WhatsUpGoldPS

0.1.22

helpers/lldp/Get-LldpNeighborInventory.ps1

                                #requires -Version 5.1

$script:LldpScriptDir = Split-Path $MyInvocation.MyCommand.Path -Parent

function Get-LldpOidMap {

    [ordered]@{

        RemoteTable = '1.0.8802.1.1.2.1.4.1.1'

        ChassisIdSubtype = '4'; ChassisId = '5'; PortIdSubtype = '6'; PortId = '7'

        PortDescription = '8'; SystemName = '9'; SystemDescription = '10'

        CapabilitiesSupported = '11'; CapabilitiesEnabled = '12'; ManagementAddressSubtype = '13'

    }

}

function ConvertFrom-LldpTable {

    [CmdletBinding()]

    param([Parameter(Mandatory = $true)][object[]]$Rows, [Parameter(Mandatory = $true)][hashtable]$OidMap)

    $columns = @{}

    foreach ($name in @('ChassisIdSubtype','ChassisId','PortIdSubtype','PortId','PortDescription','SystemName','SystemDescription','CapabilitiesSupported','CapabilitiesEnabled','ManagementAddressSubtype')) {

        $columns[$name] = "$($OidMap.RemoteTable).$($OidMap[$name])"

    }

    $byIndex = @{}

    foreach ($item in @($Rows)) {

        $oid = [string]$item.OID

        foreach ($name in $columns.Keys) {

            $prefix = "$($columns[$name])."

            if ($oid.StartsWith($prefix, [System.StringComparison]::Ordinal)) {

                $index = $oid.Substring($prefix.Length)

                if (-not $byIndex.ContainsKey($index)) { $byIndex[$index] = @{} }

                $byIndex[$index][$name] = [string]$item.Value

                break

            }

        }

    }

    $result = [System.Collections.Generic.List[object]]::new()

    foreach ($index in @($byIndex.Keys)) {

        $row = $byIndex[$index]

        $result.Add([pscustomobject][ordered]@{

            Source = 'SNMP'; RecordType = 'Neighbor'; Protocol = 'LLDP'; Index = $index

            LocalInterface = (($index -split '\.')[1]); LocalInterfaceIndex = (($index -split '\.')[1]); RemoteIndex = (($index -split '\.')[2])

            ChassisIdSubtype = $row.ChassisIdSubtype; ChassisId = $row.ChassisId

            PortIdSubtype = $row.PortIdSubtype; RemotePort = $row.PortId

            RemotePortDescription = $row.PortDescription; RemoteSystemName = $row.SystemName

            RemoteSystemDescription = $row.SystemDescription; CapabilitiesSupported = $row.CapabilitiesSupported

            CapabilitiesEnabled = $row.CapabilitiesEnabled; ManagementAddressSubtype = $row.ManagementAddressSubtype

            State = 'Discovered'; Status = 'Healthy'

        })

    }

    return @($result)

}

function Get-LldpNeighborInventory {

    [CmdletBinding()]

    param(

        [Parameter(Mandatory = $true)][string]$Target, [string]$Community = 'public',

        [ValidateSet('V1','V2')][string]$SnmpVersion = 'V2', [int]$Port = 161,

        [int]$Timeout = 5000, [int]$MaxRepetitions = 25, [hashtable]$OidMap = $(Get-LldpOidMap)

    )

    $snmpRoot = Join-Path (Split-Path $script:LldpScriptDir -Parent) 'snmp\WhatsUpGoldPS.Snmp\Public'

    . (Join-Path $snmpRoot 'Import-SharpSnmpLib.ps1')

    . (Join-Path $snmpRoot 'Get-SNMPTableSharp.ps1')

    Import-SharpSnmpLib -ErrorAction Stop | Out-Null

    $raw = @(Get-SNMPTableSharp -Target $Target -BaseOid $OidMap.RemoteTable -Community $Community -SnmpVersion $SnmpVersion -Port $Port -Timeout $Timeout -MaxRepetitions $MaxRepetitions)

    return @(ConvertFrom-LldpTable -Rows $raw -OidMap $OidMap)

}

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