To test the traffic shifting, we need to shutdown gigabitEthernet 0/1 interface in RTR-01. Tracing route to 8.8.8.8 over a maximum of 30 hops Standby router is 10.1.1.3, priority 110 (expires in 11.440 sec)ġ state change, last state change 00:00:48Īctive router is 10.1.1.2, priority 150 (expires in 8.928 sec) Local virtual MAC address is 01 (v1 default)
RTR-01#show standbyĢ state changes, last state change 00:02:42Īctive virtual MAC address is 01 We can verify our configuration by using show standby command. RTR-01(config-if)# RTR-02(config)#interface gigabitEthernet 0/1 RTR-01(config)#interface gigabitEthernet 0/1 We need to configure this on LAN interfaces. In the final configuration section, we need to specify the virtual IP address and its priority. RTR-01(config-if)#no shutdown RTR-02(config)#interface gigabitEthernet 0/1 Here is the ip addressing on LAN interfaces. RTR-02(config-if)#ip add 59.152.100.2 255.255.255.252īefore configuring the LAN interfaces, make sure you have minimum /29 IP address block. RTR-02(config)#interface gigabitEthernet 0/0 RTR-01(config)# RTR-02#configure terminal RTR-01(config)#interface gigabitEthernet 0/0 IRDP allows IPv4 hosts to locate routers that provide IPv4 connectivity to other (nonlocal) IP networks.Enter configuration commands, one per line. ICMP Router Discovery Protocol (IRDP) - Specified in RFC 1256, is a legacy FHRP solution.Multiple first-hop routers on the LAN combine to offer a single virtual first-hop IPv6 router while sharing the IPv6 packet forwarding load. GLBP for IPv6 provides automatic router backup for IPv6 hosts configured with a single default gateway on a LAN. GLBP for IPv6 - Cisco-proprietary FHRP providing the same functionality of GLBP, but in an IPv6 environment.Gateway Load Balancing Protocol (GLBP) - Cisco-proprietary FHRP that protects data traffic from a failed router or circuit, like HSRP and VRRP, while also allowing load balancing (also called load sharing) between a group of redundant routers.VRRPv3 works in multi-vendor environments and is more scalable than VRRPv2. VRRPv3 - Provides the capability to support IPv4 and IPv6 addresses.In a VRRP configuration, one router is elected as the virtual router master, with the other routers acting as backups, in case the virtual router master fails.
A VRRP router is configured to run the VRRP protocol in conjunction with one or more other routers attached to a LAN. This allows several routers on a multiaccess link to use the same virtual IPv4 address.
When the group becomes inactive these RAs stop after a final RA is sent. Periodic router advertisements (RAs) are sent for the HSRP virtual IPv6 link-local address when the HSRP group is active. An HSRP IPv6 group has a virtual MAC address derived from the HSRP group number and a virtual IPv6 link-local address derived from the HSRP virtual MAC address. HSRP for IPv6 - Cisco-proprietary FHRP providing the same functionality of HSRP, but in an IPv6 environment.The function of the HSRP standby router is to monitor the operational status of the HSRP group and to quickly assume packet-forwarding responsibility if the active router fails. In a group of device interfaces, the active device is the device that is used for routing packets the standby device is the device that takes over when the active device fails, or when pre-set conditions are met. HSRP is used in a group of routers for selecting an active device and a standby device. HSRP provides high network availability by providing first-hop routing redundancy for IPv4 hosts on networks configured with an IPv4 default gateway address. Hot Standby Router Protocol (HSRP) - A Cisco-proprietary FHRP designed to allow for transparent failover of a first-hop IPv4 device.The following list defines the options available for First Hop Redundancy Protocols (FHRPs), as shown in the figure.