NetFlow v5/7
- Last Updated: September 16, 2026
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Note:
When you configure a monitoring port to use NetFlow version 5 as its export protocol, fields marked as "Exported by default" are automatically included in the export.
| Name | Description | Input Length (bytes) | Probe Configuration |
|---|---|---|---|
| srcaddr | Source IP address. | 4 | Exported by default |
| dstaddr | Destination IP address. | 4 | Exported by default |
| nexthop | IP address of next hop router. | 4 | Not applicable |
| input | SNMP index of input interface. | 2 | Exported by default |
| output | SNMP index of output interface. | 2 | Exported by default Always set to 0 |
| dPkts | Packets in the flow. | 4 | Exported by default |
| dOctets | Total number of Layer 3 bytes in the packets of the flow. | 4 | Exported by default |
| First | SysUptime at start of flow. | 4 | Exported by default |
| Last | SysUptime at the time the last packet of the flow was received. | 4 | Exported by default |
| srcport | TCP/UDP source port number or equivalent. | 2 | Exported by default |
| dstport | TCP/UDP destination port number or equivalent. | 2 | Exported by default |
| tcp_flags | Cumulative OR of TCP flags. | 1 | Exported by default |
| prot | IP protocol type (for example, TCP = 6; UDP = 17). | 1 | Exported by default |
| tos | IP type of service (ToS). | 1 | Exported by default |
| src_as | Autonomous system number of the source, either origin or peer. | 2 | Enabled by Use autonomous system list |
| dst_as | Autonomous system number of the destination, either origin or peer. | 2 | Enabled by Use autonomous system list |
| src_mask | Source address prefix mask bits. | 1 | Not supported |
| dst_mask | Destination address prefix mask bits. | 1 | Not supported |
router_sc (NetFlow v7 only) |
IP address of the router that is bypassed by the Catalyst 5000 series switch. This is the same address the router uses when it sends NetFlow export packets. This IP address is propagated to all switches bypassing the router through the FCP protocol. | 4 | Not applicable |