SNMP::Info::Layer1(3) SNMP Interface to network devices serving Layer1 only.


Max Baker


# Let SNMP::Info determine the correct subclass for you.
my $l1 = new SNMP::Info(
AutoSpecify => 1,
Debug => 1,
DestHost => 'myswitch',
Community => 'public',
Version => 1
or die "Can't connect to DestHost.\n";
my $class = $l1->class();
print "SNMP::Info determined this device to fall under subclass : $class\n";
# Let's get some basic Port information
my $interfaces = $l1->interfaces();
my $i_up = $l1->i_up();
my $i_speed = $l1->i_speed();
foreach my $iid (keys %$interfaces) {
my $port = $interfaces->{$iid};
my $up = $i_up->{$iid};
my $speed = $i_speed->{$iid}
print "Port $port is $up. Port runs at $speed.\n";


This class is usually used as a superclass for more specific device classes listed under SNMP::Info::Layer1::* Please read all docs under SNMP::Info first.

Provides abstraction to the configuration information obtainable from a Layer1 device through SNMP. Information is stored in a number of MIBs.

For speed or debugging purposes you can call the subclass directly, but not after determining a more specific class using the method above.

 my $l1 = new SNMP::Info::Layer1(...);

Inherited Classes


Required MIBs


MIBs required for ``Required MIBs'' in SNMP::Info

See ``Required MIBs'' in SNMP::Info for its MIB requirements.

SNMP-REPEATER-MIB needs to be extracted from


These are methods that return scalar value from SNMP
Gets the number of ports under the interface mib



Cross references $l1->id() with product IDs.

For HP devices, removes 'hpswitch' from the name

For Cisco devices, removes 'sysid' from the name

Tries to discover the vendor from $l1->model() and $l1->vendor()
Adds the values from rptr_ports() and ports_managed()
Number of 'groups' in the Repeater MIB


Global Methods imported from SNMP::Info

See documentation in ``GLOBALS'' in SNMP::Info for details.


These are methods that return tables of information in the form of a reference to a hash.


Returns reference to the map between IID and physical Port.
Returns reference to map of IIDs to link status.
Returns reference to map of IIDs to administrative link status.

Repeater MIB

Number of ports in each group.


Port number in Group


Group (slot) Number for given port.



Table Methods imported from SNMP::Info

See documentation in ``TABLE METHODS'' in SNMP::Info for details.