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27-3
Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter 27 Hot Standby Router Protocol and Virtual Router Redundancy Protocol
How to Configure HSRP
The standby delay minimum reload interface configuration command delays HSRP groups from
initializing for the specified time after the interface comes up.
This command is different from the standby preempt delay interface configuration command, which
enables HSRP preemption delay. You can disable the preemptive scheme by using the no vrrp preempt
command. If preemption is disabled, the virtual router backup that is elected to become virtual router
master remains the master until the original virtual router master recovers and becomes master again.
How to Configure HSRP
This section contains the following procedures:
• Configuring HSRP
• Configuration Examples for HSRP
Configuring HSRP
Complete the following steps to configure HSRP:
Restrictions
• HSRP is supported only on IPv4 devices and not on IPv6 devices.
• HSRP is supported only gigabyte etherchannel interfaces of the Layer 3 SVI.
• Bidirectional Forwarding Detection (BFD) protocol is not supported.
SUMMARY STEPS
1. enable
2. configure terminal
3. interface type number
4. standby [group-number] ip [ip-address mask [secondary]]
5. standby [group-number] timers [msec] hellotime [msec] holdtime
6. standby [group-number] preempt [delay {minimum delay | reload delay | sync delay}]
7. standby [group-number] priority priority
8. standby [group-number] authentication text string
9. standby [group-number] track object-number [decrement priority-decrement]
10. end