#! perl -slw
use strict;

my( $nName, $iName, $vrid, $state, $paddr, $nAddr, $oAddrs, @oAddrs );

die "File does not contain a Network name header"
    unless ( $nName ) = <DATA> =~ m[Network\sname \s+ (\S+)]x;

local $/ = "\nI";
while( <DATA> ) {
    if(
        ( $iName, $vrid, $state, $paddr, $nAddr, $oAddrs ) = m[
            (?=.*? nterface           \s+ (\S+) )
            (?=.*? VRID               \s+ (\S+) )
            (?=.*? State:             \s+ (\S+) )
            (?=.*? Primary\saddress:  \s+ (\S+) )
            (?=.*?
                Number\saddresses:    \s+ (\S+)
                ( .+? )
                (?=Monitored\scircuits:)
            )
        ]smx
    ) {
        @oAddrs = split ' ', $oAddrs;
        print join ', ', $nName, $iName, $vrid, $state, $paddr, $nAddr, @oAddrs;
    }
    else {
        warn "File did not match required format";
    }
}


##</code><code>##

C:\test>junk1
A, WEB_A, 145, Master, 194.551.205.250, 1, 135.51.045.242
A, WEB_B, 145, backup, 19.51.205.20, 2, 135.51.05.22, 321.654.987.111
A, WEB_C, 145, backup, 19.51.205.20, 3, 135.51.05.22, 123.456.789.001, 321.654.987.111

##</code><code>##

__DATA__
Network name A
Interface WEB_A
    ggggggggg
        VRID 145
        State:        Master
                   XXXXXXXXXXXX
    Effective  Priority:    200
        07:09:56:04:0t:ef
        Primary address:    194.551.205.250
        Number addresses:    1
        135.51.045.242
Monitored circuits:
            vbgghdfgdfg
Interface WEB_B
    ggggggggg
    Agggggg
    VRID 145
        State:        backup
                   XXXXXXXXXXXX
    Effective  Priority:    200
        07:09:56:04:0t:ef
        Primary address:    19.51.205.20
        Next advertisement:    0
        Number addresses:    2
            135.51.05.22
            321.654.987.111
        Monitored circuits:
            vbgghdfgdfg
Interface WEB_C
    ggggggggg
    Agggggg
    VRID 145
        State:        backup
                   XXXXXXXXXXXX
    Effective  Priority:    200
        07:09:56:04:0t:ef
        Primary address:    19.51.205.20
        Next advertisement:    0
        Number addresses:    3
            135.51.05.22
            123.456.789.001
            321.654.987.111
        Monitored circuits:
            vbgghdfgdfg