253 lines
6.3 KiB
Perl
253 lines
6.3 KiB
Perl
# SNMP::Info::CiscoAgg
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#
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# Copyright (c) 2019 SNMP::Info Developers
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# * Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# * Neither the name of the University of California, Santa Cruz nor the
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# names of its contributors may be used to endorse or promote products
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# derived from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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# LIABLE FOR # ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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package SNMP::Info::CiscoAgg;
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use strict;
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use warnings;
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use Exporter;
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use SNMP::Info::IEEE802dot3ad;
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@SNMP::Info::CiscoAgg::ISA = qw/
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SNMP::Info::IEEE802dot3ad
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Exporter
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/;
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@SNMP::Info::CiscoAgg::EXPORT_OK = qw/
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agg_ports
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agg_ports_cisco
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agg_ports_lag
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agg_ports_pagp
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/;
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our ($DEBUG, $VERSION, %MIBS, %FUNCS, %GLOBALS, %MUNGE);
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$VERSION = '3.71';
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%MIBS = (
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%SNMP::Info::IEEE802dot3ad::MIBS,
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'CISCO-PAGP-MIB' => 'pagpGroupIfIndex',
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'CISCO-LAG-MIB' => 'clagAggPortListPorts',
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'CISCO-IF-EXTENSION-MIB' => 'cieIfLastInTime',
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);
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%GLOBALS = ();
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%FUNCS = (
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%SNMP::Info::IEEE802dot3ad::FUNCS,
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'lag_ports' => 'clagAggPortListPorts',
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'lag_members' => 'clagAggPortListInterfaceIndexList',
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);
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%MUNGE = (
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%SNMP::Info::IEEE802dot3ad::MUNGE,
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'lag_ports' => \&SNMP::Info::munge_port_list,
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'lag_members' => \&munge_port_ifindex,
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);
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sub munge_port_ifindex {
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my $plist = shift;
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return unless defined $plist;
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return unless length $plist;
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my $list = [ map {sprintf "%d", hex($_)} unpack( "(A8)*", join( '' , map { sprintf "%02x", $_} unpack( "(C4)*", $plist ) )) ];
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return $list;
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}
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sub agg_ports_cisco {
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my $dev = shift;
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my $group = $dev->lag_members;
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my $mapping = {};
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for my $master (keys %$group) {
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my $slaves = $group->{$master};
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for my $slave (@$slaves) {
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$mapping->{$slave} = $master;
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}
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}
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return $mapping;
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}
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sub agg_ports_pagp {
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my $dev = shift;
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# Note that this mapping will miss any interfaces that are down during
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# polling. If one of the members is up, we could use
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# pagpAdminGroupCapability to figure things out, but if they're all
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# down, we're hosed. Since we could be hosed anyway, we skip the fancy
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# stuff.
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my $mapping = {};
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my $group = $dev->pagpGroupIfIndex;
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for my $slave (keys %$group) {
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my $master = $group->{$slave};
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next if($master == 0 || $slave == $master);
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$mapping->{$slave} = $master;
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}
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return $mapping;
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}
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sub agg_ports_lag {
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my $dev = shift;
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# same note as for agg_ports_pagp, it will miss mappings if interfaces
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# are down or lacp is not synced.
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my $mapping = {};
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my $group = $dev->dot3adAggPortSelectedAggID;
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for my $slave (keys %$group) {
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my $master = $group->{$slave};
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next if($master == 0 || $slave == $master);
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$mapping->{$slave} = $master;
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}
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return $mapping;
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}
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# combine PAgP, LAG & Cisco proprietary data
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sub agg_ports {
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my $ret = {%{agg_ports_pagp(@_)}, %{agg_ports_lag(@_)}, %{agg_ports_cisco(@_)}};
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return $ret;
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}
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1;
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__END__
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=head1 NAME
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SNMP::Info::CiscoAgg - SNMP Interface to Cisco Aggregated Links
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=head1 AUTHOR
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SNMP::Info Developers
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=head1 SYNOPSIS
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# Let SNMP::Info determine the correct subclass for you.
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my $info = new SNMP::Info(
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AutoSpecify => 1,
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Debug => 1,
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DestHost => 'myrouter',
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Community => 'public',
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Version => 2
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)
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or die "Can't connect to DestHost.\n";
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my $class = $info->class();
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print "SNMP::Info determined this device to fall under subclass : $class\n";
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=head1 DESCRIPTION
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This class provides access to Aggregated Links configuration on Cisco devices.
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It combines Cisco PAgP, Cisco proprietary info and IEEE 802.3ad information.
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Use or create in a subclass of SNMP::Info. Do not use directly.
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=head2 Inherited Classes
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L<SNMP::Info::IEEE802dot3ad>
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=head2 Required MIBs
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=over
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=item F<CISCO-PAGP-MIB>
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=item F<CISCO-LAG-MIB>
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=item F<CISCO-IF-EXTENSION-MIB>
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=back
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=head1 TABLE METHODS
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=over 4
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=item C<agg_ports>
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Returns a HASH reference mapping from slave to master port for each member of
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a port bundle on the device. Keys are ifIndex of the slave ports, Values are
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ifIndex of the corresponding master ports.
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=item C<agg_ports_cisco>
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Implements the cisco LAG info retrieval. Merged into C<agg_ports> data
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automatically. Will fetch all members of C<clagAggPortListInterfaceIndexList>
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even if they are not running an aggregation protocol.
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=item C<agg_ports_pagp>
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Implements the PAgP LAG info retrieval. Merged into C<agg_ports> data
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automatically.
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=item C<lag_members>
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Mimics C<ad_lag_ports> from L<SNMP::Info::IEEE802dot3ad> but based on ifindex
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instead of instead of bp_index.
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=back
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=head2 OVERRIDES
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=over
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=item C<agg_ports_lag>
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This will retrieve LAG ports based on C<dot3adAggPortSelectedAggID> data.
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It will be merged into C<agg_ports> data.
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=back
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=head2 Table Methods imported from SNMP::Info::IEEE802dot3ad
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=over
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See documentation in L<SNMP::Info::IEEE802dot3ad> for details.
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=back
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=head1 MUNGES
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=over
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=item C<munge_port_ifindex>
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Takes C<clagAggPortListInterfaceIndexList>, uses the index as master port, then
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returns all members as ifindex. Works with single or multiple slaves to a master.
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=back
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=cut
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