDP_CREATE_NEIGHBOR: Nearest bridge agent neighbor created on port Ten-GigabitEthernet2/0/51 (IfIndex 180), neighbor's chassis ID is 90c6-26d7-0100, port ID is Ten-GigabitEthernet1/0/51.[IRF2]save //保存配置The current configuration will be written to the device. Are you sure? [Y/N]:y //确定保存配置Please input the file name(*.cfg)[flash:/startup.cfg](To leave the existing filename unchanged, press the enter key):flash:/startup.cfg exists, overwrite? [Y/N]:y //确定覆盖已经存在的配置Validating file. Please wait...Saved the current configuration to mainboard device successfully.save //保存配置The current configuration will be written to the device. Are you sure? [Y/N]:yPlease input the file name(*.cfg)[flash:/startup.cfg](To leave the existing filename unchanged, press the enter key):Validating file. Please wait...Saved the current configuration to mainboard device successfully.

此时2台设备的IRF已经配置完毕，但不激活IRF之前，IRF并不工作

步骤3.激活IRF配置

[IRF1]irf-port-configuration active //请在激活IRF配置前确保已经保存配置[IRF1]%Nov 25 22:08:28:132 2018 IRF1 STM/6/STM_LINK_UP: IRF port 2 came up.%Nov 25 22:08:45:321 2018 IRF1 STM/4/STM_MERGE: IRF merge occurred.%Nov 25 22:08:47:660 2018 IRF1 IFNET/3/PHY_UPDOWN: Physical state on the interface Ten-GigabitEthernet1/0/51 changed to down.%Nov 25 22:08:47:668 2018 IRF1 IFNET/5/LINK_UPDOWN: Line protocol state on the interface Ten-GigabitEthernet1/0/51 changed to down.%Nov 25 22:08:49:594 2018 IRF1 STM/3/STM_LINK_DOWN: IRF port 2 went down.%Nov 25 22:08:49:606 2018 IRF1 IFNET/3/PHY_UPDOWN: Physical state on the interface Ten-GigabitEthernet1/0/50 changed to down.%Nov 25 22:08:49:612 2018 IRF1 IFNET/5/LINK_UPDOWN: Line protocol state on the interface Ten-GigabitEthernet1/0/50 changed to down.[IRF1][IRF2]%Nov 25 22:08:46:254 2018 IRF2 STM/6/STM_LINK_UP: IRF port 1 came up.//已经重启system-view //在IRF设备重启后，暂时不会完成立即IRF，此时依旧显示"IRF2"System View: return to User View with Ctrl+Z.[IRF2]int r t 2/0/50 to t 2/0/51[IRF2-if-range]shu[IRF2-if-range]und shu //重新关闭关闭，开启物理接口。此时可能已经重启 

启动后，如果成功那么IRF2会变成IRF1
步骤4，IRF实施完毕后的验证

[IRF1]display irfMemberID    Role    Priority  CPU-Mac         Description *+1        Master  32        90c6-26d7-0104  ---   2        Standby 1         90c6-2ea5-0204  ----------------------------------------------------- * indicates the device is the master. + indicates the device through which the user logs in. The bridge MAC of the IRF is: 90c6-26d7-0100 Auto upgrade                : yes Mac persistent              : 6 min Domain ID                   : 0[IRF1]dis irf linkMember 1 IRF Port  Interface                             Status 1         disable                               -- 2         Ten-GigabitEthernet1/0/50             UP           Ten-GigabitEthernet1/0/51             UPMember 2 IRF Port  Interface                             Status 1         Ten-GigabitEthernet2/0/50             UP           Ten-GigabitEthernet2/0/51             DOWN 2         disable                               --[IRF1]dis irf topology                              Topology Info -------------------------------------------------------------------------               IRF-Port1                IRF-Port2 MemberID    Link       neighbor      Link       neighbor    Belong To 1           DIS        ---           UP         2           90c6-26d7-0104 2           UP         1             DIS        ---         90c6-26d7-0104[IRF1]dis irf conf MemberID NewID    IRF-Port1                     IRF-Port2 1        1        disable                       Ten-GigabitEthernet1/0/50                                                 Ten-GigabitEthernet1/0/51 2        2        Ten-GigabitEthernet2/0/50     disable                   Ten-GigabitEthernet2/0/51

chassis convert mode irf //切换到IRF工作模式（模拟器不支持）
其他厂商还支持VSS、CSS等类似技术，敬请期待乾颐堂安德培训和课程（QCNA、QCIE）