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25 Cards in this Set
- Front
- Back
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Is HSRP Cisco-proprietary or an open standard?
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Cisco-proprietary
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What is the HSRP Hello multicast address?
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224.0.0.2
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What is the HSRP Hello message protocol and port?
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UDP 1985
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What is the HSRP Virtual gateway MAC address?
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0000.0C07.ACxx
“xx” = HSRP Group number |
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What is the HSRP Group number range?
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0 - 255
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How many unique groups can typically be assigned per switch?
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16 UNIQUE groups (more than 16 total groups are allowed if each group is the same per VLAN)
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How are HSRP routers elected?
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Priority value
highest = preferred |
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Describe HSRP Interface Tracking.
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Tracks an interface and will change the router’s HSRP Priority by a set value (leading to a new election).
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What is HSRP Preemption?
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It can be configured so a router takes over if the Active Router has a lower priority
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Does HSRP preempt by default?
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No
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What is the HSRP Priority range and default?
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0 to 255
Default is 100 |
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What is the HSRP priority tie-breaker?
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Highest IP address
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What are the five HSRP States?
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ILSSA
2. Init - HSRP is not running 3. Listen - Router does NOT know the virtual IP and is waiting to hear from Active 4. Speak - Router sends HSRP Hellos and participates in the election 5. Standby - Router monitors Hellos from Active 6. Active - Router forwards packets on behalf of virtual router |
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What is the HSRP Active State?
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The primary HSRP router that currently forwards packets for the virtual router and has the highest Priority.
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What is the HSRP Standby State?
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The secondary HSRP router; has the second-highest Priority
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What is the HSRP Listen State?
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The router knows the IP and MAC of the virtual router, but is not the Active or Standby router.
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In which three HSRP states do routers send hello messages?
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Speak
Standby Active |
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What is the default HSRP Hello Timer?
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3 seconds
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What is the HSRP holdtime timer used for?
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If Hellos are missed for the duration of the holdtime timer, the active router is presumed to be down.
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What is the default HSRP Holddown Timer?
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10 seconds
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What is the root HSRP command?
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standby <group>
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What are the two HSRP authentication methods?
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Plain-text
MD5 |
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How can you load balance with HSRP?
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Create multiple groups on a subnet. One group is active for a portion of the network and standby for the other. The other group is standby for a portion and active for the other.
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What is the command to enable HSRP preemption?
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standby <group> preempt
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If not specified in the "standby" command, what group will HSRP use by default?
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0
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