IP SLA Option ?

[usmansa1]

Hi,

I am looking to implement ip-sla with HSRP. My requirement is to trigger the fail-over if at-least three packets are lost. For example if the track IP configured is 8.8.8.8 then the threshold should be triggered only if at-least three packets are lost towards 8.8.8.8. I am trying to figure out the way but couldn't find any option. I am using C860-UNIVERSALK9-M. Can any one help me

[Deepak Kumar]

Hi,

This is a duplicate post. 

Your Configuration will be like:

R1(config)# ip sla 1
R1(config)# icmp-echo 8.8.8.8 source-interface XXXXX
R1(config)# timeout 1000
R1(config)# threshold 3
R1(config)# frequency 2

The ICMP Echo probe sends an ICMP Echo packet to next-hop IP 8.8.8.8 every 2 seconds, as defined by the “frequency” parameter.

Timeout sets the amount of time (in milliseconds) for which the Cisco IOS IP SLAs operation waits for a response from its request packet.

Threshold sets the rising threshold that generates a reaction event.

[usmansa1]

Thanks Deepak, By mistake I have added two posts. But your answer does not have any option which shows that the reaction will be after three consecutive packet loss. 

[Deepak Kumar]

Hi,

Check the threshold option. It means if three counties packet will not get a reply then the system will trigger the event. 

[usmansa1]

Thanks Deepak , Now I realized what do you mean. Let me test it and I will accept it as solution. Thank you

[usmansa1]

I specifically need that when three consecutive packets are lost then the reaction occurs. 

[Leo Laohoo]

Duplicate thread

https://community.cisco.com/t5/network-management/ip-sla-option-for-lost-packets-threshold/m-p/3840811

[Mohammed al Baqari]

Here is an example You can use other sla operations such as udp jitter or
other icmp.

R1#
Interface FastEthernet0/0
ip address 192.168.12.1 255.255.255.0
standby 1 ip 192.168.12.3
standby 1 preempt
!
interface FastEthernet0/1
ip address 192.168.13.1 255.255.255.0
!
ip route 0.0.0.0 0.0.0.0 192.168.13.3R2#
interface FastEthernet0/0
ip address 192.168.12.2 255.255.255.0
standby preempt
standby 1 ip 192.168.12.3
standby 1 priority 90
standby 1 preempt
!
interface FastEthernet0/1
ip address 192.168.23.2 255.255.255.0
!
ip route 0.0.0.0 0.0.0.0 192.168.23.3

R1#
ip sla monitor 1
type echo protocol ipIcmpEcho 3.3.3.3
frequency 5
ip sla monitor schedule 1 life forever start-time now
!
track 1 rtr 1 reachability
!
interface FastEthernet0/0
standby 1 track 1 decrement 20

*** Remember to rate useful posts