track ip sla with & without "state"

Hi guys,

i'm confused by the "state" statement. what's the difference between

 

track 1 ip sla 1 and track 1 ip sla 1 state

 

Cisco says: state (Optional) Tracks the operation return code.

i'm using icmp-echo to test. seems no matter the "state" is present or not, the ip sla will inform the track once the link is down.

so even i dont add the "state" the icmp-echo timeout return code will still be returned back to the "track".

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