8e3f10673e
netdisco/snmp-info#295 for issue tested on c3750x (stacked & single) & nexus 9332. c3750x didn't show any slave interfaces for it's port channels. nexus reported data all over the place, even making port channels slave interfaces of other port channels. with these changes both devices report correct and complete slave interfaces: tested on c3750x with lacp channels tested on nexus 9332pq with lacp channels (vpc), static aggregation, vpc peer link, fex uplink. no regressions detected after a month of testing (we also have a bunch of ciscosb & other ios devices running , but none of those have port channels). updated documentation, hope it makes sense. things that didn't work before and still don't: * mapping vpc portchannels members on both vpc cluster switches (sounds like fun) * cisco ucs fabric interconnects (nexus 6248 on 3.2.3d) don't show port channel members, but didn't do so before either. munge_port_ifindex() can most likely be written more elegant, but that's something for a real perl monk.
255 lines
6.4 KiB
Perl
255 lines
6.4 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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use vars qw/$DEBUG $VERSION %MIBS %FUNCS %GLOBALS %MUNGE/;
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$VERSION = '3.64';
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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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MIBs can be found at ftp://ftp.cisco.com/pub/mibs/v2/v2.tar.gz
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=head1 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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