What options to choose for Cisco SLA?

Question

Computer networks

There is a working Cisco 2921, sla is configured on it

ip sla auto discovery
ip sla 1
 icmp-echo 93.158.134.3 source-interface GigabitEthernet0/0
 threshold 1000
 timeout 1000
 frequency 20
ip sla schedule 1 life forever start-time now

But lately, there have been too many reports of a channel drop, I suspect that at such moments the treshold value is simply exceeded, but not the channel drop.
What values ​​would be best to set? Wouldn't it be overkill :
threshold 2000?
*Recently, the provider has often carried out "technical work" with yandex. I sin on this, but they do not recognize)))

Answer 1

This is how I did it, and it doesn't work at all. The only delay is big, but a minute is not critical for me,
because I have to not ping for a whole minute to go to the reserve, + monitoring on two sla at the same time (to avoid a situation when there are problems on a remote host)
track 1 ip sla 1 reachability
delay down 60 up 120
track 2 ip sla 2 reachability
delay down 60 up 120
track 100 list boolean or
object 1
object 2
ip sla 1
icmp-echo 4.2.2.2 source-ip xxxxxx
timeout 2000
frequency 15
ip sla schedule 1 life forever start-time now
ip sla 2
icmp-echo 8.8.8.8 source-ip xxxxxx
frequency 15
ip sla schedule 2 life forever start-time now
ip route 0.0.0.0 0.0.0.0 xx.xx.xx.xx 50 track 100
ip route 0.0.0.0 0.0.0.0 xx.xx.xx.xx 100

Answer 2

Have you considered checking "Internet presence" with http get if your IOS version supports it? ICMP, in my opinion, is not a fully-fledged member of the IP protocol family, it is often subject to policing (restriction) in the first place.