Cisco Redundancy Technology

Cisco Redundancy Technology 1. vswitch Redundancy (1) engine Redundancy characteristics: www.2cto.com ① make RPR + a redundant protocol (Route Processor Redundancy Plus) ② the master and slave engines are in the starting status at the same time, however, only the master engine works. ③ the conversion time between the master and slave engines is 30 s to 60 s. ④ the Vlan database mode is not supported, however, in global mode, IOS versions running on the master and slave engines of ⑤ must be the same. During Master/Slave engine switching, dynamic routing information is lost, static Routing information is retained 7. The master and slave engines must be inserted into the first and second slots of the switch. The slave cannot configure the master and slave engines using the Branch cables (both engines are configured) (config) # redundancy default first slot for the master engine (config-red) # mode rpr-plus display redundancy status: show redundancy status www.2cto.com (Module redundancy) provides redundant modules (3) redundant power configuration: (config) # power redund Ancy-mode combined/redundantCombined: multiple power supplies work together Redundant: active power supply, standby power supply does not work // display power Supply Configuration: show power (4) Fan redundancy 2. HSRP hot backup routing protocol problem: if there are multiple routers (one as the master device and the other as the backup device), how do I configure the client Gateway? (Multiple gateways on a PC mean that the PC cannot determine whether the master router is available when multiple network segments are reached.) solution: configure the virtual router and set the IP address of the virtual router, as the redundancy of the client Gateway Router: virtual router (1) HSRP: hot backup routing protocol (2) HSRP Group: hot backup routing protocol Group (3) MAC composition of the virtual router: 109c07.ac ?? // Vendor C: vendor code // 07.ac: HSRP Protocol No //??: Group Number of the HSRP group (4) You can configure multiple real routers as multiple virtual routers (destination redundancy and load sharing) ⑸ HSRP status ① initial state HSRP not running ② learn state learning state vro did not receive the HELLO packet, do not know the vro IP // send the HELLO packet to each other, determine who is the main router, according to the priority election ③ listen state listening status the router does not receive the HELLO packet, know the vro④ IP ④ speak state to send the HELLO packet, select the encapsulation of the master router and the slave router // HELLO packet: status priority of the iPhone SRP of the HSRP group's group number HELLO packet sender HELLO packet sending time (3 S by default) (10 S) the IP address used for role-based virtual router switchover ⑤ standby state standby status Election of the standby Router ⑥ active state active status of the primary router normal operation of the primary and standby Router election: based on the priority in the HELLO packet, the value range is 0-255. The default value is 100. The larger the value, the better. Configure the router HSRP ① specify the virtual router IP (config-if) # standby group number ip vro② IP ② specify the priority (config-if) # standby group number priority ③ configure preemption (config-if) # standby group number preempt ④ configure the HELLO packet sending time and holding time (optional) (config-if) # standby group number timers sending time holding time ⑤ monitoring Link (config-if) # standby group number track detection link corresponding port priority // example of reducing the priority value based on the master link priority: standby 47 track s0 70 the actual priority is 150-70 = 80 6 debug # debug standby 3. server redundancy: the virtual server associates the core switch with the server cluster for configuration: ① configure the physical server group (config) # ip Server Load balancer serverfarm server group name (config-slb-sfarm) # real physical server IP address (config-slb-sfarm) # inservice // physical server IP address format: Real 10.1.1.1Real 10.1.1.2 ② configure Virtual Server (config) # ip slb vserver virtual server name (config-slb-vserver) # virtual ip Address Mask (③ associate a physical server group with a virtual server (config-slb-vserver) # serverfarm physical server group name (config-slb-vserver) # inservice HSRP experiment www.2cto.com configure the IP address and route information of each route and then add it to port f0/0 (config) of) # standby 47 ip 192.168.10.100 (config) # standby 47 priority 150 (config) # standby 47 preempt on port f0/0 (config) of C) # standby 47 ip 192.168.10.100 // priority: 100 by default, the gateway is set on the PC: 192.168.10.100. If the IP address is the vro, the gateway is set to ip default-gateway 192.168.10.100.