Perl telnet to cisco router and compare the ping ms

Shell Programming and Scripting
1

All
Please help, i will telnet to router to obain the ping status and compare, if higher than normal latency, i will have further action..

if i do the telent and in perl script then ....

e.g the result i obtain from the router will be =' Success rate is 100 percent (5/5), round-trip min/avg/max = 140/140/141 ms'

and the xxxx/140/xxxx ms , while i only concern the average one = 140ms. How can I read the value in the middle of the '/'line, sometimes will be 2 digit , sometimes will be 4 digit and how I can compare it?

For example I define 180ms is not acceptable, if now the ping is 100/250/300 ms while the 250 is higher than 180 , then I will print 'high Alarm'.

2 
MSG="Success rate is 100 percent (5/5), round-trip min/avg/max = 140/140/141 ms"

AVG=`echo "$MSG" | cut -f2 -d= | cut -f2 -d/`

if [ "$AVG" -gt 180 ]
then
   echo "Alarm!"
fi
3

Thanks for robotronic 's help.
but i was mistake the result i obtain from the router must be look like this

"Router#ping 192.168.1.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 104/104/104 ms
Router#"

there must be 7 lines how can i get the middle average value

in addition, how i can handle the non standard reply , (e.g the remote cannot be ping)

Router#ping 1.1.1.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:
U.U..
Success rate is 0 percent (0/5)
Router#

anyway, thanks for robotronic 's help as I had already search for a very long time for nothing.

4

Populate the MSG variable with the text you want or substitute the echo command with the output of telnet (through pipe) and then:

echo "$MSG" | awk -F= '
   /round-trip/ {
      split($2, a, "/");
      avg=a[2];
      if (avg > 180) {
         print("Alarm! ("avg")");
      } else {
         print("Ping OK. ("avg")");
      }
   flag=1;
   exit;
   }
   END {
      if (! flag) {
         print("Cannot ping!");
      }
   }
'

or, continuing with the shell way:

AVG=`echo "$MSG" | grep "round-trip" | cut -f2 -d= | cut -f2 -d/`
 
if [ ! "$AVG" ] 
then 
   echo "Cannot ping!" 
elif [ "$AVG" -gt 180 ]
then   
   echo "Alarm! ($AVG)" 
else
   echo "Ping OK. ($AVG)" 
fi
5

robotronic
I am trying, and sol glad got your reply.
I will try after office hour.