NAME

SNMP::Info::CDP - Perl5 Interface to Cisco Discovery Protocol (CDP) using SNMP

DESCRIPTION

CDP provides Layer 2 discovery of attached devices that also speak CDP, including switches, routers and hubs.

AUTHOR

Max Baker (max@warped.org)

SYNOPSIS

 my $cdp = new SNMP::Info::CDP( DestHost  => 'router' , 
                          Community => 'public' );
 $hascdp = $cdp->hasCDP() ? 'yes' : 'no';
 @neighbor_ips = values( %{$cdp->ip()} );

CREATING AN OBJECT

new SNMP::Info::CDP()

Arguments passed to new() are passed on to SNMP::Session::new()

    my $cdp = new SNMP::Info::CDP(
        DestHost => $host,
        Community => 'public'
        ) 
    die "Couldn't connect.\n" unless defined $cdp;

$cdp->session()

Sets or returns the SNMP::Session object

    # Get
    my $sess = $cdp->session();

    # Set
    my $newsession = new SNMP::Session(...);
    $cdp->session($newsession);

Your Device May Vary

Each device implements a subset of the global and cache entries. Check the return value to see if that data is held by the device.

CDP GLOBAL VALUES

$cdp->hasCDP()

Is CDP is active in this device?

Accounts for SNMP version 1 devices which may have CDP but not cdp_run()

$cdp->cdp_run()

Is CDP enabled on this device?

(cdpGlobalRun)

$cdp->cdp_interval()

Interval in seconds at which CDP messages are generated.

(cdpGlobalMessageInterval)

$cdp->cdp_holdtime()

Time in seconds that CDP messages are kept.

(cdpGlobalHoldTime)

$cdp->cdp_id()

Returns CDP device ID.

This is the device id broadcast via CDP to other devices, and is what is retrieved from remote devices with $cdp->id().

(cdpGlobalDeviceId)

CDP CACHE ENTRIES

$cdp->c_proto()

Returns remote address type received. Usually IP.

(cdpCacheAddressType)

$cdp->c_ip()

Returns remote IP address

(cdpCacheAddress)

$cdp->c_ver()

Returns remote hardware version

(cdpCacheVersion)

$cdp->c_id()

Returns remote device id string

(cdpCacheDeviceId)

$cdp->c_port()

Returns remote port ID

(cdpDevicePort)

$cdp->c_platform()

Returns remote platform id

(cdpCachePlatform)

$cdp->c_capabilities()

Returns Device Functional Capabilities bitmap.

Anyone know where I can get info on how to decode this?

(cdpCacheCapabilities)

$cdp->c_domain()

Returns remote VTP Management Domain as defined in CISCO-VTP-MIB::managementDomainName

(cdpCacheVTPMgmtDomain)

$cdp->c_vlan()

Returns the remote interface native VLAN.

(cdpCacheNativeVLAN)

$cdp->c_duplex()

Returns the port duplex status from remote devices.

(cdpCacheDuplex)