So...here I am ...with probably my last Tech post for year 2009...hmmm...somethings were good about this year and some were quite bad...good part was my new job...bad part was local traffic in this country and of course my Malaria infection around July this year...but in total...all is well that ends well :)
So today I am gonna show some IP SLA basics...which still looks like evil stuff to many more Network Engineers out there...My personal experience is it's neither easy nor that tough...The reason I said this because most of the IP SLA configurations are straight forward...but due to it's so many features and tools inside this cool IOS tool...sometimes it takes time to figure out what is going around...
One more thing I would like to mention before diving into configuration is that IP SLA (Service Level Agreement) was also called as SAA (Service Assurance Agent) and RTR (Response Time Reporter) in older IOS versions
So let's put IP SLA in action to fix this issue...we will use IP SLA to track reachability to R3's ethernet interface...the IP SLA instance will keep tracking this reachability and the moment it will loose reachability...it will decrement the HSRP priority for the current router by defined factor....So here is the sample config...
ip sla monitor 1
type echo protocol ipIcmpEcho 18.104.22.168
ip sla monitor schedule 1 life forever start-time now
track 1 rtr 1 reachability
ip address 10.0.0.3 255.255.255.0
standby 1 ip 10.0.0.1
standby 1 priority 105
standby 1 preempt
standby 1 track 1 decrement 50
router ospf 1
network 0.0.0.0 255.255.255.255 area 0
So happy new year in advance to all of you