Perhaps if I explain how the code works you can adapt it to your actual data? Here's the main part of code again:

my $lastIP;

while (<DATA>) {
  print if /network name|interface name|VRID|state|primary address/i;
  print "$lastIP\n\n" if /Monitored circuits:/ and defined $lastIP;
  $lastIP = $1 if /((\d{1,3}\.){3}\d{1,3})/;
}
[download]

$lastIP remembers the last IP address seen so it can be printed when "Monitored circuits" is noticed.

while (<DATA>) reads the data one line at a time. You would normally use a file handled that you had created with open inFile, '<', 'filename' in place of DATA.

print without parameters prints the contents of the default variable - in this case the data line that was last read from DATA. if /network name|i...address/i matches an interesting line (insensitive to case) and allows the print if there is a match.

print "$lastIP\n\n" prints the IP address preceeding the line containing "Monitored circuits".

This most important line is the one that matches "interesting lines". It does that by matching any of "network name", "interface name", "VRID", "state" or "primary address". Note the | between each string in the regular experssion pattern. They allow a match on any of the strings in the pattern.

You should be able to take that and extend the match to do what you require. If not, show us your attempt, what it prints, and what you would like it to print. Note that we only need pertinant data and only enough to demonstrate the problem. Otherwise the problem gets burried in clutter. Reduce your data to a bare minimum the shows the issue.

Hello

#use strict;
#use warnings;

$/=undef;
$d=<DATA>;
print " Hello\n";
print if $d=~ /Device |interface |VRID|state|primary address/i;

my (@ip)=($d=~m/number addresses(?:.*?)((?:\d{1,3}\.){3}\d{1,3})/gsi);
print "The addresses are: ". join("\n",@ip)."\n";


__DATA__

 logging to Device F01 is 19.9.16.11...
 Showing the vrrp status 

VRRP Interfaces
Interface WEB_A
        Authentication: NoAuthentication
    VRID 39
        State:        Master        Time since transition:    

582693
        hfghfghfghghghfghfhhfgh
                Primary address:    195.51.205.220
                Number addresses:    1
            195.51.205.222
        Monitored circuits:
            Afgh_A (priority 1fgh50)
            SRghf1 (priority 1fgh50)


Interface DATA_DL
    Nufghfghmber of vhfghl roufgh
    Fgfhfghs: 
    AuthefghfgntichoAhfhication
    VRID 2556
        State:        Master        Time since transition:    

13405375
        Bahfgh    Flafghfghgs:            
        Advertfghdl:    1    Rfghfghfgval:    3fghfghfgh fghfsgh
        VfghfghVRghfg             Vh
        Primary address:    19.18.27.65
        Next advertisement:    0
        Number addresses:    1
            15.12.57.234

I
 logging to Device L2 is 14.359.1.2...
Showing the vrrp status 
VRRP Interfaces
Interface SDC_A
    Nughujgj
    AuthentijghjghjNoAuthentication
    VRID 9
        State:        Backup        Time since transition:    

582695
        Mghjghjer:        hgjghjghj0
        BahhjFlags:            
        Adverghjad Interval:    3
        VMAChj        VMAhj1:ef
        Primary address:    195.51.205.221
        Masghjghjg
        Number addresses:    1
            195.51.205.222

Interface SA
    Numbehgjghjr of virtualj: 1
    Fghjg
    Authentijghjtion
    VRID 7
        State:        Backup        Time since transition:    

582695
        Master:        62.187.224.12
        Baseghjghj4    Flags:            
        Advertisement ihjghjRouterhjghj3jghjVRRP              VMAC: 

ghj:01jghj
        Primary address:    62.187.224.13
        Mastghjghj
        Number addresses:    1
            6.17.26.14
[download]

This is my code and gives the output as ip address below the "number address" but the getting the device name,interface name,VRID,State,primary address is not happening.

any help on this ? i m missing something ?

This may be what you want now, but really you need to sort out what problem you actually need to solve.

Note that this is still reading the data a line at a time rather than slurping the data as your code was. Unless this code is part of something larger that needs to further process the original data there is no advantage in slurping everything. Even if you did need to process the data further, you would be better to slurp into an array than to slurp the whole thing into a scalar.

use strict;
use warnings;

my $dumpIPs = 0;

while (<DATA>) {
  if ($dumpIPs and /((\d{1,3}\.){3}\d{1,3})/) {
    print "$1 ";
  } elsif ($dumpIPs) {
    print "\n\n";
    $dumpIPs = 0;
  }

  if (/\b(?:Device|interface|VRID|state|primary address)\b/i) {
    print;
    $dumpIPs = 0;
  }
  
  $dumpIPs ||= /Number addresses/;
}
[download]

Read more... OP's data (2 kB)

Prints:

 logging to Device F01 is 19.9.16.11...
Interface WEB_A
    VRID 39
        State:        Master        Time since transition:    
                Primary address:    195.51.205.220
195.51.205.222 

Interface DATA_DL
    VRID 2556
        State:        Master        Time since transition:    
        Primary address:    19.18.27.65
15.12.57.234 

 logging to Device L2 is 14.359.1.2...
Interface SDC_A
    VRID 9
        State:        Backup        Time since transition:    
        Primary address:    195.51.205.221
195.51.205.222 

Interface SA
    VRID 7
        State:        Backup        Time since transition:    
        Primary address:    62.187.224.13
6.17.26.14
[download]

---

DWIM is Perl's answer to Gödel

Hello

What if i have to take input from a text file and print the output to a excel file for the same output we have above ?