Ip sla reaction-configure and reaction-trigger

Question

Hi all,
I want to make ipsla check server states to run EEM script then server will icmp timeout 3 times.
i writed the following configuration(CAT 6500 IOS 12.2).
ip sla 20 
 icmp-echo 172.31.3.206 source-ip 172.26.1.60
 timeout 100
 frequency 2
ip sla schedule 20 life 10 start-time pending
ip sla 30
 icmp-echo 172.31.3.206 source-ip 172.26.1.60
 timeout 100
 frequency 2
ip sla schedule 30 life forever start-time now
ip sla reaction-configuration 30 react timeout threshold-type consecutive 3 action-type trapandtrigger
ip sla reaction-trigger 30 20
track 20 ip sla 20 reachability
track 30 ip sla 30 reachability
but i found when ip sla 20 configured the ip sla status is unkonwn
SW#sh track 20
Track 20
  IP SLA 20 reachability
  Reachability is Down
    1 change, last change 00:00:17
  Latest operation return code: Unknown
  Tracked by:
    EEM applet server-down 
when server down,sla status will change to timeout,and eem will worked only once.
SW#sh track 20
Track 20
  IP SLA 20 reachability
  Reachability is Down
    1 change, last change 00:00:52
  Latest operation return code: Timeout
  Tracked by:
    EEM applet server-down 
When next time server up or down , the ip sla state will never changed, and the EEM never triggered.
So how to make it work?

Answer 1

To Dampen the restoration to ive used the following:
event EVENT_POOR_RADIO
event tag 1.0 ipsla operation-id 911 reaction-type packetMIA
event tag 1.2 ipsla operation-id 911 reaction-type packetLossDS
event tag 1.3 ipsla operation-id 911 reaction-type packetLossSD
trigger
  correlate event 1.0 or event 1.2 or event 1.3
  attribute tag 1.0 occurs 1
  attribute tag 1.2 occurs 1
  attribute tag 1.3 occurs 1
action 005   if $_ipsla_condition eq "Occurred"
action 010    cli command "enable"
action 015    cli command "configure term"
action 020    cli command "router ospf 20"
action 025    cli command "passive-interface GigabitEthernet0/0.10"
action 026    cli command "no event manager applet TIMER"
action 030   else
action 035    cli command "enable"
action 040    cli command "configure term"
action 045    cli command "event manager applet TIMER"
action 050    cli command "event timer countdown time 3600"
action 055    cli command "action 005 syslog msg $q PRIMARY PATH RESTORED$q"
action 060    cli command "action 010 cli command $q enable$q"
action 065    cli command "action 015 cli command $q configure term$q"
action 070    cli command "action 020 cli command $q router ospf 20 vrf SCADA$q"
action 075    cli command "action 025 cli command $q no passive-interface GigabitEthernet0/0.10$q"
action 080    cli command "action 030 cli command $q end$q"
action 085   end