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Difference in RTT values for icmp & tcpconnect ip sla for the same destination

Hi All,

In my organization we are using icmp ip sla and tcp-connect ip sla for same destination. But we are getting different RTT. Anyone can please let us know what will be the reason. I have mentioned the configurations below. We are using cisco WS-C6506-E layer 3 switch.

tcp-connect configuration

ip sla 5
 tcp-connect 62.6.248.45 443 source-ip 10.84.30.3 control disable
 timeout 2000
 frequency 30
ip sla schedule 5 life forever start-time now
 

icmp configuration

ip sla 7
 icmp-echo 62.6.248.45 source-ip 10.84.30.3
 frequency 10
ip sla schedule 7 life forever start-time now

--------------------------------------------------------------------------

ip sla statitics results.

 

For tcp-connect

Core-Sw2#sh ip sla statistics 7
Round Trip Time (RTT) for       Index 7
Type of operation: icmp-echo
        Latest RTT: 267 ms
Latest operation start time: *07:27:31.672 UTC Tue Jun 2 2015
Latest operation return code: OK
Number of successes: 101
Number of failures: 0
Operation time to live: Forever

 

For icmp ip sla

Core-Sw2#sh ip sla statistics 5
Round Trip Time (RTT) for       Index 5
Type of operation: tcpConnect
        Latest RTT: 4 ms
Latest operation start time: *07:18:07.273 UTC Tue Jun 2 2015
Latest operation return code: OK
Number of successes: 101
Number of failures: 1
Operation time to live: Forever
 

 

 

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