cisco 3560 hsrp 配置(免费)

interface Vlan9ip address 43.21.9.2 255.255.255.0no ip redirectsstandby ip 43.21.9.1standby priority 150standby preempt!interface Vlan10ip address 43.21.10.2 255.255.255.0no ip redirectsstandby ip 43.21.10.1standby priority 100standby preempt!//另一台6509的VLAN -------------------interface Vlan9ip address 43.21.9.3 255.255.255.0no ip redirectsstandby ip 43.21.9.1standby priority 100standby preempt!interface Vlan10ip address 43.21.10.3 255.255.255.0no ip redirectsstandby ip 43.21.10.1standby priority 150standby preempt//------------------------------第5章交换机HSRP配置『两台交换机主备的配置流程』通常一个网络内的所有主机都设置一条缺省路由，主机发往外部网络的报文将通过缺省路由发往该网关设备，从而实现了主机与外部网络的通信。

当该设备发生故障时，本网段内所有以此设备为缺省路由下一跳的主机将断掉与外部的通信。

HSRP就是为解决上述问题而提出的，它为具有多播或广播能力的局域网（如以太网）设计。

VRRP可以将局域网的一组交换机（包括一个Master即活动交换机和若干个Backup即备份交换机）组织成一个虚拟路由器，这组交换机被称为一个备份组。

虚拟的交换机拥有自己的真实IP地址（这个IP地址可以和备份组内的某个交换机的接口地址相同），备份组内的交换机也有自己的IP地址。

局域网内的主机仅仅知道这个虚拟路由器的IP地址（通常被称为备份组的虚拟IP地址），而不知道具体的Master交换机的IP地址以及Backup交换机的IP地址。

局域网内的主机将自己的缺省路由下一跳设置为该虚拟路由器的IP地址。

于是，网络内的主机就通过这个虚拟的交换机与其它网络进行通信。

当备份组内的Master交换机不能正常工作时，备份组内的其它Backup交换机将接替不能正常工作的Master交换机成为新的Master交换机，继续向网络内的主机提供路由服务，从而实现网络内的主机不间断地与外部网络进行通信。

Catalyst 3560 HSRP配置命令请见下表。

Command PurposeStep 1 configure terminal Enter global configurationmode.Step 2 interface interface-id Enter interface configuration mode, and enter the Layer 3 interface on which you want toenable HSRP.Step 3 standby [group-number] ip [ip-address [secondary]] Create (or enable) the HSRP group using its number and virtual IP address.• (Optional) group-number—The group number on the interface for whichHSRP is being enabled. The range is 0 to 255; the default is 0. If thereis only one HSRP group, you do not need to enter a group nu mber. • (Optionalon all but one interface) ip-address—The virtual IP address of the hotstandby router interface. You must enter the virtual IP address for atleast one of the interfaces; it can be learned on the other interfaces.• (Optional) secondary—The IP address is a secondary hot standby router interface. If neither router is designated as a secondary or standbyrouter and no priorities are set, the primary IP addresses are comparedand the higher IP address is the active router, with the next highest asthe standby router.Step 4 end Return to privileged EXEC mode.Step 5 show standby [interface-id [group]] Verify the configuration.Step 6 copy running-config startup-config (Optional)Save your entries in the configuration file.Command PurposeStep 1 configure terminal Enter global configurationmode.Step 2 interface interface-id Enter interface configuration mode, and enter the HSRP interface on which you want to set priority.Step 3 standby [group-number] priority priority [preempt [delay delay]] Set a priority value used in choosing the active router.The range is 1 to 255; the default priority is 100. The highest number represents the highest priority. • (Optional) group-number—The groupnumber to which the command applies. • (Optional) preempt—Select so thatwhen the local router has a higher priority than the active router, it assumes control as the active router. • (Op tional) delay—Set to cause the local router to postpone taking over the active role for the shown number of seconds. The range is 0 to 3600(1 hour); the default is 0 (no delay before taking over). Use the no form of the command to restore the default values.Step 4 standby [group-number] [priority priority] preempt [delay delay] Configure the router to preempt, which means that when the local router has a higher priority than the active router, it assumes control as the active router. • (O ptional) group-number—The group number to which the command applies. • (Optional) priority—Enter to set or change the group priority. The range is 1 to 255; the default is 100. • (Optional) delay—Set to cause the local router to postpone taking over the active role for the number of seconds shown. The range is 0 to 3600 (1 hour); the default is 0 (no delay before taking over). Use the no form of the command to restore the default values.Step 5 standby [group-number] track type number [interface-priority] Configure an interface to track other interfaces so that if one of the other interfaces goes down, the device's Hot Standby priority is lowered. • (Optional) group-number—The group number to which the command applies. • type—Enter the interface type (combined with interface number) that is tracked. • number—Enter the interface number (combined with interface type) that is tracked. • (Optional) interface-priority—Enter the amount by which the hot standby priority for the router is decremented or incremented when the interface goes down or comes back up. The default value is 10.Step 6 end Return to privileged EXEC mode.Step 7 show running-config Verify the configuration of the standby groups.Step 8 copy running-config startup-config (Optional) Save your entries in the configuration file【SwitchA相关配置】Switch# configure terminalSwitch(config)# interface VLAN 100Switch(config-if)# ip address 10.0.0.1 255.255.255.0Switch(config-if)# standby 1 ip 10.0.0.3Switch(config-if)# standby 1 priority 110Switch(config-if)# standby 1 preemptSwitch(config-if)# end【SwitchB相关配置】Switch# configure terminalSwitch(config)# interface VLAN100Switch(config-if)# ip address 10.0.0.2 255.255.255.0Switch(config-if)# standby 1 ip 10.0.0.3Switch(config-if)# standby 1 preemptSwitch(config-if)# end【补充说明】l 优先级的取值范围为0到255（数值越大表明优先级越高），但是可配置的范围是1到254。