cisco 400-051 dumps

cisco 400-051 dumps.. Other HSRP routing devices. A virtual routing device provides an RP that is always available to the endpoint, it is not a true RP because the IP address and MAC address of the virtual RP are not assigned to the interface of the routing device in the broadcast domain. oThe active routing device and the standby routing device are elected based on the priority of the routing devices in the HSRP group. The routing device with the highest priority is elected as the active routing device, while the routing device with the next highest priority is elected as the standby routing device. If the priorities are the same, the deadlock is broken based on the IP address of the routing device. In this case, the routing device with the larger IP address is elected to the appropriate role.The active routing device is responsible for forwarding all traffic sent to the MAC address of the virtual routing device. Another device is elected as the standby routing device, and it monitors the active routing device by paying attention to HSRP multicast messages (HSRPHello messages). The active routing device generates a Hello message every 3 seconds; if the standby routing device does not receive a Hello message from the active routing device within 10 seconds, the standby routing device elevates itself and begins performing the functions of the active routing device. Like the active routing device, the standby routing device announces itself every 3 seconds so that if it fails, another router in the HSRP group will act as the standby routing device.The other routing devices in the HSRP group (if any) listen to the Hello multicast sent by the standby and active routing devices to confirm that they are assuming their respective roles. When the active routing device fails, endpoints see no different situation; they still send frames to the virtual MAC address; however, in this case, the standby routing device will begin processing frames sent to the virtual MAC address, and another router in the HSRP group will be elected as the standby routing device.If an endpoint sends frames to the actual MAC address of a routing device in the broadcast domain, such frames will all be processed and forwarded by that routing device (regardless of whether it is the active, standby, or other routing device).HSRP Multicast; Shaw RestInitially, to determine which routing devices will become active and standby routing devices, all routing devices in an HSRP group send out HSRP multicast messages. This message is a UDP message that uses port number 1985, a destination address that represents the multicast address of all routers (224.0.0.1), and a time-to-live (TTL) of 1. Setting the TTL to 1 prevents the running multicast routing protocol from forwarding the message to other subnets. HSRP messages contain the following information.. HSRP version number. . An opcode indicating the message type.. Hello messages: these messages are used by routing devices for election and are used by the elected active and alternate routing devices.. Resignation messages: these messages are used when the RP no longer wants to perform the functions of the active RP.