Packet CAPture (PCAP)

Created

2026-04-13

Last Updated

2026-04-14

Available Formats

PCAP-Related LinkTypes

Reference

RFC-ietf-opsawg-pcaplinktype-18: Link-Layer Types for PCAP-related Capture File Formats

Available Formats

Range	Registration Procedures
0-65000	Expert Review
65001-65535	Experimental Use

Value	Name	Description	Change Controller	Reference
0	LINKTYPE_NULL	BSD loopback encapsulation	[email protected]	LINKTYPE_NULL
1	LINKTYPE_ETHERNET	IEEE 802.3 Ethernet	[email protected]	LINKTYPE_ETHERNET
2	LINKTYPE_EXP_ETHERNET	Xerox experimental 3Mb Ethernet	[email protected]	PracConsEthDesign
3	LINKTYPE_AX25	AX.25 layer 2 packets	[email protected]	LINKTYPE_AX25
4	LINKTYPE_PRONET	Proteon PRONet Token Ring	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
5	LINKTYPE_CHAOS	MIT Chaosnet	[email protected]	AIM-628
6	LINKTYPE_IEEE802_5	IEEE 802.5 Token Ring	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
7	LINKTYPE_ARCNET_BSD	ARCNET Data Packets with BSD encapsulation	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
8	LINKTYPE_SLIP	SLIP, with a direction header	[email protected]	LINKTYPE_SLIP
9	LINKTYPE_PPP	PPP	[email protected]	LINKTYPE_PPP
10	LINKTYPE_FDDI	FDDI: per ANSI INCITS 239-1994	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
11-49	Reserved	Do not use these values		https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
50	LINKTYPE_PPP_HDLC	PPP in HDLC-like framing	[email protected]	LINKTYPE_PPP_HDLC
51	LINKTYPE_PPP_ETHER	PPPoE session packets	[email protected]	LINKTYPE_PPP_ETHER
52-98	Reserved	Used historically by NetBSD		https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
99	LINKTYPE_SYMANTEC_FIREWALL	Symantec Enterprise Firewall	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
100	LINKTYPE_ATM_RFC1483	LLC/SNAP-encapsulated ATM	[email protected]	LINKTYPE_ATM_RFC1483
101	LINKTYPE_RAW	IP without link-layer headers	[email protected]	LINKTYPE_RAW; RFC 791; RFC 8200
102	LINKTYPE_SLIP_BSDOS	BSD/OS SLIP BPF header	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
103	LINKTYPE_PPP_BSDOS	BSD/OS PPP BPF header	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
104	LINKTYPE_C_HDLC	Cisco PPP with HDLC framing	[email protected]	LINKTYPE_C_HDLC
105	LINKTYPE_IEEE802_11	IEEE 802.11 wireless LAN	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
106	LINKTYPE_ATM_CLIP	ATM Classical IP, with no header preceding IP	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
107	LINKTYPE_FRELAY	Frame Relay LAPF	[email protected]	LINKTYPE_FRELAY
108	LINKTYPE_LOOP	OpenBSD loopback encapsulation	[email protected]	LINKTYPE_LOOP
109	LINKTYPE_ENC	OpenBSD IPsec encapsulation	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
110	LINKTYPE_LANE8023	ATM LANE + 802.3	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
111	LINKTYPE_HIPPI	NetBSD HIPPI	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
112	LINKTYPE_HDLC	NetBSD HDLC framing	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
113	LINKTYPE_LINUX_SLL	Linux "cooked" capture encapsulation	[email protected]	LINKTYPE_LINUX_SLL
114	LINKTYPE_LTALK	Apple LocalTalk	[email protected]	LINKTYPE_LTALK
115	LINKTYPE_ECONET	Acorn Econet	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
116	LINKTYPE_IPFILTER	OpenBSD ipfilter	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
117	LINKTYPE_PFLOG	PF packet filter logging	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
118	LINKTYPE_CISCO_IOS	Cisco-internal use	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
119	LINKTYPE_IEEE802_11_PRISM	IEEE 802.11 wireless LAN, preceded by a Prism monitor mode header	[email protected]	LINKTYPE_IEEE802_11_PRISM
120	LINKTYPE_IEEE802_11_AIRONET	802.11 + FreeBSD Aironet radio metadata	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
121	LINKTYPE_HHDLC	Siemens HiPath HDLC	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
122	LINKTYPE_IP_OVER_FC	IP and ATM over Fibre Channel	[email protected]	LINKTYPE_IP_OVER_FC
123	LINKTYPE_SUNATM	ATM traffic captured from a SunATM device	[email protected]	LINKTYPE_SUNATM
124	LINKTYPE_RIO	RapidIO	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
125	LINKTYPE_PCI_EXP	PCI Express	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
126	LINKTYPE_AURORA	Xilinx Aurora link layer	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
127	LINKTYPE_IEEE802_11_RADIOTAP	IEEE 802.11 wireless LAN, preceded by a Radiotap header	[email protected]	Radiotap
128	LINKTYPE_TZSP	Tazmen Sniffer Protocol	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
129	LINKTYPE_ARCNET_LINUX	ARCNET Data Packets with Linux encapsulation	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
130	LINKTYPE_JUNIPER_MLPPP	Juniper Networks	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
131	LINKTYPE_JUNIPER_MLFR	Juniper Networks	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
132	LINKTYPE_JUNIPER_ES	Juniper Networks	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
133	LINKTYPE_JUNIPER_GGSN	Juniper Networks	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
134	LINKTYPE_JUNIPER_MFR	Juniper Networks	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
135	LINKTYPE_JUNIPER_ATM2	Juniper Networks	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
136	LINKTYPE_JUNIPER_SERVICES	Juniper Networks	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
137	LINKTYPE_JUNIPER_ATM1	Juniper Networks	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
138	LINKTYPE_APPLE_IP_OVER_IEEE1394	Apple IP-over-IEEE 1394 cooked header	[email protected]	LINKTYPE_APPLE_IP_OVER_IEEE1394
139	LINKTYPE_MTP2_WITH_PHDR	SS7 MTP2 frames, with a pseudo-header	[email protected]	LINKTYPE_MTP2_WITH_PHDR
140	LINKTYPE_MTP2	SS7 MTP2 packets	[email protected]	LINKTYPE_MTP2
141	LINKTYPE_MTP3	SS7 MTP3 packets	[email protected]	LINKTYPE_MTP3
142	LINKTYPE_SCCP	SS7 SCCP packets	[email protected]	LINKTYPE_SCCP
143	LINKTYPE_DOCSIS	DOCSIS MAC frames	[email protected]	DOCSIS-4.0-MULP
144	LINKTYPE_LINUX_IRDA	Linux-IrDA packets	[email protected]	LINKTYPE_LINUX_IRDA
145	LINKTYPE_IBM_SP	IBM SP switch	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
146	LINKTYPE_IBM_SN	IBM Next Federation switch	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
147	LINKTYPE_RESERVED_01	For private use (deprecated)	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
148	LINKTYPE_RESERVED_02	For private use (deprecated)	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
149	LINKTYPE_RESERVED_03	For private use (deprecated)	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
150	LINKTYPE_RESERVED_04	For private use (deprecated)	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
151	LINKTYPE_RESERVED_05	For private use (deprecated)	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
152	LINKTYPE_RESERVED_06	For private use (deprecated)	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
153	LINKTYPE_RESERVED_07	For private use (deprecated)	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
154	LINKTYPE_RESERVED_08	For private use (deprecated)	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
155	LINKTYPE_RESERVED_09	For private use (deprecated)	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
156	LINKTYPE_RESERVED_10	For private use (deprecated)	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
157	LINKTYPE_RESERVED_11	For private use (deprecated)	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
158	LINKTYPE_RESERVED_12	For private use (deprecated)	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
159	LINKTYPE_RESERVED_13	For private use (deprecated)	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
160	LINKTYPE_RESERVED_14	For private use (deprecated)	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
161	LINKTYPE_RESERVED_15	For private use (deprecated)	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
162	LINKTYPE_RESERVED_16	For private use (deprecated)	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
163	LINKTYPE_IEEE802_11_AVS	IEEE 802.11 wireless LAN, preceded by an AVS header	[email protected]	AVS
164	LINKTYPE_JUNIPER_MONITOR	Juniper Networks	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
165	LINKTYPE_BACNET_MS_TP	BACnet MS/TP frames	[email protected]	LINKTYPE_BACNET_MS_TP
166	LINKTYPE_PPP_PPPD	PPP preceded by a direction octet and an HDLC-like control field	[email protected]	LINKTYPE_PPP_PPPD
167	LINKTYPE_JUNIPER_PPPOE	Juniper Networks	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
168	LINKTYPE_JUNIPER_PPPOE_ATM	Juniper Networks	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
169	LINKTYPE_GPRS_LLC	General Packet Radio Service Logical Link Control, as per 3GPP TS 04.64	[email protected]	3GPP TS 04.64
170	LINKTYPE_GPF_T	Transparent-mapped generic framing procedure	[email protected]	G.7041
171	LINKTYPE_GPF_F	Frame-mapped generic framing procedure	[email protected]	G.7041
172	LINKTYPE_GCOM_T1E1	Gcom T1/E1 line monitoring equipment	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
173	LINKTYPE_GCOM_SERIAL	Gcom T1/E1 line monitoring equipment	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
174	LINKTYPE_JUNIPER_PIC_PEER	Juniper Networks	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
175	LINKTYPE_ERF_ETH	Endace TYPE_ETH ERF records	[email protected]	LINKTYPE_ERF
176	LINKTYPE_ERF_POS	Endace TYPE_POS_HDLC ERF records	[email protected]	LINKTYPE_ERF
177	LINKTYPE_LINUX_LAPD	Linux vISDN LAPD frames	[email protected]	LINKTYPE_LINUX_LAPD
178	LINKTYPE_JUNIPER_ETHER	Juniper Networks	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
179	LINKTYPE_JUNIPER_PPP	Juniper Networks	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
180	LINKTYPE_JUNIPER_FRELAY	Juniper Networks	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
181	LINKTYPE_JUNIPER_CHDLC	Juniper Networks	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
182	LINKTYPE_MFR	FRF.16.1 Multi-Link Frame Relay frames	[email protected]	LINKTYPE_MFR
183	LINKTYPE_JUNIPER_VP	Juniper Networks	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
184	LINKTYPE_A429	ARINC 429 frames	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
185	LINKTYPE_A653_ICM	Arinc 653 Interpartition Communication messages	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
186	LINKTYPE_USB_FREEBSD	USB traffic captured on FreeBSD	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
187	LINKTYPE_BLUETOOTH_HCI_H4	Bluetooth HCI UART Transport Layer packets	[email protected]	LINKTYPE_BLUETOOTH_HCI_H4
188	LINKTYPE_IEEE802_16_MAC_CPS	IEEE 802.16 MAC Common Part Sublayer	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
189	LINKTYPE_USB_LINUX	USB packets, beginning with a Linux USB header	[email protected]	LINKTYPE_USB_LINUX
190	LINKTYPE_CAN20B	Controller Area Network (CAN) v. 2.0B packets	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
191	LINKTYPE_IEEE802_15_4_LINUX	IEEE 802.15.4 with address fields padded by Linux	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
192	LINKTYPE_PPI	Per-Packet Information header preceding packet data	[email protected]	LINKTYPE_PPI
193	LINKTYPE_IEEE802_16_MAC_CPS_RADIO	802.16 MAC Common Part Sublayer plus radio header	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
194	LINKTYPE_JUNIPER_ISM	Juniper Networks	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
195	LINKTYPE_IEEE802_15_4_WITHFCS	IEEE 802.15.4 with FCS	[email protected]	LINKTYPE_IEEE802_15_4_WITHFCS
196	LINKTYPE_SITA	Various link-layer types, with a pseudo-header	[email protected]	LINKTYPE_SITA
197	LINKTYPE_ERF	Endace ERF records	[email protected]	LINKTYPE_ERF
198	LINKTYPE_RAIF1	Ethernet packets captured from a u10 Networks board	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
199	LINKTYPE_IPMB_KONTRON	IPMB packet for IPMI, with a 2-octet header	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
200	LINKTYPE_JUNIPER_ST	Juniper Networks	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
201	LINKTYPE_BLUETOOTH_HCI_H4_WITH_PHDR	Bluetooth HCI UART Transport Layer packets with a direction pseudo-header	[email protected]	LINKTYPE_BLUETOOTH_HCI_H4_WITH_PHDR
202	LINKTYPE_AX25_KISS	KISS frames between a host and an AX.25 TNC	[email protected]	LINKTYPE_AX25_KISS
203	LINKTYPE_LAPD	Q.921 LAPD frames	[email protected]	LINKTYPE_LAPD
204	LINKTYPE_PPP_WITH_DIR	PPP, with a direction header	[email protected]	LINKTYPE_PPP_WITH_DIR
205	LINKTYPE_C_HDLC_WITH_DIR	Cisco PPP with HDLC framing, with a direction header	[email protected]	LINKTYPE_C_HDLC_WITH_DIR
206	LINKTYPE_FRELAY_WITH_DIR	Frame Relay LAPF, with a direction header	[email protected]	LINKTYPE_FRELAY_WITH_DIR
207	LINKTYPE_LAPB_WITH_DIR	X.25 LAPB, with a direction header	[email protected]	LINKTYPE_LAPB_WITH_DIR
208	WillBarker-Proprietary	Proprietary Link-Layer type	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
209	LINKTYPE_I2C_LINUX	Linux I2C packets	[email protected]	LINKTYPE_I2C_LINUX
210	LINKTYPE_FLEXRAY	FlexRay frames or symbols, with a pseudo-header	[email protected]	LINKTYPE_FLEXRAY
211	LINKTYPE_MOST	Media Oriented Systems Transport (MOST) bus	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
212	LINKTYPE_LIN	Local Interconnect Network (LIN) automotive bus, with a metadata header	[email protected]	LINKTYPE_LIN
213	LINKTYPE_X2E_SERIAL	X2E serial line captures	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
214	LINKTYPE_X2E_XORAYA	X2E Xoraya data loggers	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
215	LINKTYPE_IEEE802_15_4_NONASK_PHY	IEEE 802.15.4 with PHY header	[email protected]	LINKTYPE_IEEE802_15_4_NONASK_PHY
216	LINKTYPE_LINUX_EVDEV	Linux evdev messages	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
217	LINKTYPE_GSMTAP_UM	GSM Um interface, with gsmtap header	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
218	LINKTYPE_GSMTAP_ABIS	GSM Abis interface, with gsmtap header	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
219	LINKTYPE_MPLS	MPLS packets with MPLS label as the header	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
220	LINKTYPE_USB_LINUX_MMAPPED	USB packets, beginning with an extended Linux USB header	[email protected]	LINKTYPE_USB_LINUX_MMAPPED
221	LINKTYPE_DECT	DECT packets, with a pseudo-header	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
222	LINKTYPE_AOS	OS Space Data Link Protocol	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
223	LINKTYPE_WIHART	Wireless HART (Highway Addressable Remote Transducer)	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
224	LINKTYPE_FC_2	Fibre Channel FC-2 frames	[email protected]	LINKTYPE_FC_2
225	LINKTYPE_FC_2_WITH_FRAME_DELIMS	Fibre Channel FC-2 frames with SOF and EOF	[email protected]	LINKTYPE_FC_2_WITH_FRAME_DELIMS
226	LINKTYPE_IPNET	Solaris ipnet	[email protected]	LINKTYPE_IPNET
227	LINKTYPE_CAN_SOCKETCAN	Controller Area Network (CAN) frames, with a metadata header	[email protected]	LINKTYPE_CAN_SOCKETCAN
228	LINKTYPE_IPV4	IPv4 without link-layer headers	[email protected]	LINKTYPE_IPV4; RFC 791
229	LINKTYPE_IPV6	IPv6 without link-layer headers	[email protected]	LINKTYPE_IPV6; RFC 8200
230	LINKTYPE_IEEE802_15_4_NOFCS	IEEE 802.15.4 without FCS	[email protected]	LINKTYPE_IEEE802_15_4_NOFCS
231	LINKTYPE_DBUS	D-Bus messages	[email protected]	LINKTYPE_DBUS
232	LINKTYPE_JUNIPER_VS	Juniper Networks	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
233	LINKTYPE_JUNIPER_SRX_E2E	Juniper Networks	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
234	LINKTYPE_JUNIPER_FIBRECHANNEL	Juniper Networks	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
235	LINKTYPE_DVB_CI	DVB-CI messages, with a pseudo-header	[email protected]	DVB-CI-PCAP
236	LINKTYPE_MUX27010	Variant of 3GPP TS 27.010 multiplexing protocol	[email protected]	LINKTYPE_MUX27010
237	LINKTYPE_STANAG_5066_D_PDU	STANAG 5066 D_PDUs	[email protected]	LINKTYPE_STANAG_5066_D_PDU
238	LINKTYPE_JUNIPER_ATM_CEMIC	Juniper Networks	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
239	LINKTYPE_NFLOG	Linux netlink NETLINK NFLOG socket log messages	[email protected]	LINKTYPE_NFLOG
240	LINKTYPE_NETANALYZER	Ethernet frames with netANALYZER pseudo-header	[email protected]	LINKTYPE_NETANALYZER
241	LINKTYPE_NETANALYZER_TRANSPARENT	Ethernet frames with netANALYZER pseudo-header, preamble, and SFD	[email protected]	LINKTYPE_NETANALYZER_TRANSPARENT
242	LINKTYPE_IPOIB	IP-over-InfiniBand	[email protected]	LINKTYPE_IPOIB
243	LINKTYPE_MPEG_2_TS	MPEG-2 Transport Stream transport packets	[email protected]	LINKTYPE_MPEG_2_TS
244	LINKTYPE_NG40	Frames from ng4T GmbH's ng40 protocol tester	[email protected]	LINKTYPE_NG40
245	LINKTYPE_NFC_LLCP	NFC Logical Link Control Protocol frames, with a pseudo-header	[email protected]	LINKTYPE_NFC_LLCP
246	LINKTYPE_PFSYNC	pfsync output	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
247	LINKTYPE_INFINIBAND	InfiniBand data packets	[email protected]	LINKTYPE_INFINIBAND
248	LINKTYPE_SCTP	SCTP packets, with no lower-level protocols such as IPv4 or IPv6	[email protected]	RFC 9260
249	LINKTYPE_USBPCAP	USB packets, beginning with a USBPcap header	[email protected]	USBPcap
250	LINKTYPE_RTAC_SERIAL	Serial-line packet from the Schweitzer Engineering Laboratories RTAC product	[email protected]	LINKTYPE_RTAC_SERIAL
251	LINKTYPE_BLUETOOTH_LE_LL	Bluetooth Low Energy link-layer packets	[email protected]	LINKTYPE_BLUETOOTH_LE_LL
252	LINKTYPE_WIRESHARK_UPPER_PDU	Wireshark	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
253	LINKTYPE_NETLINK	Linux Netlink capture encapsulation	[email protected]	LINKTYPE_NETLINK
254	LINKTYPE_BLUETOOTH_LINUX_MONITOR	Bluetooth Linux Monitor	[email protected]	LINKTYPE_BLUETOOTH_LINUX_MONITOR
255	LINKTYPE_BLUETOOTH_BREDR_BB	Bluetooth Basic Rate and Enhanced Data Rate baseband packets	[email protected]	LINKTYPE_BLUETOOTH_BREDR_BB
256	LINKTYPE_BLUETOOTH_LE_LL_WITH_PHDR	Bluetooth Low Energy link-layer packets	[email protected]	LINKTYPE_BLUETOOTH_LE_LL_WITH_PHDR
257	LINKTYPE_PROFIBUS_DL	PROFIBUS data link layer packets	[email protected]	LINKTYPE_PROFIBUS_DL
258	LINKTYPE_PKTAP	Apple PKTAP capture encapsulation	[email protected]	LINKTYPE_PKTAP
259	LINKTYPE_EPON	Ethernet-over-passive-optical-network packets, including preamble octets	[email protected]	LINKTYPE_EPON
260	LINKTYPE_IPMI_HPM_2	IPMI HPM.2 trace packets	[email protected]	LINKTYPE_IPMI_HPM_2
261	LINKTYPE_ZWAVE_R1_R2	Z-Wave RF profile R1 and R2 packets	[email protected]	LINKTYPE_ZWAVE_R1_R2
262	LINKTYPE_ZWAVE_R3	Z-Wave RF profile R3 packets	[email protected]	LINKTYPE_ZWAVE_R3
263	LINKTYPE_WATTSTOPPER_DLM	WattStopper Digital Lighting Management (DLM) and Legrand Nitoo Open protocol packets	[email protected]	LINKTYPE_WATTSTOPPER_DLM
264	LINKTYPE_ISO_14443	ISO 14443 contactless smartcard messages	[email protected]	ISO14443-PCAP
265	LINKTYPE_RDS	IEC 62106 Radio data system (RDS) groups	[email protected]	LINKTYPE_RDS
266	LINKTYPE_USB_DARWIN	USB packets captured on a Darwin-based operating system (macOS, etc.)	[email protected]	LINKTYPE_USB_DARWIN
267	LINKTYPE_OPENFLOW	OpenBSD DLT_OPENFLOW	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
268	LINKTYPE_SDLC	SNA SDLC packets	[email protected]	LINKTYPE_SDLC
269	LINKTYPE_TI_LLN_SNIFFER	Texas Instruments protocol sniffer	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
270	LINKTYPE_LORATAP	LoRaWan packets with a LoRaTap pseudo-header	[email protected]	LINKTYPE_LORATAP
271	LINKTYPE_VSOCK	Protocol for communication between host and guest machines in VMware and KVM hypervisors	[email protected]	LINKTYPE_VSOCK
272	LINKTYPE_NORDIC_BLE	Messages to and from a Nordic Semiconductor nRF Sniffer for Bluetooth LE packets	[email protected]	LINKTYPE_NORDIC_BLE
273	LINKTYPE_DOCSIS31_XRA31	DOCSIS packets and bursts, preceded by a pseudo-header	[email protected]	DOCSIS-XRA; DOCSIS-4.0-MULP
274	LINKTYPE_ETHERNET_MPACKET	IEEE 802.3 mPackets	[email protected]	LINKTYPE_ETHERNET_MPACKET
275	LINKTYPE_DISPLAYPORT_AUX	DisplayPort AUX channel monitoring messages	[email protected]	LINKTYPE_DISPLAYPORT_AUX
276	LINKTYPE_LINUX_SLL2	Linux cooked capture encapsulation v2	[email protected]	LINKTYPE_LINUX_SLL2
277	LINKTYPE_SERCOS_MONITOR	Sercos Monitor	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
278	LINKTYPE_OPENVIZSLA	OpenVizsla FPGA-based USB sniffer	[email protected]	OpenVizsla
279	LINKTYPE_EBHSCR	Elektrobit High Speed Capture and Replay (EBHSCR) format	[email protected]	EBHSCR
280	LINKTYPE_VPP_DISPATCH	fd.io VPP graph dispatcher trace records	[email protected]	FD.io-VPP
281	LINKTYPE_DSA_TAG_BRCM	Ethernet frames, with a Broadcom switch tag inserted	[email protected]	LINKTYPE_DSA_TAG_BRCM
282	LINKTYPE_DSA_TAG_BRCM_PREPEND	Ethernet frames, with a Broadcom switch tag prepended	[email protected]	LINKTYPE_DSA_TAG_BRCM_PREPEND
283	LINKTYPE_IEEE802_15_4_TAP	IEEE 802.15.4 with a tap header preceding it	[email protected]	Exegin-802.15.4-TAP
284	LINKTYPE_DSA_TAG_DSA	Ethernet frames, with a Marvell DSA switch tag inserted	[email protected]	LINKTYPE_DSA_TAG_DSA
285	LINKTYPE_DSA_TAG_EDSA	Ethernet frames, with a Marvell EDSA switch tag inserted	[email protected]	LINKTYPE_DSA_TAG_EDSA
286	LINKTYPE_ELEE	ELEE lawful intercept protocol	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
287	LINKTYPE_Z_WAVE_SERIAL	Serial frames transmitted between a host and a Z-Wave chip over an RS-232 or USB serial connection	[email protected]	Z-WAVE-SERIAL, section 5
288	LINKTYPE_USB_2_0	USB 2.0, 1.1, or 1.0 packets	[email protected]	LINKTYPE_USB_2_0
289	LINKTYPE_ATSC_ALP	ATSC Link-Layer Protocol frames	[email protected]	LINKTYPE_ATSC_ALP
290	LINKTYPE_ETW	Event Tracing for Windows messages	[email protected]	LINKTYPE_ETW
291	LINKTYPE_NETANALYZER_NG	Hilscher Gesellschaft fuer Systemautomation mbH netANALYZER NG hardware and software	[email protected]	https://www.tcpdump.org/linktypes.html; RFC-ietf-opsawg-pcaplinktype-18
292	LINKTYPE_ZBOSS_NCP	ZBOSS NCP Serial Protocol, with a pseudo-header	[email protected]	LINKTYPE_ZBOSS_NCP
293	LINKTYPE_USB_2_0_LOW_SPEED	Low-Speed USB 2.0, 1.1, or 1.0 packets	[email protected]	LINKTYPE_USB_2_0_LOW_SPEED
294	LINKTYPE_USB_2_0_FULL_SPEED	Full-Speed USB 2.0, 1.1, or 1.0 packets	[email protected]	LINKTYPE_USB_2_0_FULL_SPEED
295	LINKTYPE_USB_2_0_HIGH_SPEED	High-Speed USB 2.0 packets	[email protected]	LINKTYPE_USB_2_0_HIGH_SPEED
296	LINKTYPE_AUERSWALD_LOG	Auerswald Logger Protocol	[email protected]	Auerswald-Logger
297	LINKTYPE_ZWAVE_TAP	Z-Wave packets, with a metadata header	[email protected]	LINKTYPE_ZWAVE_TAP
298	LINKTYPE_SILABS_DEBUG_CHANNEL	Silicon Labs debug channel protocol	[email protected]	Silabs-Debug-Channel
299	LINKTYPE_FIRA_UCI	Ultra-wideband (UWB) controller interface protocol (UCI)	[email protected]	LINKTYPE_FIRA_UCI
300	LINKTYPE_MDB	MDB (Multi-Drop Bus) protocol	[email protected]	MDB-PCAP
301	LINKTYPE_DECT_NR	DECT-2020 New Radio (NR) MAC layer	[email protected]	LINKTYPE_DECT_NR
302-65000	Unassigned
65001-65535	Reserved for Experimental Use			RFC-ietf-opsawg-pcaplinktype-18

Contact Information

Name	Contact URI	Last Updated
[email protected]	linktype&tcpdump.org	2026-04-13