CCNP 3 Implementing High Availability in a Campus Environment

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Configuring Layer 3 Redundancy with HSRP

Describing Routing Issues

Default gateway fails
Standby takes over

Identifying the Router Redundancy Process

Virtual Router
Standby takes over

Describing HSRP

An HSRP group consists of the following:

  • Active router
  • Standby router
  • Virtual router
  • Other routers



HSRP active and standby routers send hello messages to the multicast address 224.0.0.2 using UDP port 1985.

Identifying HSRP Operations

HSRP operation
HSRP operation
HSRP operation
HSRP operation

Describing HSRP States

HSRP States
HSRP State Descriptions
HSRP State Descriptions

Describing HSRP Configuration Commands

HSRP Configuration Commands
HSRP Configuration Commands
HSRP Configuration Commands

Optimizing HSRP

Describing HSRP Optimization Options

These options can be configured to optimize HSRP:

  • Standby Priority
  • Standby Preempt
  • Message Timers
  • Interface Tracking
HSRP Standby Priority
HSRP Stanby Preempt
HSRP Stanby Timers
HSRP Tracking
interface vlan 10
 ip address 10.0.0.2 255.255.255.0
 standby 1 ip 10.0.0.1
 standby 1 priority 150
 standby 1 preempt
 standby 1 track GigabitEthernet 0/1 50
 
interface vlan 10
 ip address 10.0.0.3 255.255.255.0
 standby 1 ip 10.0.0.1
 standby 1 priority 100
 standby 1 preempt
 standby 1 track GigabitEthernet 0/1 50
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