| Contents | Description | Contents | Description | Contents |
| srcaddr | Source IP address | IPV4_SRC_ADDR | 8 | 4 |
| dstaddr | Destination IP address | IPV4_DST_ADDR | 12 | 4 |
| nexthop | IP address of next hop router | IPV4_NEXT_HOP | 15 | 4 |
| input | SNMP index of input interface | INPUT_SNMP | 10 | 4 |
| output | SNMP index of output interface | OUTPUT_SNMP | 14 | 4 |
| dPkts | Packets in the flow | IN_PKTS | 2 | 4 |
| dOctets | Total number of Layer 3 bytes in the packets of the flow | IN_BYTES | 1 | 4 |
| first | SysUptime at start of flow | FIRST_SWITCHED | 22 | 4 |
| last | SysUptime at the time the last packet of the flow was received | LAST_SWITCHED | 21 | 4 |
| srcport | TCP/UDP source port number or equivalent | L4_SRC_PORT | 7 | 2 |
| dstport | TCP/UDP destination port number or equivalent | L4_DST_PORT | 11 | 2 |
| pad1 | Unused (zero) bytes | Not converted | N/A | N/A |
| tcp_flags | Cumulative OR of TCP flags | TCP_FLAGS | 6 | 1 |
| prot | IP protocol type (for example, TCP = 6; UDP = 17) | PROTOCOL | 4 | 1 |
| tos | IP type of service (ToS) | SRC_TOS | 5 | 1 |
| src_as | Autonomous system number of the source, either origin or peer | SRC_AS | 16 | 2 |
| dst_as | Autonomous system number of the destination, either origin or peer | DST_AS | 17 | 2 |
| src_mask | Source address prefix mask bits | SRC_MASK | 9 | 1 |
| dst_mask | Destination address prefix mask bits | DST_MASK | 13 | 1 |
| pad2 | Unused (zero) bytes | Not converted | N/A | N/A |