| isis.csnp.pdu_length | PDU length | Unsigned 16-bit integer | |
| isis.hello.circuit_type | Circuit type | Unsigned 8-bit integer | |
| isis.hello.clv_ipv4_int_addr | IPv4 interface address | IPv4 address | |
| isis.hello.clv_ipv6_int_addr | IPv6 interface address | IPv6 address | |
| isis.hello.clv_mt | MT-ID | Unsigned 16-bit integer | |
| isis.hello.clv_ptp_adj | Point-to-point Adjacency | Unsigned 8-bit integer | |
| isis.hello.holding_timer | Holding timer | Unsigned 16-bit integer | |
| isis.hello.lan_id | SystemID{ Designated IS } | Byte array | |
| isis.hello.local_circuit_id | Local circuit ID | Unsigned 8-bit integer | |
| isis.hello.pdu_length | PDU length | Unsigned 16-bit integer | |
| isis.hello.priority | Priority | Unsigned 8-bit integer | |
| isis.hello.source_id | SystemID{ Sender of PDU } | Byte array | |
| isis.irpd | Intra Domain Routing Protocol Discriminator | Unsigned 8-bit integer | |
| isis.len | PDU Header Length | Unsigned 8-bit integer | |
| isis.lsp.checksum | Checksum | Unsigned 16-bit integer | |
| isis.lsp.clv_ipv4_int_addr | IPv4 interface address | IPv4 address | |
| isis.lsp.clv_ipv6_int_addr | IPv6 interface address | IPv6 address | |
| isis.lsp.clv_mt | MT-ID | Unsigned 16-bit integer | |
| isis.lsp.clv_te_router_id | Traffic Engineering Router ID | IPv4 address | |
| isis.lsp.pdu_length | PDU length | Unsigned 16-bit integer | |
| isis.lsp.remaining_life | Remaining lifetime | Unsigned 16-bit integer | |
| isis.lsp.sequence_number | Sequence number | Unsigned 32-bit integer | |
| isis.max_area_adr | Max.AREAs: (0==3) | Unsigned 8-bit integer | |
| isis.psnp.pdu_length | PDU length | Unsigned 16-bit integer | |
| isis.reserved | Reserved (==0) | Unsigned 8-bit integer | |
| isis.sysid_len | System ID Length | Unsigned 8-bit integer | |
| isis.type | PDU Type | Unsigned 8-bit integer | |
| isis.version | Version (==1) | Unsigned 8-bit integer | |
| isis.version2 | Version2 (==1) | Unsigned 8-bit integer | |