diff --git a/vendor/github.com/google/gopacket/layers/ndp.go b/vendor/github.com/google/gopacket/layers/ndp.go
new file mode 100644
index 0000000..f7ca1b2
--- /dev/null
+++ b/vendor/github.com/google/gopacket/layers/ndp.go
@@ -0,0 +1,611 @@
+// Copyright 2012 Google, Inc. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style license
+// that can be found in the LICENSE file in the root of the source
+// tree.
+
+// Enum types courtesy of...
+// http://anonsvn.wireshark.org/wireshark/trunk/epan/dissectors/packet-ndp.c
+
+package layers
+
+import (
+	"fmt"
+	"github.com/google/gopacket"
+	"net"
+)
+
+type NDPChassisType uint8
+
+// Nortel Chassis Types
+const (
+	NDPChassisother                                       NDPChassisType = 1
+	NDPChassis3000                                        NDPChassisType = 2
+	NDPChassis3030                                        NDPChassisType = 3
+	NDPChassis2310                                        NDPChassisType = 4
+	NDPChassis2810                                        NDPChassisType = 5
+	NDPChassis2912                                        NDPChassisType = 6
+	NDPChassis2914                                        NDPChassisType = 7
+	NDPChassis271x                                        NDPChassisType = 8
+	NDPChassis2813                                        NDPChassisType = 9
+	NDPChassis2814                                        NDPChassisType = 10
+	NDPChassis2915                                        NDPChassisType = 11
+	NDPChassis5000                                        NDPChassisType = 12
+	NDPChassis2813SA                                      NDPChassisType = 13
+	NDPChassis2814SA                                      NDPChassisType = 14
+	NDPChassis810M                                        NDPChassisType = 15
+	NDPChassisEthercell                                   NDPChassisType = 16
+	NDPChassis5005                                        NDPChassisType = 17
+	NDPChassisAlcatelEWC                                  NDPChassisType = 18
+	NDPChassis2715SA                                      NDPChassisType = 20
+	NDPChassis2486                                        NDPChassisType = 21
+	NDPChassis28000series                                 NDPChassisType = 22
+	NDPChassis23000series                                 NDPChassisType = 23
+	NDPChassis5DN00xseries                                NDPChassisType = 24
+	NDPChassisBayStackEthernet                            NDPChassisType = 25
+	NDPChassis23100series                                 NDPChassisType = 26
+	NDPChassis100BaseTHub                                 NDPChassisType = 27
+	NDPChassis3000FastEthernet                            NDPChassisType = 28
+	NDPChassisOrionSwitch                                 NDPChassisType = 29
+	NDPChassisDDS                                         NDPChassisType = 31
+	NDPChassisCentillion6slot                             NDPChassisType = 32
+	NDPChassisCentillion12slot                            NDPChassisType = 33
+	NDPChassisCentillion1slot                             NDPChassisType = 34
+	NDPChassisBayStack301                                 NDPChassisType = 35
+	NDPChassisBayStackTokenRingHub                        NDPChassisType = 36
+	NDPChassisFVCMultimediaSwitch                         NDPChassisType = 37
+	NDPChassisSwitchNode                                  NDPChassisType = 38
+	NDPChassisBayStack302Switch                           NDPChassisType = 39
+	NDPChassisBayStack350Switch                           NDPChassisType = 40
+	NDPChassisBayStack150EthernetHub                      NDPChassisType = 41
+	NDPChassisCentillion50NSwitch                         NDPChassisType = 42
+	NDPChassisCentillion50TSwitch                         NDPChassisType = 43
+	NDPChassisBayStack303304Switches                      NDPChassisType = 44
+	NDPChassisBayStack200EthernetHub                      NDPChassisType = 45
+	NDPChassisBayStack25010100EthernetHub                 NDPChassisType = 46
+	NDPChassisBayStack450101001000Switches                NDPChassisType = 48
+	NDPChassisBayStack41010100Switches                    NDPChassisType = 49
+	NDPChassisPassport1200L3Switch                        NDPChassisType = 50
+	NDPChassisPassport1250L3Switch                        NDPChassisType = 51
+	NDPChassisPassport1100L3Switch                        NDPChassisType = 52
+	NDPChassisPassport1150L3Switch                        NDPChassisType = 53
+	NDPChassisPassport1050L3Switch                        NDPChassisType = 54
+	NDPChassisPassport1051L3Switch                        NDPChassisType = 55
+	NDPChassisPassport8610L3Switch                        NDPChassisType = 56
+	NDPChassisPassport8606L3Switch                        NDPChassisType = 57
+	NDPChassisPassport8010                                NDPChassisType = 58
+	NDPChassisPassport8006                                NDPChassisType = 59
+	NDPChassisBayStack670wirelessaccesspoint              NDPChassisType = 60
+	NDPChassisPassport740                                 NDPChassisType = 61
+	NDPChassisPassport750                                 NDPChassisType = 62
+	NDPChassisPassport790                                 NDPChassisType = 63
+	NDPChassisBusinessPolicySwitch200010100Switches       NDPChassisType = 64
+	NDPChassisPassport8110L2Switch                        NDPChassisType = 65
+	NDPChassisPassport8106L2Switch                        NDPChassisType = 66
+	NDPChassisBayStack3580GigSwitch                       NDPChassisType = 67
+	NDPChassisBayStack10PowerSupplyUnit                   NDPChassisType = 68
+	NDPChassisBayStack42010100Switch                      NDPChassisType = 69
+	NDPChassisOPTeraMetro1200EthernetServiceModule        NDPChassisType = 70
+	NDPChassisOPTera8010co                                NDPChassisType = 71
+	NDPChassisOPTera8610coL3Switch                        NDPChassisType = 72
+	NDPChassisOPTera8110coL2Switch                        NDPChassisType = 73
+	NDPChassisOPTera8003                                  NDPChassisType = 74
+	NDPChassisOPTera8603L3Switch                          NDPChassisType = 75
+	NDPChassisOPTera8103L2Switch                          NDPChassisType = 76
+	NDPChassisBayStack380101001000Switch                  NDPChassisType = 77
+	NDPChassisEthernetSwitch47048T                        NDPChassisType = 78
+	NDPChassisOPTeraMetro1450EthernetServiceModule        NDPChassisType = 79
+	NDPChassisOPTeraMetro1400EthernetServiceModule        NDPChassisType = 80
+	NDPChassisAlteonSwitchFamily                          NDPChassisType = 81
+	NDPChassisEthernetSwitch46024TPWR                     NDPChassisType = 82
+	NDPChassisOPTeraMetro8010OPML2Switch                  NDPChassisType = 83
+	NDPChassisOPTeraMetro8010coOPML2Switch                NDPChassisType = 84
+	NDPChassisOPTeraMetro8006OPML2Switch                  NDPChassisType = 85
+	NDPChassisOPTeraMetro8003OPML2Switch                  NDPChassisType = 86
+	NDPChassisAlteon180e                                  NDPChassisType = 87
+	NDPChassisAlteonAD3                                   NDPChassisType = 88
+	NDPChassisAlteon184                                   NDPChassisType = 89
+	NDPChassisAlteonAD4                                   NDPChassisType = 90
+	NDPChassisPassport1424L3Switch                        NDPChassisType = 91
+	NDPChassisPassport1648L3Switch                        NDPChassisType = 92
+	NDPChassisPassport1612L3Switch                        NDPChassisType = 93
+	NDPChassisPassport1624L3Switch                        NDPChassisType = 94
+	NDPChassisBayStack38024FFiber1000Switch               NDPChassisType = 95
+	NDPChassisEthernetRoutingSwitch551024T                NDPChassisType = 96
+	NDPChassisEthernetRoutingSwitch551048T                NDPChassisType = 97
+	NDPChassisEthernetSwitch47024T                        NDPChassisType = 98
+	NDPChassisNortelNetworksWirelessLANAccessPoint2220    NDPChassisType = 99
+	NDPChassisPassportRBS2402L3Switch                     NDPChassisType = 100
+	NDPChassisAlteonApplicationSwitch2424                 NDPChassisType = 101
+	NDPChassisAlteonApplicationSwitch2224                 NDPChassisType = 102
+	NDPChassisAlteonApplicationSwitch2208                 NDPChassisType = 103
+	NDPChassisAlteonApplicationSwitch2216                 NDPChassisType = 104
+	NDPChassisAlteonApplicationSwitch3408                 NDPChassisType = 105
+	NDPChassisAlteonApplicationSwitch3416                 NDPChassisType = 106
+	NDPChassisNortelNetworksWirelessLANSecuritySwitch2250 NDPChassisType = 107
+	NDPChassisEthernetSwitch42548T                        NDPChassisType = 108
+	NDPChassisEthernetSwitch42524T                        NDPChassisType = 109
+	NDPChassisNortelNetworksWirelessLANAccessPoint2221    NDPChassisType = 110
+	NDPChassisNortelMetroEthernetServiceUnit24TSPFswitch  NDPChassisType = 111
+	NDPChassisNortelMetroEthernetServiceUnit24TLXDCswitch NDPChassisType = 112
+	NDPChassisPassport830010slotchassis                   NDPChassisType = 113
+	NDPChassisPassport83006slotchassis                    NDPChassisType = 114
+	NDPChassisEthernetRoutingSwitch552024TPWR             NDPChassisType = 115
+	NDPChassisEthernetRoutingSwitch552048TPWR             NDPChassisType = 116
+	NDPChassisNortelNetworksVPNGateway3050                NDPChassisType = 117
+	NDPChassisAlteonSSL31010100                           NDPChassisType = 118
+	NDPChassisAlteonSSL31010100Fiber                      NDPChassisType = 119
+	NDPChassisAlteonSSL31010100FIPS                       NDPChassisType = 120
+	NDPChassisAlteonSSL410101001000                       NDPChassisType = 121
+	NDPChassisAlteonSSL410101001000Fiber                  NDPChassisType = 122
+	NDPChassisAlteonApplicationSwitch2424SSL              NDPChassisType = 123
+	NDPChassisEthernetSwitch32524T                        NDPChassisType = 124
+	NDPChassisEthernetSwitch32524G                        NDPChassisType = 125
+	NDPChassisNortelNetworksWirelessLANAccessPoint2225    NDPChassisType = 126
+	NDPChassisNortelNetworksWirelessLANSecuritySwitch2270 NDPChassisType = 127
+	NDPChassis24portEthernetSwitch47024TPWR               NDPChassisType = 128
+	NDPChassis48portEthernetSwitch47048TPWR               NDPChassisType = 129
+	NDPChassisEthernetRoutingSwitch553024TFD              NDPChassisType = 130
+	NDPChassisEthernetSwitch351024T                       NDPChassisType = 131
+	NDPChassisNortelMetroEthernetServiceUnit12GACL3Switch NDPChassisType = 132
+	NDPChassisNortelMetroEthernetServiceUnit12GDCL3Switch NDPChassisType = 133
+	NDPChassisNortelSecureAccessSwitch                    NDPChassisType = 134
+	NDPChassisNortelNetworksVPNGateway3070                NDPChassisType = 135
+	NDPChassisOPTeraMetro3500                             NDPChassisType = 136
+	NDPChassisSMBBES101024T                               NDPChassisType = 137
+	NDPChassisSMBBES101048T                               NDPChassisType = 138
+	NDPChassisSMBBES102024TPWR                            NDPChassisType = 139
+	NDPChassisSMBBES102048TPWR                            NDPChassisType = 140
+	NDPChassisSMBBES201024T                               NDPChassisType = 141
+	NDPChassisSMBBES201048T                               NDPChassisType = 142
+	NDPChassisSMBBES202024TPWR                            NDPChassisType = 143
+	NDPChassisSMBBES202048TPWR                            NDPChassisType = 144
+	NDPChassisSMBBES11024T                                NDPChassisType = 145
+	NDPChassisSMBBES11048T                                NDPChassisType = 146
+	NDPChassisSMBBES12024TPWR                             NDPChassisType = 147
+	NDPChassisSMBBES12048TPWR                             NDPChassisType = 148
+	NDPChassisSMBBES21024T                                NDPChassisType = 149
+	NDPChassisSMBBES21048T                                NDPChassisType = 150
+	NDPChassisSMBBES22024TPWR                             NDPChassisType = 151
+	NDPChassisSMBBES22048TPWR                             NDPChassisType = 152
+	NDPChassisOME6500                                     NDPChassisType = 153
+	NDPChassisEthernetRoutingSwitch4548GT                 NDPChassisType = 154
+	NDPChassisEthernetRoutingSwitch4548GTPWR              NDPChassisType = 155
+	NDPChassisEthernetRoutingSwitch4550T                  NDPChassisType = 156
+	NDPChassisEthernetRoutingSwitch4550TPWR               NDPChassisType = 157
+	NDPChassisEthernetRoutingSwitch4526FX                 NDPChassisType = 158
+	NDPChassisEthernetRoutingSwitch250026T                NDPChassisType = 159
+	NDPChassisEthernetRoutingSwitch250026TPWR             NDPChassisType = 160
+	NDPChassisEthernetRoutingSwitch250050T                NDPChassisType = 161
+	NDPChassisEthernetRoutingSwitch250050TPWR             NDPChassisType = 162
+)
+
+type NDPBackplaneType uint8
+
+// Nortel Backplane Types
+const (
+	NDPBackplaneOther                                       NDPBackplaneType = 1
+	NDPBackplaneEthernet                                    NDPBackplaneType = 2
+	NDPBackplaneEthernetTokenring                           NDPBackplaneType = 3
+	NDPBackplaneEthernetFDDI                                NDPBackplaneType = 4
+	NDPBackplaneEthernetTokenringFDDI                       NDPBackplaneType = 5
+	NDPBackplaneEthernetTokenringRedundantPower             NDPBackplaneType = 6
+	NDPBackplaneEthernetTokenringFDDIRedundantPower         NDPBackplaneType = 7
+	NDPBackplaneTokenRing                                   NDPBackplaneType = 8
+	NDPBackplaneEthernetTokenringFastEthernet               NDPBackplaneType = 9
+	NDPBackplaneEthernetFastEthernet                        NDPBackplaneType = 10
+	NDPBackplaneEthernetTokenringFastEthernetRedundantPower NDPBackplaneType = 11
+	NDPBackplaneEthernetFastEthernetGigabitEthernet         NDPBackplaneType = 12
+)
+
+type NDPState uint8
+
+// Device State
+const (
+	NDPStateTopology  NDPState = 1
+	NDPStateHeartbeat NDPState = 2
+	NDPStateNew       NDPState = 3
+)
+
+// NortelDiscovery is a packet layer containing the Nortel Discovery Protocol.
+type NortelDiscovery struct {
+	BaseLayer
+	IPAddress net.IP
+	SegmentID []byte
+	Chassis   NDPChassisType
+	Backplane NDPBackplaneType
+	State     NDPState
+	NumLinks  uint8
+}
+
+// LayerType returns gopacket.LayerTypeNortelDiscovery.
+func (c *NortelDiscovery) LayerType() gopacket.LayerType {
+	return LayerTypeNortelDiscovery
+}
+
+func decodeNortelDiscovery(data []byte, p gopacket.PacketBuilder) error {
+	c := &NortelDiscovery{}
+	if len(data) < 11 {
+		return fmt.Errorf("Invalid NortelDiscovery packet length %d", len(data))
+	}
+	c.IPAddress = data[0:4]
+	c.SegmentID = data[4:7]
+	c.Chassis = NDPChassisType(data[7])
+	c.Backplane = NDPBackplaneType(data[8])
+	c.State = NDPState(data[9])
+	c.NumLinks = uint8(data[10])
+	p.AddLayer(c)
+	return nil
+}
+
+func (t NDPChassisType) String() (s string) {
+	switch t {
+	case NDPChassisother:
+		s = "other"
+	case NDPChassis3000:
+		s = "3000"
+	case NDPChassis3030:
+		s = "3030"
+	case NDPChassis2310:
+		s = "2310"
+	case NDPChassis2810:
+		s = "2810"
+	case NDPChassis2912:
+		s = "2912"
+	case NDPChassis2914:
+		s = "2914"
+	case NDPChassis271x:
+		s = "271x"
+	case NDPChassis2813:
+		s = "2813"
+	case NDPChassis2814:
+		s = "2814"
+	case NDPChassis2915:
+		s = "2915"
+	case NDPChassis5000:
+		s = "5000"
+	case NDPChassis2813SA:
+		s = "2813SA"
+	case NDPChassis2814SA:
+		s = "2814SA"
+	case NDPChassis810M:
+		s = "810M"
+	case NDPChassisEthercell:
+		s = "Ethercell"
+	case NDPChassis5005:
+		s = "5005"
+	case NDPChassisAlcatelEWC:
+		s = "Alcatel Ethernet workgroup conc."
+	case NDPChassis2715SA:
+		s = "2715SA"
+	case NDPChassis2486:
+		s = "2486"
+	case NDPChassis28000series:
+		s = "28000 series"
+	case NDPChassis23000series:
+		s = "23000 series"
+	case NDPChassis5DN00xseries:
+		s = "5DN00x series"
+	case NDPChassisBayStackEthernet:
+		s = "BayStack Ethernet"
+	case NDPChassis23100series:
+		s = "23100 series"
+	case NDPChassis100BaseTHub:
+		s = "100Base-T Hub"
+	case NDPChassis3000FastEthernet:
+		s = "3000 Fast Ethernet"
+	case NDPChassisOrionSwitch:
+		s = "Orion switch"
+	case NDPChassisDDS:
+		s = "DDS"
+	case NDPChassisCentillion6slot:
+		s = "Centillion (6 slot)"
+	case NDPChassisCentillion12slot:
+		s = "Centillion (12 slot)"
+	case NDPChassisCentillion1slot:
+		s = "Centillion (1 slot)"
+	case NDPChassisBayStack301:
+		s = "BayStack 301"
+	case NDPChassisBayStackTokenRingHub:
+		s = "BayStack TokenRing Hub"
+	case NDPChassisFVCMultimediaSwitch:
+		s = "FVC Multimedia Switch"
+	case NDPChassisSwitchNode:
+		s = "Switch Node"
+	case NDPChassisBayStack302Switch:
+		s = "BayStack 302 Switch"
+	case NDPChassisBayStack350Switch:
+		s = "BayStack 350 Switch"
+	case NDPChassisBayStack150EthernetHub:
+		s = "BayStack 150 Ethernet Hub"
+	case NDPChassisCentillion50NSwitch:
+		s = "Centillion 50N switch"
+	case NDPChassisCentillion50TSwitch:
+		s = "Centillion 50T switch"
+	case NDPChassisBayStack303304Switches:
+		s = "BayStack 303 and 304 Switches"
+	case NDPChassisBayStack200EthernetHub:
+		s = "BayStack 200 Ethernet Hub"
+	case NDPChassisBayStack25010100EthernetHub:
+		s = "BayStack 250 10/100 Ethernet Hub"
+	case NDPChassisBayStack450101001000Switches:
+		s = "BayStack 450 10/100/1000 Switches"
+	case NDPChassisBayStack41010100Switches:
+		s = "BayStack 410 10/100 Switches"
+	case NDPChassisPassport1200L3Switch:
+		s = "Passport 1200 L3 Switch"
+	case NDPChassisPassport1250L3Switch:
+		s = "Passport 1250 L3 Switch"
+	case NDPChassisPassport1100L3Switch:
+		s = "Passport 1100 L3 Switch"
+	case NDPChassisPassport1150L3Switch:
+		s = "Passport 1150 L3 Switch"
+	case NDPChassisPassport1050L3Switch:
+		s = "Passport 1050 L3 Switch"
+	case NDPChassisPassport1051L3Switch:
+		s = "Passport 1051 L3 Switch"
+	case NDPChassisPassport8610L3Switch:
+		s = "Passport 8610 L3 Switch"
+	case NDPChassisPassport8606L3Switch:
+		s = "Passport 8606 L3 Switch"
+	case NDPChassisPassport8010:
+		s = "Passport 8010"
+	case NDPChassisPassport8006:
+		s = "Passport 8006"
+	case NDPChassisBayStack670wirelessaccesspoint:
+		s = "BayStack 670 wireless access point"
+	case NDPChassisPassport740:
+		s = "Passport 740"
+	case NDPChassisPassport750:
+		s = "Passport 750"
+	case NDPChassisPassport790:
+		s = "Passport 790"
+	case NDPChassisBusinessPolicySwitch200010100Switches:
+		s = "Business Policy Switch 2000 10/100 Switches"
+	case NDPChassisPassport8110L2Switch:
+		s = "Passport 8110 L2 Switch"
+	case NDPChassisPassport8106L2Switch:
+		s = "Passport 8106 L2 Switch"
+	case NDPChassisBayStack3580GigSwitch:
+		s = "BayStack 3580 Gig Switch"
+	case NDPChassisBayStack10PowerSupplyUnit:
+		s = "BayStack 10 Power Supply Unit"
+	case NDPChassisBayStack42010100Switch:
+		s = "BayStack 420 10/100 Switch"
+	case NDPChassisOPTeraMetro1200EthernetServiceModule:
+		s = "OPTera Metro 1200 Ethernet Service Module"
+	case NDPChassisOPTera8010co:
+		s = "OPTera 8010co"
+	case NDPChassisOPTera8610coL3Switch:
+		s = "OPTera 8610co L3 switch"
+	case NDPChassisOPTera8110coL2Switch:
+		s = "OPTera 8110co L2 switch"
+	case NDPChassisOPTera8003:
+		s = "OPTera 8003"
+	case NDPChassisOPTera8603L3Switch:
+		s = "OPTera 8603 L3 switch"
+	case NDPChassisOPTera8103L2Switch:
+		s = "OPTera 8103 L2 switch"
+	case NDPChassisBayStack380101001000Switch:
+		s = "BayStack 380 10/100/1000 Switch"
+	case NDPChassisEthernetSwitch47048T:
+		s = "Ethernet Switch 470-48T"
+	case NDPChassisOPTeraMetro1450EthernetServiceModule:
+		s = "OPTera Metro 1450 Ethernet Service Module"
+	case NDPChassisOPTeraMetro1400EthernetServiceModule:
+		s = "OPTera Metro 1400 Ethernet Service Module"
+	case NDPChassisAlteonSwitchFamily:
+		s = "Alteon Switch Family"
+	case NDPChassisEthernetSwitch46024TPWR:
+		s = "Ethernet Switch 460-24T-PWR"
+	case NDPChassisOPTeraMetro8010OPML2Switch:
+		s = "OPTera Metro 8010 OPM L2 Switch"
+	case NDPChassisOPTeraMetro8010coOPML2Switch:
+		s = "OPTera Metro 8010co OPM L2 Switch"
+	case NDPChassisOPTeraMetro8006OPML2Switch:
+		s = "OPTera Metro 8006 OPM L2 Switch"
+	case NDPChassisOPTeraMetro8003OPML2Switch:
+		s = "OPTera Metro 8003 OPM L2 Switch"
+	case NDPChassisAlteon180e:
+		s = "Alteon 180e"
+	case NDPChassisAlteonAD3:
+		s = "Alteon AD3"
+	case NDPChassisAlteon184:
+		s = "Alteon 184"
+	case NDPChassisAlteonAD4:
+		s = "Alteon AD4"
+	case NDPChassisPassport1424L3Switch:
+		s = "Passport 1424 L3 switch"
+	case NDPChassisPassport1648L3Switch:
+		s = "Passport 1648 L3 switch"
+	case NDPChassisPassport1612L3Switch:
+		s = "Passport 1612 L3 switch"
+	case NDPChassisPassport1624L3Switch:
+		s = "Passport 1624 L3 switch"
+	case NDPChassisBayStack38024FFiber1000Switch:
+		s = "BayStack 380-24F Fiber 1000 Switch"
+	case NDPChassisEthernetRoutingSwitch551024T:
+		s = "Ethernet Routing Switch 5510-24T"
+	case NDPChassisEthernetRoutingSwitch551048T:
+		s = "Ethernet Routing Switch 5510-48T"
+	case NDPChassisEthernetSwitch47024T:
+		s = "Ethernet Switch 470-24T"
+	case NDPChassisNortelNetworksWirelessLANAccessPoint2220:
+		s = "Nortel Networks Wireless LAN Access Point 2220"
+	case NDPChassisPassportRBS2402L3Switch:
+		s = "Passport RBS 2402 L3 switch"
+	case NDPChassisAlteonApplicationSwitch2424:
+		s = "Alteon Application Switch 2424"
+	case NDPChassisAlteonApplicationSwitch2224:
+		s = "Alteon Application Switch 2224"
+	case NDPChassisAlteonApplicationSwitch2208:
+		s = "Alteon Application Switch 2208"
+	case NDPChassisAlteonApplicationSwitch2216:
+		s = "Alteon Application Switch 2216"
+	case NDPChassisAlteonApplicationSwitch3408:
+		s = "Alteon Application Switch 3408"
+	case NDPChassisAlteonApplicationSwitch3416:
+		s = "Alteon Application Switch 3416"
+	case NDPChassisNortelNetworksWirelessLANSecuritySwitch2250:
+		s = "Nortel Networks Wireless LAN SecuritySwitch 2250"
+	case NDPChassisEthernetSwitch42548T:
+		s = "Ethernet Switch 425-48T"
+	case NDPChassisEthernetSwitch42524T:
+		s = "Ethernet Switch 425-24T"
+	case NDPChassisNortelNetworksWirelessLANAccessPoint2221:
+		s = "Nortel Networks Wireless LAN Access Point 2221"
+	case NDPChassisNortelMetroEthernetServiceUnit24TSPFswitch:
+		s = "Nortel Metro Ethernet Service Unit 24-T SPF switch"
+	case NDPChassisNortelMetroEthernetServiceUnit24TLXDCswitch:
+		s = " Nortel Metro Ethernet Service Unit 24-T LX DC switch"
+	case NDPChassisPassport830010slotchassis:
+		s = "Passport 8300 10-slot chassis"
+	case NDPChassisPassport83006slotchassis:
+		s = "Passport 8300 6-slot chassis"
+	case NDPChassisEthernetRoutingSwitch552024TPWR:
+		s = "Ethernet Routing Switch 5520-24T-PWR"
+	case NDPChassisEthernetRoutingSwitch552048TPWR:
+		s = "Ethernet Routing Switch 5520-48T-PWR"
+	case NDPChassisNortelNetworksVPNGateway3050:
+		s = "Nortel Networks VPN Gateway 3050"
+	case NDPChassisAlteonSSL31010100:
+		s = "Alteon SSL 310 10/100"
+	case NDPChassisAlteonSSL31010100Fiber:
+		s = "Alteon SSL 310 10/100 Fiber"
+	case NDPChassisAlteonSSL31010100FIPS:
+		s = "Alteon SSL 310 10/100 FIPS"
+	case NDPChassisAlteonSSL410101001000:
+		s = "Alteon SSL 410 10/100/1000"
+	case NDPChassisAlteonSSL410101001000Fiber:
+		s = "Alteon SSL 410 10/100/1000 Fiber"
+	case NDPChassisAlteonApplicationSwitch2424SSL:
+		s = "Alteon Application Switch 2424-SSL"
+	case NDPChassisEthernetSwitch32524T:
+		s = "Ethernet Switch 325-24T"
+	case NDPChassisEthernetSwitch32524G:
+		s = "Ethernet Switch 325-24G"
+	case NDPChassisNortelNetworksWirelessLANAccessPoint2225:
+		s = "Nortel Networks Wireless LAN Access Point 2225"
+	case NDPChassisNortelNetworksWirelessLANSecuritySwitch2270:
+		s = "Nortel Networks Wireless LAN SecuritySwitch 2270"
+	case NDPChassis24portEthernetSwitch47024TPWR:
+		s = "24-port Ethernet Switch 470-24T-PWR"
+	case NDPChassis48portEthernetSwitch47048TPWR:
+		s = "48-port Ethernet Switch 470-48T-PWR"
+	case NDPChassisEthernetRoutingSwitch553024TFD:
+		s = "Ethernet Routing Switch 5530-24TFD"
+	case NDPChassisEthernetSwitch351024T:
+		s = "Ethernet Switch 3510-24T"
+	case NDPChassisNortelMetroEthernetServiceUnit12GACL3Switch:
+		s = "Nortel Metro Ethernet Service Unit 12G AC L3 switch"
+	case NDPChassisNortelMetroEthernetServiceUnit12GDCL3Switch:
+		s = "Nortel Metro Ethernet Service Unit 12G DC L3 switch"
+	case NDPChassisNortelSecureAccessSwitch:
+		s = "Nortel Secure Access Switch"
+	case NDPChassisNortelNetworksVPNGateway3070:
+		s = "Nortel Networks VPN Gateway 3070"
+	case NDPChassisOPTeraMetro3500:
+		s = "OPTera Metro 3500"
+	case NDPChassisSMBBES101024T:
+		s = "SMB BES 1010 24T"
+	case NDPChassisSMBBES101048T:
+		s = "SMB BES 1010 48T"
+	case NDPChassisSMBBES102024TPWR:
+		s = "SMB BES 1020 24T PWR"
+	case NDPChassisSMBBES102048TPWR:
+		s = "SMB BES 1020 48T PWR"
+	case NDPChassisSMBBES201024T:
+		s = "SMB BES 2010 24T"
+	case NDPChassisSMBBES201048T:
+		s = "SMB BES 2010 48T"
+	case NDPChassisSMBBES202024TPWR:
+		s = "SMB BES 2020 24T PWR"
+	case NDPChassisSMBBES202048TPWR:
+		s = "SMB BES 2020 48T PWR"
+	case NDPChassisSMBBES11024T:
+		s = "SMB BES 110 24T"
+	case NDPChassisSMBBES11048T:
+		s = "SMB BES 110 48T"
+	case NDPChassisSMBBES12024TPWR:
+		s = "SMB BES 120 24T PWR"
+	case NDPChassisSMBBES12048TPWR:
+		s = "SMB BES 120 48T PWR"
+	case NDPChassisSMBBES21024T:
+		s = "SMB BES 210 24T"
+	case NDPChassisSMBBES21048T:
+		s = "SMB BES 210 48T"
+	case NDPChassisSMBBES22024TPWR:
+		s = "SMB BES 220 24T PWR"
+	case NDPChassisSMBBES22048TPWR:
+		s = "SMB BES 220 48T PWR"
+	case NDPChassisOME6500:
+		s = "OME 6500"
+	case NDPChassisEthernetRoutingSwitch4548GT:
+		s = "Ethernet Routing Switch 4548GT"
+	case NDPChassisEthernetRoutingSwitch4548GTPWR:
+		s = "Ethernet Routing Switch 4548GT-PWR"
+	case NDPChassisEthernetRoutingSwitch4550T:
+		s = "Ethernet Routing Switch 4550T"
+	case NDPChassisEthernetRoutingSwitch4550TPWR:
+		s = "Ethernet Routing Switch 4550T-PWR"
+	case NDPChassisEthernetRoutingSwitch4526FX:
+		s = "Ethernet Routing Switch 4526FX"
+	case NDPChassisEthernetRoutingSwitch250026T:
+		s = "Ethernet Routing Switch 2500-26T"
+	case NDPChassisEthernetRoutingSwitch250026TPWR:
+		s = "Ethernet Routing Switch 2500-26T-PWR"
+	case NDPChassisEthernetRoutingSwitch250050T:
+		s = "Ethernet Routing Switch 2500-50T"
+	case NDPChassisEthernetRoutingSwitch250050TPWR:
+		s = "Ethernet Routing Switch 2500-50T-PWR"
+	default:
+		s = "Unknown"
+	}
+	return
+}
+
+func (t NDPBackplaneType) String() (s string) {
+	switch t {
+	case NDPBackplaneOther:
+		s = "Other"
+	case NDPBackplaneEthernet:
+		s = "Ethernet"
+	case NDPBackplaneEthernetTokenring:
+		s = "Ethernet and Tokenring"
+	case NDPBackplaneEthernetFDDI:
+		s = "Ethernet and FDDI"
+	case NDPBackplaneEthernetTokenringFDDI:
+		s = "Ethernet, Tokenring and FDDI"
+	case NDPBackplaneEthernetTokenringRedundantPower:
+		s = "Ethernet and Tokenring with redundant power"
+	case NDPBackplaneEthernetTokenringFDDIRedundantPower:
+		s = "Ethernet, Tokenring, FDDI with redundant power"
+	case NDPBackplaneTokenRing:
+		s = "Token Ring"
+	case NDPBackplaneEthernetTokenringFastEthernet:
+		s = "Ethernet, Tokenring and Fast Ethernet"
+	case NDPBackplaneEthernetFastEthernet:
+		s = "Ethernet and Fast Ethernet"
+	case NDPBackplaneEthernetTokenringFastEthernetRedundantPower:
+		s = "Ethernet, Tokenring, Fast Ethernet with redundant power"
+	case NDPBackplaneEthernetFastEthernetGigabitEthernet:
+		s = "Ethernet, Fast Ethernet and Gigabit Ethernet"
+	default:
+		s = "Unknown"
+	}
+	return
+}
+
+func (t NDPState) String() (s string) {
+	switch t {
+	case NDPStateTopology:
+		s = "Topology Change"
+	case NDPStateHeartbeat:
+		s = "Heartbeat"
+	case NDPStateNew:
+		s = "New"
+	default:
+		s = "Unknown"
+	}
+	return
+}