13 Usage: $0 [<options>] <ip-addr>
16 --debug Show debugging outputs
17 --mac Show one MAC address learned per port
18 --allmac Show all MAC addresses learned per port
19 --force-v1 Use SNMPv1 (work-around for buggy switches)
30 'allmac' => \$all_mac,
31 'force-v1' => \$force_v1,
35 my ($switch_ip) = @ARGV;
36 my $community = 'public';
39 my $is_tty = -t STDOUT;
42 return $is_tty ? `tput $a` : "";
44 my $t_red = attr("setaf 1");
45 my $t_green = attr("setaf 2");
46 my $t_yellow = attr("setaf 3");
47 my $t_magenta = attr("setaf 5");
48 my $t_norm = attr("sgr0");
50 my ($snmp, $err) = Net::SNMP->session(
51 -hostname => $switch_ip,
52 -version => ($force_v1 ? '1' : '2c'),
53 -community => $community,
55 $snmp or die "Cannot establish session: $err\n";
61 for my $c (keys %$cols) {
62 my $depth = split /\./, $cols->{$c};
63 my $t = $snmp->get_table(-baseoid => $cols->{$c}) or next;
64 for my $k (keys %$t) {
65 my @k = split /\./, $k;
66 my $kk = join('.', @k[$depth..$#k]);
67 $tab->{$kk}->{$c} = $t->{$k};
78 $d = int($t/86400) . " days, ";
81 return $d . sprintf "%02d:%02d:%02d", int($t/3600), int(($t%3600)/60), $t%60;
84 my $OID_basic = '1.3.6.1.2.1.1';
86 my $basics = my_get_table({
87 'desc' => "$OID_basic.1",
88 'uptime' => "$OID_basic.3",
89 'contact' => "$OID_basic.4",
90 'name' => "$OID_basic.5",
91 'location' => "$OID_basic.6",
93 print Dumper($basics) if $debug;
94 my $bas = $basics->{0} or die "Cannot find basic info";
96 print "### Basics ###\n\n";
97 print "Device: ", $bas->{desc}, "\n";
98 print "Uptime: ", format_uptime($bas->{uptime}), "\n";
99 print "Contact: ", $bas->{contact}, "\n";
100 print "Name: ", $bas->{name}, "\n";
101 print "Location: ", $bas->{location}, "\n";
103 my $OID_ifTable = '1.3.6.1.2.1.2.2';
104 my $OID_ifTablev2 = '1.3.6.1.2.1.31.1.1';
106 my $if_table = my_get_table({
107 'desc' => "$OID_ifTable.1.2",
108 'speed' => "$OID_ifTable.1.5",
109 'mac' => "$OID_ifTable.1.6",
110 'admin' => "$OID_ifTable.1.7",
111 'oper' => "$OID_ifTable.1.8",
112 'name' => "$OID_ifTablev2.1.1",
113 'hispeed' => "$OID_ifTablev2.1.15",
114 'alias' => "$OID_ifTablev2.1.18",
117 for my $if (values %$if_table) {
118 $if->{mac} = join(':', map { sprintf "%02x", ord $_ } split(//, $if->{mac}));
119 $if_macs{$if->{mac}} = 1;
121 print Dumper($if_table) if $debug;
122 my @ifaces = sort { $a <=> $b } keys %$if_table;
123 print "MAC addr: ", join(" ", sort keys %if_macs), "\n";
125 my $OID_ipTable = '1.3.6.1.2.1.4.20';
126 my $ip_table = my_get_table({
127 'iface' => "$OID_ipTable.1.2",
128 'mask' => "$OID_ipTable.1.3",
130 print Dumper($ip_table) if $debug;
132 # XXX: IPv6 not supported yet
133 for my $ipa (keys %$ip_table) {
134 my $ip = $ip_table->{$ipa};
135 my $if = $if_table->{$ip->{iface}} or die "IP table refers to unknown iface";
136 my $nm = Net::Netmask->new2($ipa, $ip->{mask}) or die "Cannot parse IP prefix";
137 push @{$if->{ip_addrs}}, $ipa . '/' . $nm->bits;
139 print Dumper($if_table) if $debug;
142 my $OID_1qTpFdbTable = '1.3.6.1.2.1.17.7.1.2.2';
143 my $vlan_fdb_table = my_get_table({
144 'port' => "$OID_1qTpFdbTable.1.2",
145 'status' => "$OID_1qTpFdbTable.1.3",
147 print Dumper($vlan_fdb_table) if $debug;
149 if (%$vlan_fdb_table) {
150 for my $m (keys %$vlan_fdb_table) {
151 my $fdb = $vlan_fdb_table->{$m};
152 $fdb->{status} == 3 or next; # Only learned MACs
153 my $port = $if_table->{$fdb->{port}} or die "Forwarding DB refers to unknown iface";
154 my @m = split /\./, $m;
156 my $mac = join(':', map { sprintf('%02x', $_) } @m);
157 push @{$port->{macs}}, $mac;
160 print "# Trying fall-fack to .1d FDB\n" if $debug;
161 my $OID_1dTpFdbTable = '1.3.6.1.2.1.17.4.3';
162 my $fdb_table = my_get_table({
163 'port' => "$OID_1dTpFdbTable.1.2",
164 'status' => "$OID_1dTpFdbTable.1.3",
166 print Dumper($fdb_table) if $debug;
167 for my $m (keys %$fdb_table) {
168 my $fdb = $fdb_table->{$m};
169 $fdb->{status} == 3 or next; # Only learned MACs
170 my $port = $if_table->{$fdb->{port}} or die "Forwarding DB refers to unknown iface";
171 my @m = split /\./, $m;
172 my $mac = join(':', map { sprintf('%02x', $_) } @m);
173 push @{$port->{macs}}, $mac;
177 for my $if (values %$if_table) {
179 $if->{macs} = [ sort(List::Util::uniq(@{$if->{macs}})) ];
183 my $OID_VlanStaticTable = '1.3.6.1.2.1.17.7.1.4.3';
184 my $vlan_table = my_get_table({
185 'name' => "$OID_VlanStaticTable.1.1",
186 'egress-ports' => "$OID_VlanStaticTable.1.2",
187 'untagged-ports' => "$OID_VlanStaticTable.1.4",
188 'row-status' => "$OID_VlanStaticTable.1.5",
190 for my $vlan (values %$vlan_table) {
191 for my $k ('egress-ports', 'untagged-ports') {
192 $vlan->{$k} = [ split //, unpack("B*", $vlan->{$k} // "") ];
195 print Dumper($vlan_table) if $debug;
196 my @vlans = sort { $a <=> $b } grep { $vlan_table->{$_}->{'row-status'} == 1 } keys %$vlan_table;
198 print "\n### VLANs ###\n\n";
200 for my $vid (@vlans) {
201 printf "%-4d %s\n", $vid, $vlan_table->{$vid}->{'name'} // '-';
204 print "No VLAN support.\n";
207 print "\n### Ports ###\n\n";
208 # XXX: We assume that 802.1d switch ports IDs are equal to interface IDs
209 for my $port (@ifaces) {
210 my $if = $if_table->{$port};
212 my $scolor = $t_norm;
213 if ($if->{'admin'} != 1) {
215 } elsif ($if->{'oper'} != 1) {
222 my $speed = $if->{hispeed} || int($if->{speed} / 1000000);
225 } elsif ($speed < 1000) {
226 $speed = "${speed}M";
228 $speed = int($speed/1000);
229 $speed = "${speed}G";
231 printf "%-4d %-15.15s %s%-4s %-5s %s%-20s%s", $port, $if->{name}, $scolor, $state, $speed, $t_yellow, $if->{alias}, $t_norm;
236 my @macs = @{$if->{macs} // []};
238 $show_mac = $macs[0];
239 $more_macs = "${t_yellow}+${t_norm}" if @macs > 1;
241 printf "%-17s%s ", $show_mac, $more_macs;
244 for my $vid (@vlans) {
245 my $vlan = $vlan_table->{$vid};
246 if ($vlan->{'egress-ports'}->[$port]) {
247 if ($vlan->{'untagged-ports'}->[$port]) {
248 if ($t_green ne "") {
249 print " ${t_green}${vid}${t_norm}";
261 if ($if->{ip_addrs}) {
262 print "${t_yellow} IP: ", join(" ", @{$if->{ip_addrs}}), "${t_norm}\n";
266 print "${t_yellow} Local MAC: ", $if->{mac}, "${t_norm}\n";
269 for my $m (@{$if->{macs}}) {
270 print "${t_magenta} MAC: $m${t_norm}\n";