Cisco 7609 Configuration Manual page 480

Understanding How NDE Works
Table 33-2 NDE Version 5 Flow Record Format
Bytes Content Description
0–3 srcaddr Source IP address
4–7 dstaddr Destination IP address
8–11 nexthop Next hop router's IP address
12–13 input Ingress interface SNMP ifIndex
14–15 output Egress interface SNMP ifIndex
16–19 dPkts Packets in the flow
20–23 dOctets Octets (bytes) in the flow
24–27 first SysUptime at start of the flow
28–31 last SysUptime at the time the
last packet of the flow was received
32–33 srcport Layer 4 source port number
or equivalent
34–35 dstport Layer 4 destination port number
or equivalent
36 pad1 Unused (zero) byte
37 tcp_flags Cumulative OR of TCP flags
38 prot Layer 4 protocol
(for example, 6=TCP, 17=UDP)
39 tos IP type-of-service byte
40–41 src_as Autonomous system number of the
source, either origin or peer
42–43 dst_as Autonomous system number of the
destination, either origin or peer
44–45 src_mask Source address prefix mask bits
46–47 dst_mask Destination address prefix mask bits
48 pad2 Pad 2 is unused (zero) bytes
1. Supported in Release 12.1(13)E and later releases.
2. With the destination flowmask, the "Next hop router's IP address" field and the "Output interface's SNMP ifIndex" field might not contain information
that is accurate for all flows.
Cisco 7600 Series Router Cisco IOS Software Configuration Guide—12.1E
33-4
Flow masks:
• X=Populated
• A=Additional field (see the
section on page 33-10)
Destination
Destination Source
X
X X
2
A A
2
A A
X X
X X
X X
X X
A
A A
Chapter 33 Configuring NDE
"Populating Additional NDE Fields"
Destination
Source
1
Interface Full
X X
X X
A A
X
A A
X X
X X
X X
X X
X
X
X
A A
A A
Full
1
Interface
X
X
A
X
A
X
X
X
X
X
X
X
A
A
78-14064-04