NAME

       SNMP::Info::Layer3 - SNMP Interface to network devices serving Layer3 or Layers 2 & 3

AUTHOR

       Max Baker

SYNOPSIS

        # Let SNMP::Info determine the correct subclass for you.
        my $l3 = new SNMP::Info(
                                 AutoSpecify => 1,
                                 Debug       => 1,
                                 DestHost    => 'myswitch',
                                 Community   => 'public',
                                 Version     => 2
                               )
           or die "Can't connect to DestHost.\n";

        my $class = $l3->class();
        print "SNMP::Info determined this device to fall under subclass : $class\n";

        # Let's get some basic Port information
        my $interfaces = $l3->interfaces();
        my $i_up       = $l3->i_up();
        my $i_speed    = $l3->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";
        }

DESCRIPTION

       This class is usually used as a superclass for more specific device classes listed under
       SNMP::Info::Layer3::*   Please read all docs under SNMP::Info first.

       Provides generic methods for accessing SNMP data for Layer 3 network devices.  Includes
       support for Layer2+3 devices.

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

        my $l3 = new SNMP::Info::Layer3(...);

   Inherited Classes
       SNMP::Info
       SNMP::Info::Bridge (For L2/L3 devices)
       SNMP::Info::EtherLike
       SNMP::Info::Entity
       SNMP::Info::PowerEthernet
       SNMP::Info::IPv6

   Required MIBs
       IP-MIB
       OSPF-MIB
       BGP4-MIB

   Inherited MIBs
       See "Required MIBs" in SNMP::Info for its MIB requirements.

       See "Required MIBs" in SNMP::Info::Bridge for its MIB requirements.

       See "Required MIBs" in SNMP::Info::EtherLike for its MIB requirements.

       See "Required MIBs" in SNMP::Info::Entity for its MIB requirements.

       See "Required MIBs" in SNMP::Info::PowerEthernet for its MIB requirements.

       See "Required MIBs" in SNMP::Info::IPv6 for its MIB requirements.

GLOBALS

       These are methods that return scalar value from SNMP

       $l3->mac()
           Returns root port mac address

           ("ifPhysAddress.1")

       $l3->router_ip()
           ("ospfRouterId.0")

       $l3->bgp_id()
           ("bgpIdentifier.0")

           Returns the BGP identifier of the local system

       $l3->bgp_local_as()
           Returns the local autonomous system number

           ("bgpLocalAs.0")

   Overrides
       $l3->model()
           Tries to reference $l3->id() to one of the product MIBs listed above

           Removes 'cisco'  from cisco devices for readability.

       $l3->serial()
           Tries to cull a serial number from ENTITY-MIB, description, and OLD-CISCO-... MIB.

       $l3->vendor()
           Tries to cull a Vendor name from "sysDescr"

       $l3->root_ip()
           Returns the primary IP used to communicate with the device.  Returns the first found:
           OSPF Router ID ("ospfRouterId") or any OSPF Host IP Address ("ospfHostIpAddress").

   Globals imported from SNMP::Info
       See "GLOBALS" in SNMP::Info for details.

   Global Methods imported from SNMP::Info::Bridge
       See "GLOBALS" in SNMP::Info::Bridge for details.

   Global Methods imported from SNMP::Info::EtherLike
       See "GLOBALS" in SNMP::Info::EtherLike for details.

   Global Methods imported from SNMP::Info::Entity
       See "GLOBALS" in SNMP::Info::Entity for details.

TABLE METHODS

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

   Overrides
       $l3->interfaces()
           Returns the map between SNMP Interface Identifier (iid) and physical port name.

           Only returns those iids that have a description listed in $l3->i_description()

       $l3->i_ignore()
           Returns reference to hash.  Creates a key for each IID that should be ignored.

           Currently looks for tunnel,loopback,lo,null from $l3->interfaces()

       $l3->i_name()
           Returns reference to hash of iid to human set name.

           Defaults to "ifName", but checks for an "ifAlias"

       $l3->i_duplex()
           Returns reference to hash of iid to current link duplex setting.

           Maps $l3->el_index() to $l3->el_duplex, then culls out full,half, or auto and sets the
           map to that value.

           See SNMP::Info::Etherlike for the el_index() and el_duplex() methods.

   IP-MIB Arp Cache Table ("ipNetToMediaTable")
       $l3->at_index()
           Returns reference to hash.  Maps ARP table entries to Interface IIDs

           ("ipNetToMediaIfIndex")

           If the device doesn't support "ipNetToMediaIfIndex", this will try the deprecated
           "atIfIndex".

       $l3->at_paddr()
           Returns reference to hash.  Maps ARP table entries to MAC addresses.

           ("ipNetToMediaPhysAddress")

           If the device doesn't support "ipNetToMediaPhysAddress", this will try the deprecated
           "atPhysAddress".

       $l3->at_netaddr()
           Returns reference to hash.  Maps ARP table entries to IP addresses.

           ("ipNetToMediaNetAddress")

           If the device doesn't support "ipNetToMediaNetAddress", this will try the deprecated
           "atNetAddress".

   ARP Cache Entries
       The "atTable" has been deprecated since 1991.  You should never need to use these methods.
       See "ipNetToMediaTable" above.

       $l3->old_at_index()
           Returns reference to map of IID to Arp Cache Entry

           ("atIfIndex")

       $l3->old_at_paddr()
           Returns reference to hash of Arp Cache Entries to MAC address

           ("atPhysAddress")

       $l3->old_at_netaddr()
           Returns reference to hash of Arp Cache Entries to IP Address

           ("atNetAddress")

   BGP Peer Table ("bgpPeerTable")
       $l3->bgp_peers()
           Returns reference to hash of BGP peer to local IP address

           ("bgpPeerLocalAddr")

       $l3->bgp_peer_id()
           Returns reference to hash of BGP peer to BGP peer identifier

           ("bgpPeerIdentifier")

       $l3->bgp_peer_state()
           Returns reference to hash of BGP peer to BGP peer state

           ("bgpPeerState")

       $l3->bgp_peer_as()
           Returns reference to hash of BGP peer to BGP peer autonomous system number

           ("bgpPeerRemoteAs")

       $l3->bgp_peer_addr()
           Returns reference to hash of BGP peer to BGP peer IP address

           ("bgpPeerRemoteAddr")

       $l3->bgp_peer_fsm_est_trans()
           Returns reference to hash of BGP peer to the total number of times the BGP FSM
           transitioned into the established state

           ("bgpPeerFsmEstablishedTransitions")

       $l3->bgp_peer_in_tot_msgs()
           Returns reference to hash of BGP peer to the total number of messages received from
           the remote peer on this connection

           ("bgpPeerInTotalMessages")

       $l3->bgp_peer_in_upd_el_time()
           Returns reference to hash of BGP peer to the elapsed time in seconds since the last
           BGP UPDATE message was received from the peer.

           ("bgpPeerInUpdateElapsedTime")

       $l3->bgp_peer_in_upd()
           Returns reference to hash of BGP peer to the number of BGP UPDATE messages received on
           this connection

           ("bgpPeerInUpdates")

       $l3->bgp_peer_out_tot_msgs()
           Returns reference to hash of BGP peer to the total number of messages transmitted to
           the remote peer on this connection

           ("bgpPeerOutTotalMessages")

       $l3->bgp_peer_out_upd()
           Returns reference to hash of BGP peer to the number of BGP UPDATE messages transmitted
           on this connection

           ("bgpPeerOutUpdates")

   OSPF Interface Table ("ospfIfTable")
       $l3->ospf_if_ip()
           Returns reference to hash of OSPF interface IP addresses

           ("ospfIfIpAddress")

       $l3->ospf_if_area()
           Returns reference to hash of the OSPF area to which the interfaces connect

           ("ospfIfAreaId")

       $l3->ospf_if_type()
           Returns reference to hash of the OSPF interfaces' type

           ("ospfIfType")

       $l3->ospf_if_hello()
           Returns reference to hash of the OSPF interfaces' hello interval

           ("ospfIfHelloInterval")

       $l3->ospf_if_dead()
           Returns reference to hash of the OSPF interfaces' dead interval

           ("ospfIfRtrDeadInterval")

       $l3->ospf_if_admin()
           Returns reference to hash of the OSPF interfaces' administrative status

           ("ospfIfAdminStat")

       $l3->ospf_if_state()
           Returns reference to hash of the OSPF interfaces' state

           ("ospfIfState")

   OSPF Neighbor Table ("ospfNbrTable")
       $l3->ospf_peers()
           Returns reference to hash of IP addresses the neighbor is using in its IP Source
           Addresses

           ("ospfNbrIpAddr")

       $l3->ospf_peer_id()
           Returns reference to hash of neighbor Router IDs

           ("ospfNbrRtrId")

       $l3->ospf_peer_state()
           Returns reference to hash of state of the relationship with the neighbor routers

           ("ospfNbrState")

   Table Methods imported from SNMP::Info
       See "TABLE METHODS" in SNMP::Info for details.

   Table Methods imported from SNMP::Info::Bridge
       See "TABLE METHODS" in SNMP::Info::Bridge for details.

   Table Methods imported from SNMP::Info::EtherLike
       See "TABLE METHODS" in SNMP::Info::EtherLike for details.

   Table Methods imported from SNMP::Info::Entity
       See "TABLE METHODS" in SNMP::Info::Entity for details.

   Table Methods imported from SNMP::Info::PowerEthernet
       See "TABLE METHODS" in SNMP::Info::PowerEthernet for details.

   Table Methods imported from SNMP::Info::IPv6
       See "TABLE METHODS" in SNMP::Info::IPv6 for details.