9.2: HSRP Overview Flashcards
Cisco provides ____ as a way to avoid losing outside network access if your default router fails.
HSRP and HSRP for IPv6
HSRP is a Cisco-proprietary FHRP that is designed to allow for transparent failover of a____
first-hop IP device
The role of the active and standby routers is determined during the HSRP ___
election process
True or False
By default, the router with the numerically highest IPv4 address is elected as the active router.
True
However, it is always better to control how your network will operate under normal conditions rather than leaving it to chance.
____can be used to determine the active router.
HSRP priority
The router with the _____(highest/lowest) HSRP priority will become the active router.
highest
By default, the HSRP priority is ___.
100
If the HSRP priorities are equal, the router with the numerically highest ___ is elected as the active router.
IPv4 address
To configure a router to be the active router, use the ___ interface command.
standby priority
The range of the HSRP priority is __.
0 to 255
True or False
By default, after a router becomes the active router, it will remain the active router unless another router comes online with a higher HSRP priority.
False
By default, after a router becomes the active router, it will remain the active router even if another router comes online with a higher HSRP priority.
To force a new HSRP election process to take place when a higher priority router comes online, preemption must be enabled using the ___ interface command.
standby preempt
___ is the ability of an HSRP router to trigger the re-election process.
Preemption
Preemption only allows a router to become the active router if it has a ___
higher priority.
True or false
A router enabled for preemption, with equal priority but a higher IPv4 address will not preempt an active router.
True
With preemption disabled, the router that ___first will become the active router if there are no other routers online during the election process.
boots up
A router can either be the active HSRP router responsible for forwarding traffic for the segment, or it can be a ___ router on standby, ready to assume the active role if the active router fails.
passive HSRP
HSRP STATES
1. This state is entered through a configuration change or when an interface first becomes available.
Initial
HSRP STATES
2. The router has not determined the virtual IP address and has not yet seen a hello message from the active router. In this state, the router waits to hear from the active router.
Learn
HSRP STATES
3. The router knows the virtual IP address, but the router is neither the active router nor the standby router. It listens for hello messages from those routers.
Listen
HSRP STATES
4. The router sends periodic hello messages and actively participates in the election of the active and/or standby router.
Speak
HSRP STATES
5. The router is a candidate to become the next active router and sends periodic hello messages.
Standby
HSRP STATES
6. The router won the election.
Active
The active and standby HSRP routers send hello packets to the HSRP group multicast address every ___ by default.
3 seconds
The standby router will become active if it does not receive a hello message from the active router after __.
10 seconds